/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/unroll-cond-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 04:10:33,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 04:10:33,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 04:10:33,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 04:10:33,836 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 04:10:33,866 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 04:10:33,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 04:10:33,867 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 04:10:33,867 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 04:10:33,869 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 04:10:33,869 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 04:10:33,869 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 04:10:33,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 04:10:33,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 04:10:33,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 04:10:33,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 04:10:33,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 04:10:33,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 04:10:33,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 04:10:33,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 04:10:33,870 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 04:10:33,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 04:10:33,870 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 04:10:33,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 04:10:33,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 04:10:33,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 04:10:33,871 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 04:10:33,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 04:10:33,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:10:33,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 04:10:33,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 04:10:33,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 04:10:33,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 04:10:33,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 04:10:33,871 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 04:10:33,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 04:10:33,871 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 04:10:34,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 04:10:34,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 04:10:34,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 04:10:34,143 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 04:10:34,143 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 04:10:34,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl [2021-06-05 04:10:34,144 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl' [2021-06-05 04:10:34,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 04:10:34,178 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 04:10:34,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 04:10:34,180 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 04:10:34,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 04:10:34,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:10:34" (1/1) ... [2021-06-05 04:10:34,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:10:34" (1/1) ... [2021-06-05 04:10:34,198 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 04:10:34,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 04:10:34,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 04:10:34,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 04:10:34,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:10:34" (1/1) ... [2021-06-05 04:10:34,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:10:34" (1/1) ... [2021-06-05 04:10:34,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:10:34" (1/1) ... [2021-06-05 04:10:34,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:10:34" (1/1) ... [2021-06-05 04:10:34,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:10:34" (1/1) ... [2021-06-05 04:10:34,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:10:34" (1/1) ... [2021-06-05 04:10:34,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:10:34" (1/1) ... [2021-06-05 04:10:34,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 04:10:34,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 04:10:34,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 04:10:34,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 04:10:34,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:10:34" (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 04:10:34,272 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 04:10:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 04:10:34,273 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 04:10:34,273 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 04:10:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 04:10:34,273 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 04:10:34,273 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 04:10:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 04:10:34,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 04:10:34,274 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 04:10:34,578 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 04:10:34,578 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 04:10:34,579 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 04:10:34,580 INFO L202 PluginConnector]: Adding new model unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:10:34 BoogieIcfgContainer [2021-06-05 04:10:34,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 04:10:34,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 04:10:34,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 04:10:34,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 04:10:34,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:10:34" (1/2) ... [2021-06-05 04:10:34,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2d8a12 and model type unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:10:34, skipping insertion in model container [2021-06-05 04:10:34,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:10:34" (2/2) ... [2021-06-05 04:10:34,584 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.bpl [2021-06-05 04:10:34,588 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 04:10:34,588 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 04:10:34,588 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 04:10:34,589 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 04:10:34,637 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 04:10:34,652 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 04:10:34,678 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 04:10:34,678 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 04:10:34,678 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 04:10:34,678 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 04:10:34,678 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 04:10:34,678 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 04:10:34,679 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 04:10:34,679 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 04:10:34,687 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-06-05 04:10:34,695 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 16 states have (on average 1.8125) 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 04:10:34,696 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) 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 04:10:34,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:10:34,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:34,701 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:34,701 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:34,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:34,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1298021065, now seen corresponding path program 1 times [2021-06-05 04:10:34,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:34,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782272817] [2021-06-05 04:10:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:34,877 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 04:10:34,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:34,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782272817] [2021-06-05 04:10:34,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782272817] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:10:34,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:10:34,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:10:34,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15563701] [2021-06-05 04:10:34,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:10:34,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:34,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:10:34,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:10:34,890 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) 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) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:34,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:34,921 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-06-05 04:10:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:10:34,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:10:34,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:34,928 INFO L225 Difference]: With dead ends: 26 [2021-06-05 04:10:34,928 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 04:10:34,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:10:34,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 04:10:34,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 04:10:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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 04:10:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-06-05 04:10:34,948 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-06-05 04:10:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:34,948 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-06-05 04:10:34,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-06-05 04:10:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:10:34,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:34,949 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:34,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 04:10:34,949 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:34,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:34,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1253032747, now seen corresponding path program 2 times [2021-06-05 04:10:34,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:34,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920055205] [2021-06-05 04:10:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:34,996 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 04:10:34,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:34,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920055205] [2021-06-05 04:10:34,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920055205] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:10:34,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:10:34,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:10:34,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46246555] [2021-06-05 04:10:34,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:10:34,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:34,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:10:34,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:10:34,999 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:35,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:35,038 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-05 04:10:35,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:10:35,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:10:35,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:35,040 INFO L225 Difference]: With dead ends: 28 [2021-06-05 04:10:35,041 INFO L226 Difference]: Without dead ends: 23 [2021-06-05 04:10:35,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:10:35,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-06-05 04:10:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-06-05 04:10:35,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 04:10:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 04:10:35,044 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 04:10:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:35,044 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 04:10:35,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 04:10:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:10:35,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:35,045 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:35,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 04:10:35,045 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:35,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:35,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1876900165, now seen corresponding path program 1 times [2021-06-05 04:10:35,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:35,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390454977] [2021-06-05 04:10:35,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:35,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:35,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390454977] [2021-06-05 04:10:35,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390454977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:35,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589358195] [2021-06-05 04:10:35,218 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 04:10:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:35,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:10:35,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:35,441 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 11 treesize of output 7 [2021-06-05 04:10:35,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:35,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:35,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:35,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 04:10:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:35,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589358195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:35,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:35,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 04:10:35,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663277973] [2021-06-05 04:10:35,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:10:35,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:35,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:10:35,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:10:35,458 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) 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 04:10:35,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:35,516 INFO L93 Difference]: Finished difference Result 30 states and 51 transitions. [2021-06-05 04:10:35,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:10:35,516 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 11 [2021-06-05 04:10:35,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:35,517 INFO L225 Difference]: With dead ends: 30 [2021-06-05 04:10:35,517 INFO L226 Difference]: Without dead ends: 22 [2021-06-05 04:10:35,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:10:35,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-06-05 04:10:35,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-06-05 04:10:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-06-05 04:10:35,526 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-06-05 04:10:35,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:35,526 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-06-05 04:10:35,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 04:10:35,526 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-06-05 04:10:35,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:10:35,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:35,527 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:35,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 04:10:35,737 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:35,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:35,737 INFO L82 PathProgramCache]: Analyzing trace with hash 132986681, now seen corresponding path program 2 times [2021-06-05 04:10:35,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:35,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042866647] [2021-06-05 04:10:35,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:35,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:35,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042866647] [2021-06-05 04:10:35,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042866647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:35,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197794367] [2021-06-05 04:10:35,855 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 04:10:35,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:10:35,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:35,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:10:35,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:35,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:35,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-06-05 04:10:36,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 04:10:36,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:36,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-06-05 04:10:36,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:10:36,019 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 11 treesize of output 7 [2021-06-05 04:10:36,021 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:36,081 INFO L628 ElimStorePlain]: treesize reduction 34, result has 39.3 percent of original size [2021-06-05 04:10:36,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:36,082 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:22 [2021-06-05 04:10:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:36,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197794367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:36,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:36,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 04:10:36,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774703983] [2021-06-05 04:10:36,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:10:36,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:36,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:10:36,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:10:36,140 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) 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 04:10:36,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:36,211 INFO L93 Difference]: Finished difference Result 35 states and 68 transitions. [2021-06-05 04:10:36,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:10:36,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 11 [2021-06-05 04:10:36,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:36,215 INFO L225 Difference]: With dead ends: 35 [2021-06-05 04:10:36,215 INFO L226 Difference]: Without dead ends: 30 [2021-06-05 04:10:36,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:10:36,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-06-05 04:10:36,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-06-05 04:10:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-06-05 04:10:36,221 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-06-05 04:10:36,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:36,221 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-06-05 04:10:36,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 04:10:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-06-05 04:10:36,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:10:36,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:36,222 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:36,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:36,437 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:36,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:36,437 INFO L82 PathProgramCache]: Analyzing trace with hash -788714619, now seen corresponding path program 3 times [2021-06-05 04:10:36,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:36,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566291796] [2021-06-05 04:10:36,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:36,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:36,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566291796] [2021-06-05 04:10:36,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566291796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:36,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126541413] [2021-06-05 04:10:36,476 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 04:10:36,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:10:36,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:36,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:10:36,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:36,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:36,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-06-05 04:10:36,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 04:10:36,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:36,616 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-06-05 04:10:36,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:10:36,620 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 11 treesize of output 7 [2021-06-05 04:10:36,621 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:36,680 INFO L628 ElimStorePlain]: treesize reduction 34, result has 39.3 percent of original size [2021-06-05 04:10:36,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:36,681 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:22 [2021-06-05 04:10:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:36,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126541413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:36,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:36,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 04:10:36,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484029788] [2021-06-05 04:10:36,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:10:36,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:36,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:10:36,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:10:36,719 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) 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 04:10:36,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:36,844 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2021-06-05 04:10:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:10:36,844 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 11 [2021-06-05 04:10:36,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:36,845 INFO L225 Difference]: With dead ends: 51 [2021-06-05 04:10:36,845 INFO L226 Difference]: Without dead ends: 41 [2021-06-05 04:10:36,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:10:36,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-05 04:10:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-06-05 04:10:36,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-06-05 04:10:36,848 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-06-05 04:10:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:36,848 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-06-05 04:10:36,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 04:10:36,848 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-06-05 04:10:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:10:36,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:36,849 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:37,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 04:10:37,060 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:37,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1870228548, now seen corresponding path program 1 times [2021-06-05 04:10:37,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:37,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029715983] [2021-06-05 04:10:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:37,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:37,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029715983] [2021-06-05 04:10:37,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029715983] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:10:37,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:10:37,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:10:37,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907235058] [2021-06-05 04:10:37,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:10:37,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:37,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:10:37,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:10:37,091 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:37,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:37,110 INFO L93 Difference]: Finished difference Result 29 states and 52 transitions. [2021-06-05 04:10:37,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:10:37,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:10:37,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:37,111 INFO L225 Difference]: With dead ends: 29 [2021-06-05 04:10:37,111 INFO L226 Difference]: Without dead ends: 29 [2021-06-05 04:10:37,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:10:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-06-05 04:10:37,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-06-05 04:10:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-06-05 04:10:37,114 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-06-05 04:10:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:37,114 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-06-05 04:10:37,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:37,114 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-06-05 04:10:37,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:10:37,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:37,115 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:37,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 04:10:37,115 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:37,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:37,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1515210487, now seen corresponding path program 4 times [2021-06-05 04:10:37,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:37,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818222749] [2021-06-05 04:10:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:37,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:37,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818222749] [2021-06-05 04:10:37,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818222749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:37,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122072316] [2021-06-05 04:10:37,236 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 04:10:37,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:10:37,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:37,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:10:37,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:37,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:37,361 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 04:10:37,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:37,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:37,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:37,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 04:10:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:37,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122072316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:37,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:37,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 04:10:37,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186218242] [2021-06-05 04:10:37,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:10:37,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:37,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:10:37,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:10:37,373 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) 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 04:10:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:37,440 INFO L93 Difference]: Finished difference Result 37 states and 65 transitions. [2021-06-05 04:10:37,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:10:37,440 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) 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 12 [2021-06-05 04:10:37,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:37,441 INFO L225 Difference]: With dead ends: 37 [2021-06-05 04:10:37,441 INFO L226 Difference]: Without dead ends: 29 [2021-06-05 04:10:37,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:10:37,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-06-05 04:10:37,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-06-05 04:10:37,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 04:10:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-06-05 04:10:37,451 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-06-05 04:10:37,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:37,452 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-06-05 04:10:37,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) 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 04:10:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-06-05 04:10:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:10:37,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:37,453 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:37,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:37,669 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:37,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:37,670 INFO L82 PathProgramCache]: Analyzing trace with hash -228702997, now seen corresponding path program 5 times [2021-06-05 04:10:37,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:37,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185113125] [2021-06-05 04:10:37,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:37,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:37,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185113125] [2021-06-05 04:10:37,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185113125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:37,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704952846] [2021-06-05 04:10:37,819 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:37,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:10:37,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:37,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:10:37,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:37,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:37,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-06-05 04:10:37,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:10:37,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:37,939 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 04:10:37,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:37,990 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:10:37,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:37,992 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:18 [2021-06-05 04:10:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:38,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704952846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:38,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:38,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 04:10:38,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91219852] [2021-06-05 04:10:38,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:10:38,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:38,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:10:38,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:10:38,029 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) 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 04:10:38,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:38,105 INFO L93 Difference]: Finished difference Result 40 states and 76 transitions. [2021-06-05 04:10:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:10:38,106 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) 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 12 [2021-06-05 04:10:38,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:38,106 INFO L225 Difference]: With dead ends: 40 [2021-06-05 04:10:38,106 INFO L226 Difference]: Without dead ends: 35 [2021-06-05 04:10:38,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:10:38,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-06-05 04:10:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-06-05 04:10:38,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 04:10:38,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-06-05 04:10:38,108 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-06-05 04:10:38,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:38,108 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-06-05 04:10:38,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) 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 04:10:38,108 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-06-05 04:10:38,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:10:38,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:38,109 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:38,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 04:10:38,313 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:38,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:38,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1150404297, now seen corresponding path program 6 times [2021-06-05 04:10:38,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:38,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107710671] [2021-06-05 04:10:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:38,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:38,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107710671] [2021-06-05 04:10:38,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107710671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:38,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879220854] [2021-06-05 04:10:38,400 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 04:10:38,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:10:38,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:38,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:10:38,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:38,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:38,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-06-05 04:10:38,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:10:38,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:38,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 04:10:38,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:38,585 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:10:38,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:38,586 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:18 [2021-06-05 04:10:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:38,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879220854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:38,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:38,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 04:10:38,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136352431] [2021-06-05 04:10:38,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:10:38,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:38,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:10:38,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:10:38,618 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) 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 04:10:38,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:38,741 INFO L93 Difference]: Finished difference Result 61 states and 110 transitions. [2021-06-05 04:10:38,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:10:38,742 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) 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 12 [2021-06-05 04:10:38,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:38,742 INFO L225 Difference]: With dead ends: 61 [2021-06-05 04:10:38,742 INFO L226 Difference]: Without dead ends: 51 [2021-06-05 04:10:38,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:10:38,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-06-05 04:10:38,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2021-06-05 04:10:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 04:10:38,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-06-05 04:10:38,745 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-06-05 04:10:38,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:38,745 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-06-05 04:10:38,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) 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 04:10:38,745 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-06-05 04:10:38,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:10:38,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:38,746 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:38,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:38,967 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:38,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:38,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1508538870, now seen corresponding path program 1 times [2021-06-05 04:10:38,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:38,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829295175] [2021-06-05 04:10:38,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:38,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:38,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829295175] [2021-06-05 04:10:38,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829295175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:38,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535590986] [2021-06-05 04:10:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order 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 04:10:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:39,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 04:10:39,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:39,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535590986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:39,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:39,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 04:10:39,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283633006] [2021-06-05 04:10:39,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 04:10:39,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:39,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 04:10:39,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:10:39,048 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:39,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:39,076 INFO L93 Difference]: Finished difference Result 59 states and 102 transitions. [2021-06-05 04:10:39,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:10:39,081 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 04:10:39,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:39,082 INFO L225 Difference]: With dead ends: 59 [2021-06-05 04:10:39,082 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 04:10:39,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:10:39,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 04:10:39,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 30. [2021-06-05 04:10:39,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:39,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2021-06-05 04:10:39,087 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 12 [2021-06-05 04:10:39,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:39,087 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2021-06-05 04:10:39,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:39,087 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2021-06-05 04:10:39,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:10:39,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:39,087 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:39,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:39,293 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:39,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:39,293 INFO L82 PathProgramCache]: Analyzing trace with hash -549695156, now seen corresponding path program 2 times [2021-06-05 04:10:39,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:39,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199746972] [2021-06-05 04:10:39,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:39,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:39,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199746972] [2021-06-05 04:10:39,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199746972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:39,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906778783] [2021-06-05 04:10:39,312 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 04:10:39,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:10:39,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:39,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 04:10:39,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:39,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906778783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:39,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:39,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 04:10:39,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698544868] [2021-06-05 04:10:39,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 04:10:39,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:39,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 04:10:39,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:10:39,386 INFO L87 Difference]: Start difference. First operand 30 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:39,417 INFO L93 Difference]: Finished difference Result 43 states and 82 transitions. [2021-06-05 04:10:39,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:10:39,417 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 04:10:39,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:39,418 INFO L225 Difference]: With dead ends: 43 [2021-06-05 04:10:39,418 INFO L226 Difference]: Without dead ends: 43 [2021-06-05 04:10:39,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:10:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-05 04:10:39,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2021-06-05 04:10:39,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:39,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2021-06-05 04:10:39,428 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 12 [2021-06-05 04:10:39,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:39,428 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2021-06-05 04:10:39,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2021-06-05 04:10:39,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:10:39,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:39,428 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:39,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 04:10:39,645 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:39,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:39,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1107234939, now seen corresponding path program 7 times [2021-06-05 04:10:39,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:39,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813166178] [2021-06-05 04:10:39,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:39,705 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 04:10:39,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:39,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813166178] [2021-06-05 04:10:39,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813166178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:39,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890827909] [2021-06-05 04:10:39,706 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:10:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:39,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:10:39,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:39,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:39,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:10:39,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:39,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:39,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:39,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 04:10:39,894 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 04:10:39,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890827909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:39,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:39,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 04:10:39,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168540549] [2021-06-05 04:10:39,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:10:39,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:39,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:10:39,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:10:39,895 INFO L87 Difference]: Start difference. First operand 32 states and 64 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:10:39,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:39,956 INFO L93 Difference]: Finished difference Result 44 states and 87 transitions. [2021-06-05 04:10:39,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:10:39,956 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 13 [2021-06-05 04:10:39,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:39,957 INFO L225 Difference]: With dead ends: 44 [2021-06-05 04:10:39,957 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 04:10:39,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:10:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 04:10:39,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-06-05 04:10:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 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 04:10:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 75 transitions. [2021-06-05 04:10:39,959 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 75 transitions. Word has length 13 [2021-06-05 04:10:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:39,959 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 75 transitions. [2021-06-05 04:10:39,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:10:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 75 transitions. [2021-06-05 04:10:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:10:39,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:39,959 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:40,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:40,175 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:40,176 INFO L82 PathProgramCache]: Analyzing trace with hash 522117573, now seen corresponding path program 8 times [2021-06-05 04:10:40,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:40,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011790141] [2021-06-05 04:10:40,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:40,240 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 04:10:40,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:40,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011790141] [2021-06-05 04:10:40,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011790141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:40,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704012308] [2021-06-05 04:10:40,240 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 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 04:10:40,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:10:40,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:40,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:10:40,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:40,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:40,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:10:40,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:40,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:40,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:40,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 04:10:40,391 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 04:10:40,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704012308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:40,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:40,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 04:10:40,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136369649] [2021-06-05 04:10:40,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:10:40,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:40,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:10:40,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:10:40,392 INFO L87 Difference]: Start difference. First operand 37 states and 75 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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 04:10:40,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:40,475 INFO L93 Difference]: Finished difference Result 55 states and 100 transitions. [2021-06-05 04:10:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:10:40,476 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 13 [2021-06-05 04:10:40,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:40,477 INFO L225 Difference]: With dead ends: 55 [2021-06-05 04:10:40,477 INFO L226 Difference]: Without dead ends: 50 [2021-06-05 04:10:40,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:10:40,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-05 04:10:40,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-06-05 04:10:40,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 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 04:10:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 75 transitions. [2021-06-05 04:10:40,483 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 75 transitions. Word has length 13 [2021-06-05 04:10:40,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:40,483 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 75 transitions. [2021-06-05 04:10:40,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 04:10:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 75 transitions. [2021-06-05 04:10:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:10:40,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:40,484 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:40,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:40,697 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:40,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:40,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1113906556, now seen corresponding path program 3 times [2021-06-05 04:10:40,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:40,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527565173] [2021-06-05 04:10:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:40,717 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 04:10:40,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:40,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527565173] [2021-06-05 04:10:40,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527565173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:40,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214239050] [2021-06-05 04:10:40,718 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 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 04:10:40,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:10:40,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:40,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 04:10:40,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:40,787 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 04:10:40,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214239050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:40,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:40,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 04:10:40,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001703810] [2021-06-05 04:10:40,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:10:40,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:40,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:10:40,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:10:40,788 INFO L87 Difference]: Start difference. First operand 37 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:40,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:40,821 INFO L93 Difference]: Finished difference Result 85 states and 153 transitions. [2021-06-05 04:10:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:10:40,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 04:10:40,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:40,822 INFO L225 Difference]: With dead ends: 85 [2021-06-05 04:10:40,822 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 04:10:40,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:10:40,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 04:10:40,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 38. [2021-06-05 04:10:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:40,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2021-06-05 04:10:40,830 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2021-06-05 04:10:40,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:40,830 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2021-06-05 04:10:40,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:40,830 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2021-06-05 04:10:40,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:10:40,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:40,830 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:41,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 04:10:41,031 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:41,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:41,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1122826714, now seen corresponding path program 4 times [2021-06-05 04:10:41,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:41,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824372219] [2021-06-05 04:10:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:41,049 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 04:10:41,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:41,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824372219] [2021-06-05 04:10:41,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824372219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:41,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350194732] [2021-06-05 04:10:41,050 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 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 04:10:41,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:10:41,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:41,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 04:10:41,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:41,101 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 04:10:41,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350194732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:41,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:41,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 04:10:41,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610624006] [2021-06-05 04:10:41,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:10:41,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:41,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:10:41,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:10:41,103 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:41,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:41,144 INFO L93 Difference]: Finished difference Result 65 states and 121 transitions. [2021-06-05 04:10:41,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:10:41,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 04:10:41,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:41,145 INFO L225 Difference]: With dead ends: 65 [2021-06-05 04:10:41,145 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 04:10:41,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:10:41,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 04:10:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2021-06-05 04:10:41,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2021-06-05 04:10:41,147 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2021-06-05 04:10:41,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:41,147 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2021-06-05 04:10:41,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:41,147 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2021-06-05 04:10:41,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:10:41,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:41,147 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:41,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:41,363 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:41,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:41,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1022462021, now seen corresponding path program 9 times [2021-06-05 04:10:41,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:41,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316903744] [2021-06-05 04:10:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:41,398 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 04:10:41,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:41,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316903744] [2021-06-05 04:10:41,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316903744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:41,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097819334] [2021-06-05 04:10:41,399 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 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 04:10:41,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:10:41,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:41,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:10:41,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:41,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:41,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:10:41,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:41,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:41,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:41,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 04:10:41,588 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 04:10:41,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097819334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:41,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:41,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 04:10:41,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516996074] [2021-06-05 04:10:41,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:10:41,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:41,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:10:41,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:10:41,589 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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 04:10:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:41,694 INFO L93 Difference]: Finished difference Result 78 states and 134 transitions. [2021-06-05 04:10:41,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:10:41,695 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 13 [2021-06-05 04:10:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:41,695 INFO L225 Difference]: With dead ends: 78 [2021-06-05 04:10:41,695 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 04:10:41,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:10:41,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 04:10:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2021-06-05 04:10:41,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2021-06-05 04:10:41,698 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 13 [2021-06-05 04:10:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:41,698 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2021-06-05 04:10:41,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 04:10:41,698 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2021-06-05 04:10:41,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:10:41,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:41,698 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:41,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 04:10:41,913 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:41,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1742081348, now seen corresponding path program 5 times [2021-06-05 04:10:41,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:41,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68579115] [2021-06-05 04:10:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:41,948 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 04:10:41,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:41,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68579115] [2021-06-05 04:10:41,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68579115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:41,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959679041] [2021-06-05 04:10:41,948 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:10:41,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:10:41,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:41,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 04:10:41,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:42,023 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 04:10:42,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959679041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:42,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:42,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 04:10:42,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260608473] [2021-06-05 04:10:42,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:10:42,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:42,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:10:42,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:10:42,025 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 04:10:42,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:42,065 INFO L93 Difference]: Finished difference Result 65 states and 130 transitions. [2021-06-05 04:10:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:10:42,065 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-06-05 04:10:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:42,066 INFO L225 Difference]: With dead ends: 65 [2021-06-05 04:10:42,066 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 04:10:42,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:10:42,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 04:10:42,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2021-06-05 04:10:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:42,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 91 transitions. [2021-06-05 04:10:42,071 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 91 transitions. Word has length 13 [2021-06-05 04:10:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:42,071 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 91 transitions. [2021-06-05 04:10:42,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 04:10:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 91 transitions. [2021-06-05 04:10:42,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:10:42,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:42,074 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:42,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:42,293 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:42,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:42,293 INFO L82 PathProgramCache]: Analyzing trace with hash -798664521, now seen corresponding path program 10 times [2021-06-05 04:10:42,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:42,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686253627] [2021-06-05 04:10:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:42,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:42,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686253627] [2021-06-05 04:10:42,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686253627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:42,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648297077] [2021-06-05 04:10:42,317 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:42,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:10:42,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:42,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:10:42,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:42,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648297077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:42,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:42,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 04:10:42,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469742761] [2021-06-05 04:10:42,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:10:42,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:42,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:10:42,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:10:42,390 INFO L87 Difference]: Start difference. First operand 43 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:10:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:42,429 INFO L93 Difference]: Finished difference Result 84 states and 148 transitions. [2021-06-05 04:10:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:10:42,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-06-05 04:10:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:42,429 INFO L225 Difference]: With dead ends: 84 [2021-06-05 04:10:42,429 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 04:10:42,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:10:42,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 04:10:42,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 43. [2021-06-05 04:10:42,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 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 04:10:42,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 93 transitions. [2021-06-05 04:10:42,432 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 93 transitions. Word has length 14 [2021-06-05 04:10:42,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:42,433 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 93 transitions. [2021-06-05 04:10:42,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:10:42,433 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 93 transitions. [2021-06-05 04:10:42,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:10:42,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:42,433 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:42,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:42,649 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:42,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:42,649 INFO L82 PathProgramCache]: Analyzing trace with hash 861067660, now seen corresponding path program 6 times [2021-06-05 04:10:42,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:42,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297732887] [2021-06-05 04:10:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:42,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:42,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297732887] [2021-06-05 04:10:42,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297732887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:42,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071193173] [2021-06-05 04:10:42,671 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 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 04:10:42,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:10:42,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:42,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:10:42,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:42,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071193173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:42,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:42,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 04:10:42,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421588543] [2021-06-05 04:10:42,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:10:42,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:42,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:10:42,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:10:42,738 INFO L87 Difference]: Start difference. First operand 43 states and 93 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:10:42,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:42,813 INFO L93 Difference]: Finished difference Result 106 states and 189 transitions. [2021-06-05 04:10:42,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:10:42,813 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-06-05 04:10:42,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:42,813 INFO L225 Difference]: With dead ends: 106 [2021-06-05 04:10:42,813 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 04:10:42,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:10:42,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 04:10:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 49. [2021-06-05 04:10:42,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2916666666666665) internal successors, (110), 48 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:42,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 110 transitions. [2021-06-05 04:10:42,815 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 110 transitions. Word has length 14 [2021-06-05 04:10:42,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:42,815 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 110 transitions. [2021-06-05 04:10:42,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:10:42,816 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 110 transitions. [2021-06-05 04:10:42,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:10:42,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:42,816 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:43,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:43,034 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:43,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:43,035 INFO L82 PathProgramCache]: Analyzing trace with hash 830687991, now seen corresponding path program 11 times [2021-06-05 04:10:43,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:43,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22807780] [2021-06-05 04:10:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:43,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:43,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22807780] [2021-06-05 04:10:43,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22807780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:43,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774629633] [2021-06-05 04:10:43,057 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 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 04:10:43,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:10:43,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:43,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:10:43,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:43,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774629633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:43,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:43,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 04:10:43,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810676517] [2021-06-05 04:10:43,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:10:43,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:43,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:10:43,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:10:43,103 INFO L87 Difference]: Start difference. First operand 49 states and 110 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:10:43,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:43,147 INFO L93 Difference]: Finished difference Result 60 states and 123 transitions. [2021-06-05 04:10:43,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:10:43,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-06-05 04:10:43,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:43,148 INFO L225 Difference]: With dead ends: 60 [2021-06-05 04:10:43,148 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 04:10:43,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:10:43,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 04:10:43,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-06-05 04:10:43,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:43,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 109 transitions. [2021-06-05 04:10:43,150 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 109 transitions. Word has length 14 [2021-06-05 04:10:43,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:43,150 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 109 transitions. [2021-06-05 04:10:43,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:10:43,150 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 109 transitions. [2021-06-05 04:10:43,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:10:43,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:43,151 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:43,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 04:10:43,367 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:43,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:43,367 INFO L82 PathProgramCache]: Analyzing trace with hash -805336138, now seen corresponding path program 7 times [2021-06-05 04:10:43,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:43,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741791234] [2021-06-05 04:10:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:43,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:43,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741791234] [2021-06-05 04:10:43,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741791234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:43,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378838627] [2021-06-05 04:10:43,388 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 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 04:10:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:43,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:10:43,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:43,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378838627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:43,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:43,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 04:10:43,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94983301] [2021-06-05 04:10:43,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:10:43,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:43,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:10:43,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:10:43,462 INFO L87 Difference]: Start difference. First operand 49 states and 109 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:10:43,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:43,499 INFO L93 Difference]: Finished difference Result 94 states and 171 transitions. [2021-06-05 04:10:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:10:43,500 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-06-05 04:10:43,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:43,500 INFO L225 Difference]: With dead ends: 94 [2021-06-05 04:10:43,500 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 04:10:43,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:10:43,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 04:10:43,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 46. [2021-06-05 04:10:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 97 transitions. [2021-06-05 04:10:43,502 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 97 transitions. Word has length 14 [2021-06-05 04:10:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:43,502 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 97 transitions. [2021-06-05 04:10:43,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:10:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 97 transitions. [2021-06-05 04:10:43,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:10:43,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:43,503 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:43,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 04:10:43,717 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:43,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:43,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1972248533, now seen corresponding path program 12 times [2021-06-05 04:10:43,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:43,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445819103] [2021-06-05 04:10:43,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:43,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:43,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445819103] [2021-06-05 04:10:43,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445819103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:43,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098316144] [2021-06-05 04:10:43,741 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 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 04:10:43,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:10:43,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:43,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:10:43,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:43,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098316144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:43,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:43,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 04:10:43,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978075396] [2021-06-05 04:10:43,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:10:43,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:43,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:10:43,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:10:43,789 INFO L87 Difference]: Start difference. First operand 46 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:10:43,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:43,834 INFO L93 Difference]: Finished difference Result 59 states and 113 transitions. [2021-06-05 04:10:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:10:43,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-06-05 04:10:43,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:43,835 INFO L225 Difference]: With dead ends: 59 [2021-06-05 04:10:43,835 INFO L226 Difference]: Without dead ends: 55 [2021-06-05 04:10:43,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:10:43,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-05 04:10:43,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2021-06-05 04:10:43,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 45 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:43,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 96 transitions. [2021-06-05 04:10:43,836 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 96 transitions. Word has length 14 [2021-06-05 04:10:43,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:43,837 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 96 transitions. [2021-06-05 04:10:43,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:10:43,837 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 96 transitions. [2021-06-05 04:10:43,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:10:43,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:43,837 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:44,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 04:10:44,053 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:44,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:44,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1431397132, now seen corresponding path program 8 times [2021-06-05 04:10:44,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:44,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884488213] [2021-06-05 04:10:44,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:44,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:44,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884488213] [2021-06-05 04:10:44,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884488213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:44,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093311864] [2021-06-05 04:10:44,081 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 04:10:44,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:10:44,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:44,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:10:44,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:44,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093311864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:44,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:44,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 04:10:44,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303698473] [2021-06-05 04:10:44,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:10:44,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:44,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:10:44,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:10:44,148 INFO L87 Difference]: Start difference. First operand 46 states and 96 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:10:44,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:44,219 INFO L93 Difference]: Finished difference Result 91 states and 166 transitions. [2021-06-05 04:10:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:10:44,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-06-05 04:10:44,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:44,220 INFO L225 Difference]: With dead ends: 91 [2021-06-05 04:10:44,220 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 04:10:44,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:10:44,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 04:10:44,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 47. [2021-06-05 04:10:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 46 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 04:10:44,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2021-06-05 04:10:44,221 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 14 [2021-06-05 04:10:44,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:44,222 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2021-06-05 04:10:44,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:10:44,222 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2021-06-05 04:10:44,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:10:44,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:44,222 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:44,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 04:10:44,429 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:44,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:44,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1331032439, now seen corresponding path program 13 times [2021-06-05 04:10:44,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:44,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081417166] [2021-06-05 04:10:44,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:44,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:44,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081417166] [2021-06-05 04:10:44,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081417166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:44,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283819562] [2021-06-05 04:10:44,453 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 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 04:10:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:44,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:10:44,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:44,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283819562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:44,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:44,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 04:10:44,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081406501] [2021-06-05 04:10:44,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:10:44,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:44,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:10:44,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:10:44,516 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:10:44,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:44,548 INFO L93 Difference]: Finished difference Result 62 states and 119 transitions. [2021-06-05 04:10:44,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:10:44,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-06-05 04:10:44,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:44,548 INFO L225 Difference]: With dead ends: 62 [2021-06-05 04:10:44,548 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 04:10:44,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:10:44,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 04:10:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-06-05 04:10:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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 04:10:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-06-05 04:10:44,550 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-06-05 04:10:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:44,550 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-06-05 04:10:44,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:10:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-06-05 04:10:44,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:10:44,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:44,550 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:44,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 04:10:44,765 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:44,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2050651766, now seen corresponding path program 9 times [2021-06-05 04:10:44,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:44,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256411186] [2021-06-05 04:10:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:44,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:44,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256411186] [2021-06-05 04:10:44,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256411186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:44,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399757479] [2021-06-05 04:10:44,798 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 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 04:10:44,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:10:44,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:44,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:10:44,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:44,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399757479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:44,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:44,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 04:10:44,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438198346] [2021-06-05 04:10:44,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:10:44,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:44,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:10:44,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:10:44,879 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:10:44,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:44,934 INFO L93 Difference]: Finished difference Result 88 states and 165 transitions. [2021-06-05 04:10:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:10:44,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-06-05 04:10:44,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:44,935 INFO L225 Difference]: With dead ends: 88 [2021-06-05 04:10:44,935 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 04:10:44,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:10:44,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 04:10:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2021-06-05 04:10:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 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 04:10:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-06-05 04:10:44,939 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-06-05 04:10:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:44,939 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-06-05 04:10:44,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:10:44,939 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-06-05 04:10:44,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:10:44,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:44,939 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:45,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:45,155 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:45,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:45,155 INFO L82 PathProgramCache]: Analyzing trace with hash 653527467, now seen corresponding path program 14 times [2021-06-05 04:10:45,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:45,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100377731] [2021-06-05 04:10:45,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:45,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:45,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100377731] [2021-06-05 04:10:45,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100377731] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:10:45,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:10:45,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 04:10:45,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95054933] [2021-06-05 04:10:45,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:10:45,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:45,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:10:45,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:10:45,231 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:45,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:45,249 INFO L93 Difference]: Finished difference Result 53 states and 106 transitions. [2021-06-05 04:10:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:10:45,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 04:10:45,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:45,250 INFO L225 Difference]: With dead ends: 53 [2021-06-05 04:10:45,250 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 04:10:45,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:10:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 04:10:45,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-06-05 04:10:45,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 95 transitions. [2021-06-05 04:10:45,257 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 95 transitions. Word has length 14 [2021-06-05 04:10:45,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:45,257 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 95 transitions. [2021-06-05 04:10:45,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:45,258 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 95 transitions. [2021-06-05 04:10:45,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:10:45,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:45,258 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:45,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-06-05 04:10:45,258 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:45,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:45,259 INFO L82 PathProgramCache]: Analyzing trace with hash -227291060, now seen corresponding path program 10 times [2021-06-05 04:10:45,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:45,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028447531] [2021-06-05 04:10:45,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:45,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:45,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028447531] [2021-06-05 04:10:45,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028447531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:45,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107609218] [2021-06-05 04:10:45,283 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 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 04:10:45,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:10:45,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:45,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:10:45,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:45,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107609218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:45,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:45,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 04:10:45,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671201443] [2021-06-05 04:10:45,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:10:45,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:45,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:10:45,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:10:45,366 INFO L87 Difference]: Start difference. First operand 45 states and 95 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:45,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:45,413 INFO L93 Difference]: Finished difference Result 91 states and 185 transitions. [2021-06-05 04:10:45,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:10:45,413 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 04:10:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:45,413 INFO L225 Difference]: With dead ends: 91 [2021-06-05 04:10:45,413 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 04:10:45,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:10:45,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 04:10:45,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2021-06-05 04:10:45,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 110 transitions. [2021-06-05 04:10:45,415 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 110 transitions. Word has length 14 [2021-06-05 04:10:45,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:45,415 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 110 transitions. [2021-06-05 04:10:45,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:45,415 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 110 transitions. [2021-06-05 04:10:45,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:10:45,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:45,415 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:45,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:45,633 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:45,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:45,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1836816026, now seen corresponding path program 11 times [2021-06-05 04:10:45,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:45,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980516851] [2021-06-05 04:10:45,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:45,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:45,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980516851] [2021-06-05 04:10:45,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980516851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:45,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016717406] [2021-06-05 04:10:45,702 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 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 04:10:45,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:10:45,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:45,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:10:45,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:45,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:45,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:10:45,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:45,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:45,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:45,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:3 [2021-06-05 04:10:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:45,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016717406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:45,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:45,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:10:45,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543077243] [2021-06-05 04:10:45,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:45,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:45,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:45,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:45,933 INFO L87 Difference]: Start difference. First operand 51 states and 110 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:46,048 INFO L93 Difference]: Finished difference Result 66 states and 137 transitions. [2021-06-05 04:10:46,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:10:46,048 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:10:46,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:46,049 INFO L225 Difference]: With dead ends: 66 [2021-06-05 04:10:46,049 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 04:10:46,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:10:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 04:10:46,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-06-05 04:10:46,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 52 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 114 transitions. [2021-06-05 04:10:46,050 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 114 transitions. Word has length 15 [2021-06-05 04:10:46,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:46,050 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 114 transitions. [2021-06-05 04:10:46,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:46,050 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 114 transitions. [2021-06-05 04:10:46,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:10:46,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:46,051 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:46,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:46,265 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:46,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:46,265 INFO L82 PathProgramCache]: Analyzing trace with hash 170412228, now seen corresponding path program 12 times [2021-06-05 04:10:46,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:46,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401329835] [2021-06-05 04:10:46,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:46,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:46,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401329835] [2021-06-05 04:10:46,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401329835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:46,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190198669] [2021-06-05 04:10:46,327 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 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 04:10:46,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:10:46,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:46,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:10:46,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:46,747 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 2061 DAG size of output: 44 [2021-06-05 04:10:46,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:46,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:10:46,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:46,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:46,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:46,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 04:10:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:46,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190198669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:46,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:46,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:10:46,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460042056] [2021-06-05 04:10:46,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:46,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:46,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:46,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:46,814 INFO L87 Difference]: Start difference. First operand 53 states and 114 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:47,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:47,030 INFO L93 Difference]: Finished difference Result 83 states and 179 transitions. [2021-06-05 04:10:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:10:47,030 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:10:47,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:47,030 INFO L225 Difference]: With dead ends: 83 [2021-06-05 04:10:47,030 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 04:10:47,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:10:47,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 04:10:47,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-06-05 04:10:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 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 04:10:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-06-05 04:10:47,032 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2021-06-05 04:10:47,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:47,032 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-06-05 04:10:47,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-06-05 04:10:47,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:10:47,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:47,033 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:47,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 04:10:47,249 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:47,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:47,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1029286758, now seen corresponding path program 13 times [2021-06-05 04:10:47,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:47,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822944940] [2021-06-05 04:10:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:47,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:47,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:47,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822944940] [2021-06-05 04:10:47,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822944940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:47,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32554048] [2021-06-05 04:10:47,314 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 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 04:10:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:47,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:10:47,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:47,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:47,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:10:47,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:10:47,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:47,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:47,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:47,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:47,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:47,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:10:47,614 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:47,627 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:10:47,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:47,628 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 04:10:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:47,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32554048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:47,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:47,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:10:47,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895440529] [2021-06-05 04:10:47,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:47,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:47,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:47,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:47,652 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:47,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:47,850 INFO L93 Difference]: Finished difference Result 102 states and 223 transitions. [2021-06-05 04:10:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:10:47,850 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:10:47,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:47,851 INFO L225 Difference]: With dead ends: 102 [2021-06-05 04:10:47,851 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:10:47,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:10:47,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:10:47,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2021-06-05 04:10:47,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 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 04:10:47,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-06-05 04:10:47,853 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2021-06-05 04:10:47,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:47,853 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-06-05 04:10:47,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-06-05 04:10:47,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:10:47,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:47,854 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:48,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:48,069 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:48,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1887821798, now seen corresponding path program 14 times [2021-06-05 04:10:48,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:48,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254805721] [2021-06-05 04:10:48,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:48,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:48,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254805721] [2021-06-05 04:10:48,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254805721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:48,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866302574] [2021-06-05 04:10:48,130 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 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 04:10:48,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:10:48,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:48,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:10:48,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:48,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:48,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:10:48,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:48,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:48,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:48,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 04:10:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:48,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866302574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:48,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:48,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:10:48,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770106226] [2021-06-05 04:10:48,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:48,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:48,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:48,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:48,336 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:48,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:48,555 INFO L93 Difference]: Finished difference Result 93 states and 210 transitions. [2021-06-05 04:10:48,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:10:48,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:10:48,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:48,556 INFO L225 Difference]: With dead ends: 93 [2021-06-05 04:10:48,556 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 04:10:48,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 182.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:10:48,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 04:10:48,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-06-05 04:10:48,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.515151515151515) internal successors, (166), 66 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 04:10:48,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 166 transitions. [2021-06-05 04:10:48,558 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 166 transitions. Word has length 15 [2021-06-05 04:10:48,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:48,558 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 166 transitions. [2021-06-05 04:10:48,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:48,558 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 166 transitions. [2021-06-05 04:10:48,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:10:48,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:48,558 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:48,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 04:10:48,773 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:48,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:48,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1028947268, now seen corresponding path program 15 times [2021-06-05 04:10:48,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:48,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065396945] [2021-06-05 04:10:48,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:48,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:48,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065396945] [2021-06-05 04:10:48,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065396945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:48,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504157054] [2021-06-05 04:10:48,841 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 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 04:10:48,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:10:48,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:48,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:10:48,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:49,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:49,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:10:49,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:10:49,086 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:49,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:49,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:49,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:49,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:49,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:10:49,128 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:49,143 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:10:49,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:49,143 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 04:10:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:49,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504157054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:49,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:49,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:10:49,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833857444] [2021-06-05 04:10:49,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:49,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:49,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:49,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:49,170 INFO L87 Difference]: Start difference. First operand 67 states and 166 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:49,446 INFO L93 Difference]: Finished difference Result 119 states and 261 transitions. [2021-06-05 04:10:49,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:10:49,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:10:49,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:49,447 INFO L225 Difference]: With dead ends: 119 [2021-06-05 04:10:49,447 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:10:49,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 198.9ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:10:49,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:10:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2021-06-05 04:10:49,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5) internal successors, (165), 66 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 04:10:49,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2021-06-05 04:10:49,449 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 15 [2021-06-05 04:10:49,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:49,449 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2021-06-05 04:10:49,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:49,449 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2021-06-05 04:10:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:10:49,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:49,450 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:49,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:49,666 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:49,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:49,666 INFO L82 PathProgramCache]: Analyzing trace with hash 681666040, now seen corresponding path program 16 times [2021-06-05 04:10:49,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:49,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847838631] [2021-06-05 04:10:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:49,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:49,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847838631] [2021-06-05 04:10:49,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847838631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:49,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793641575] [2021-06-05 04:10:49,734 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 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 04:10:49,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:10:49,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:49,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:10:49,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:49,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:49,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:10:49,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:10:49,969 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:49,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:49,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:49,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:49,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:49,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:10:50,009 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:50,021 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:10:50,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:50,022 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 04:10:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:50,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793641575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:50,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:50,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:10:50,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591217090] [2021-06-05 04:10:50,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:50,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:50,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:50,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:50,045 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:50,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:50,285 INFO L93 Difference]: Finished difference Result 98 states and 230 transitions. [2021-06-05 04:10:50,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:10:50,286 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:10:50,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:50,286 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:10:50,286 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 04:10:50,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:10:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 04:10:50,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 67. [2021-06-05 04:10:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5) internal successors, (165), 66 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 04:10:50,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2021-06-05 04:10:50,289 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 15 [2021-06-05 04:10:50,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:50,289 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2021-06-05 04:10:50,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2021-06-05 04:10:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:10:50,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:50,289 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:50,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-05 04:10:50,501 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:50,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:50,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1268567164, now seen corresponding path program 17 times [2021-06-05 04:10:50,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:50,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370551865] [2021-06-05 04:10:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:50,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:50,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370551865] [2021-06-05 04:10:50,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370551865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:50,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941845036] [2021-06-05 04:10:50,599 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:10:50,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:10:50,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:50,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:10:50,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:50,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:50,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:10:50,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:50,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:50,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:50,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 04:10:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:50,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941845036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:50,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:50,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:10:50,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680779103] [2021-06-05 04:10:50,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:50,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:50,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:50,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:50,823 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:50,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:50,971 INFO L93 Difference]: Finished difference Result 100 states and 238 transitions. [2021-06-05 04:10:50,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:10:50,971 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:10:50,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:50,972 INFO L225 Difference]: With dead ends: 100 [2021-06-05 04:10:50,972 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 04:10:50,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:10:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 04:10:50,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-06-05 04:10:50,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 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 04:10:50,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-06-05 04:10:50,975 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-06-05 04:10:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:50,975 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-06-05 04:10:50,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:50,976 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-06-05 04:10:50,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:10:50,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:50,976 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:51,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:51,192 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:51,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:51,192 INFO L82 PathProgramCache]: Analyzing trace with hash -409692634, now seen corresponding path program 18 times [2021-06-05 04:10:51,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:51,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132771920] [2021-06-05 04:10:51,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:51,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:51,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132771920] [2021-06-05 04:10:51,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132771920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:51,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823937624] [2021-06-05 04:10:51,250 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 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 04:10:51,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:10:51,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:51,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:10:51,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:51,488 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 44 [2021-06-05 04:10:51,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:51,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:10:51,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:10:51,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:51,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:51,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:51,594 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:51,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:51,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:10:51,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:51,645 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:10:51,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:51,645 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 04:10:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:51,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823937624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:51,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:51,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:10:51,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706884263] [2021-06-05 04:10:51,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:51,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:51,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:51,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:51,669 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:51,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:51,904 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2021-06-05 04:10:51,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:10:51,904 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:10:51,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:51,905 INFO L225 Difference]: With dead ends: 120 [2021-06-05 04:10:51,905 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 04:10:51,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:10:51,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 04:10:51,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2021-06-05 04:10:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 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 04:10:51,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-06-05 04:10:51,907 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-06-05 04:10:51,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:51,907 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-06-05 04:10:51,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:51,907 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-06-05 04:10:51,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:10:51,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:51,907 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:52,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 04:10:52,108 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:52,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:52,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1300920674, now seen corresponding path program 19 times [2021-06-05 04:10:52,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:52,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136716512] [2021-06-05 04:10:52,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:52,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:52,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:52,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136716512] [2021-06-05 04:10:52,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136716512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:52,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596578585] [2021-06-05 04:10:52,173 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 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 04:10:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:52,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:10:52,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:52,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:52,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:10:52,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:10:52,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:52,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:52,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:52,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:52,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:52,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:10:52,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:52,437 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:10:52,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:52,438 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 04:10:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:52,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596578585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:52,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:52,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:10:52,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324911539] [2021-06-05 04:10:52,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:52,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:52,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:52,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:52,462 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:52,715 INFO L93 Difference]: Finished difference Result 104 states and 252 transitions. [2021-06-05 04:10:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:10:52,715 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:10:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:52,716 INFO L225 Difference]: With dead ends: 104 [2021-06-05 04:10:52,716 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 04:10:52,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 253.5ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:10:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 04:10:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 76. [2021-06-05 04:10:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 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 04:10:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-06-05 04:10:52,718 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-06-05 04:10:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:52,718 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-06-05 04:10:52,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-06-05 04:10:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:10:52,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:52,718 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:52,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 04:10:52,929 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:52,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:52,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1504641626, now seen corresponding path program 20 times [2021-06-05 04:10:52,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:52,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147704046] [2021-06-05 04:10:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:52,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:52,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147704046] [2021-06-05 04:10:52,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147704046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:52,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79832847] [2021-06-05 04:10:52,994 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 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 04:10:53,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:10:53,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:53,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:10:53,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:53,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:53,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:10:53,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:10:53,290 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:53,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:53,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:53,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:53,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:53,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:10:53,325 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:53,337 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:10:53,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:53,338 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 04:10:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:53,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79832847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:53,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:53,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:10:53,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775531486] [2021-06-05 04:10:53,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:53,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:53,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:53,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:53,372 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:53,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:53,618 INFO L93 Difference]: Finished difference Result 121 states and 292 transitions. [2021-06-05 04:10:53,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:10:53,618 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:10:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:53,619 INFO L225 Difference]: With dead ends: 121 [2021-06-05 04:10:53,619 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 04:10:53,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:10:53,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 04:10:53,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2021-06-05 04:10:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 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 04:10:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-06-05 04:10:53,621 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-06-05 04:10:53,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:53,621 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-06-05 04:10:53,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-06-05 04:10:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:10:53,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:53,621 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:53,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 04:10:53,829 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:53,829 INFO L82 PathProgramCache]: Analyzing trace with hash 748457306, now seen corresponding path program 21 times [2021-06-05 04:10:53,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:53,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783649] [2021-06-05 04:10:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:53,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:53,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783649] [2021-06-05 04:10:53,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:53,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005117154] [2021-06-05 04:10:53,888 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 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 04:10:53,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:10:53,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:53,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:10:53,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:54,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:54,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:10:54,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:54,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:54,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:54,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 04:10:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:54,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005117154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:54,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:54,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:10:54,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51128210] [2021-06-05 04:10:54,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:54,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:54,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:54,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:54,077 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:54,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:54,242 INFO L93 Difference]: Finished difference Result 107 states and 266 transitions. [2021-06-05 04:10:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:10:54,242 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:10:54,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:54,243 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:10:54,243 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 04:10:54,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:10:54,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 04:10:54,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2021-06-05 04:10:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 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 04:10:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-06-05 04:10:54,245 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-06-05 04:10:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:54,245 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-06-05 04:10:54,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-06-05 04:10:54,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:10:54,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:54,245 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:54,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 04:10:54,461 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:54,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:54,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1607331836, now seen corresponding path program 22 times [2021-06-05 04:10:54,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:54,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469357533] [2021-06-05 04:10:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:54,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:54,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469357533] [2021-06-05 04:10:54,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469357533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:54,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121057720] [2021-06-05 04:10:54,527 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 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 04:10:54,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:10:54,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:54,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:10:54,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:54,773 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 2072 DAG size of output: 44 [2021-06-05 04:10:54,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:54,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:10:54,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:10:54,882 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:54,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:54,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:54,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:54,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:54,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:10:54,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:54,930 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:10:54,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:54,930 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 04:10:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:54,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121057720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:54,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:54,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:10:54,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247008441] [2021-06-05 04:10:54,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:54,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:54,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:54,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:54,953 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:55,224 INFO L93 Difference]: Finished difference Result 129 states and 314 transitions. [2021-06-05 04:10:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:10:55,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:10:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:55,225 INFO L225 Difference]: With dead ends: 129 [2021-06-05 04:10:55,225 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 04:10:55,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:10:55,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 04:10:55,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2021-06-05 04:10:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 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 04:10:55,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-06-05 04:10:55,227 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-06-05 04:10:55,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:55,227 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-06-05 04:10:55,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:55,227 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-06-05 04:10:55,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:10:55,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:55,227 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:55,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:55,437 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:55,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:55,437 INFO L82 PathProgramCache]: Analyzing trace with hash -977022152, now seen corresponding path program 23 times [2021-06-05 04:10:55,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:55,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146415030] [2021-06-05 04:10:55,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:55,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:55,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146415030] [2021-06-05 04:10:55,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146415030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:55,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183929333] [2021-06-05 04:10:55,499 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 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 04:10:55,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:10:55,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:55,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:10:55,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:56,506 WARN L205 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 2608 DAG size of output: 45 [2021-06-05 04:10:56,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:56,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:10:56,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:10:56,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:56,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:56,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:56,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:56,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:56,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:10:56,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:56,682 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:10:56,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:56,684 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 04:10:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:56,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183929333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:56,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:56,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:10:56,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872370855] [2021-06-05 04:10:56,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:56,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:56,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:56,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:56,707 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:56,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:56,910 INFO L93 Difference]: Finished difference Result 111 states and 280 transitions. [2021-06-05 04:10:56,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:10:56,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:10:56,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:56,910 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:10:56,911 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 04:10:56,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 218.2ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:10:56,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 04:10:56,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-06-05 04:10:56,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 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 04:10:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-06-05 04:10:56,912 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-06-05 04:10:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:56,913 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-06-05 04:10:56,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-06-05 04:10:56,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:10:56,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:56,913 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:57,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 04:10:57,121 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:57,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:57,121 INFO L82 PathProgramCache]: Analyzing trace with hash 512382844, now seen corresponding path program 24 times [2021-06-05 04:10:57,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:57,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015877658] [2021-06-05 04:10:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:57,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:57,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015877658] [2021-06-05 04:10:57,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015877658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:57,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24234417] [2021-06-05 04:10:57,183 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 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 04:10:57,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:10:57,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:57,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:10:57,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:57,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:57,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:10:57,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:10:57,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:57,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:57,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:57,432 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:57,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:57,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:10:57,466 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:57,479 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:10:57,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:57,480 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 04:10:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:57,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24234417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:57,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:57,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:10:57,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243374668] [2021-06-05 04:10:57,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:57,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:57,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:57,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:57,503 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:57,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:57,789 INFO L93 Difference]: Finished difference Result 125 states and 307 transitions. [2021-06-05 04:10:57,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:10:57,789 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:10:57,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:57,790 INFO L225 Difference]: With dead ends: 125 [2021-06-05 04:10:57,790 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 04:10:57,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:10:57,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 04:10:57,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 85. [2021-06-05 04:10:57,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 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 04:10:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-06-05 04:10:57,792 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-06-05 04:10:57,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:57,792 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-06-05 04:10:57,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:57,792 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-06-05 04:10:57,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:10:57,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:57,792 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:58,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 04:10:58,009 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:58,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:58,009 INFO L82 PathProgramCache]: Analyzing trace with hash -560702536, now seen corresponding path program 25 times [2021-06-05 04:10:58,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:58,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366422144] [2021-06-05 04:10:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:58,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:58,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366422144] [2021-06-05 04:10:58,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366422144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:58,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070329350] [2021-06-05 04:10:58,067 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 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 04:10:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:58,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:10:58,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:58,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:58,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:10:58,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:10:58,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:58,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:58,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:58,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:58,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:58,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:10:58,351 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:58,364 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:10:58,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:10:58,365 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 04:10:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:58,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070329350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:58,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:58,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:10:58,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663354694] [2021-06-05 04:10:58,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:58,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:58,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:58,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:58,387 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:58,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:58,712 INFO L93 Difference]: Finished difference Result 139 states and 341 transitions. [2021-06-05 04:10:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:10:58,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:10:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:58,712 INFO L225 Difference]: With dead ends: 139 [2021-06-05 04:10:58,712 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 04:10:58,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 333.8ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:10:58,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 04:10:58,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 85. [2021-06-05 04:10:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 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 04:10:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-06-05 04:10:58,715 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-06-05 04:10:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:58,715 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-06-05 04:10:58,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:58,715 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-06-05 04:10:58,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:10:58,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:58,715 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:58,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 04:10:58,929 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:58,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:58,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1148293564, now seen corresponding path program 26 times [2021-06-05 04:10:58,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:58,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614286139] [2021-06-05 04:10:58,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:58,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:58,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614286139] [2021-06-05 04:10:58,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614286139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:58,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387234661] [2021-06-05 04:10:58,995 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 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 04:10:59,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:10:59,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:59,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:10:59,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:59,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:59,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:10:59,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:59,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:59,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:59,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 04:10:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:59,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387234661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:59,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:59,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:10:59,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052903356] [2021-06-05 04:10:59,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:59,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:59,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:59,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:59,195 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:59,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:59,360 INFO L93 Difference]: Finished difference Result 117 states and 300 transitions. [2021-06-05 04:10:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:10:59,360 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:10:59,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:59,361 INFO L225 Difference]: With dead ends: 117 [2021-06-05 04:10:59,361 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 04:10:59,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:10:59,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 04:10:59,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2021-06-05 04:10:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 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 04:10:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-06-05 04:10:59,363 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-06-05 04:10:59,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:59,365 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-06-05 04:10:59,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:10:59,365 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-06-05 04:10:59,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:10:59,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:59,365 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:59,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-05 04:10:59,581 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:59,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:59,581 INFO L82 PathProgramCache]: Analyzing trace with hash -289419034, now seen corresponding path program 27 times [2021-06-05 04:10:59,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:59,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707016572] [2021-06-05 04:10:59,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:59,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:59,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707016572] [2021-06-05 04:10:59,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707016572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:59,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982824632] [2021-06-05 04:10:59,640 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 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 04:10:59,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:10:59,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:59,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:10:59,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:59,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:59,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:10:59,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:10:59,950 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:59,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:59,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:10:59,953 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:59,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:59,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:10:59,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:00,012 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:11:00,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:00,013 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 04:11:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:00,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982824632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:00,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:00,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:11:00,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311132390] [2021-06-05 04:11:00,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:11:00,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:00,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:11:00,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:11:00,036 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:11:00,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:00,310 INFO L93 Difference]: Finished difference Result 141 states and 356 transitions. [2021-06-05 04:11:00,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:11:00,310 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:11:00,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:00,311 INFO L225 Difference]: With dead ends: 141 [2021-06-05 04:11:00,311 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 04:11:00,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:11:00,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 04:11:00,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2021-06-05 04:11:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 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 04:11:00,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-06-05 04:11:00,313 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-06-05 04:11:00,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:00,313 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-06-05 04:11:00,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:11:00,313 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-06-05 04:11:00,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:11:00,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:00,314 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:00,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:00,518 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:00,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:00,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1421194274, now seen corresponding path program 28 times [2021-06-05 04:11:00,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:00,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244373332] [2021-06-05 04:11:00,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:00,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:00,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244373332] [2021-06-05 04:11:00,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244373332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:00,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905411639] [2021-06-05 04:11:00,573 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 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 04:11:00,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:11:00,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:00,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:11:00,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:00,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:00,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:11:00,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:00,822 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:11:00,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:00,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:11:00,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:00,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:00,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:11:00,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:00,871 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:11:00,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:00,872 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 04:11:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:00,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905411639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:00,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:00,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:11:00,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011163379] [2021-06-05 04:11:00,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:11:00,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:00,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:11:00,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:11:00,900 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:11:01,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:01,088 INFO L93 Difference]: Finished difference Result 128 states and 330 transitions. [2021-06-05 04:11:01,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:11:01,088 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:11:01,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:01,088 INFO L225 Difference]: With dead ends: 128 [2021-06-05 04:11:01,088 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 04:11:01,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 216.7ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:11:01,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 04:11:01,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-06-05 04:11:01,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 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 04:11:01,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-06-05 04:11:01,090 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-06-05 04:11:01,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:01,091 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-06-05 04:11:01,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:11:01,091 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-06-05 04:11:01,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:11:01,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:01,091 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:01,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:01,305 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1384368026, now seen corresponding path program 29 times [2021-06-05 04:11:01,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:01,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296511047] [2021-06-05 04:11:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:01,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:01,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296511047] [2021-06-05 04:11:01,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296511047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:01,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821899700] [2021-06-05 04:11:01,366 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 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 04:11:01,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:11:01,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:01,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:11:01,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:01,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:01,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:11:01,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:01,584 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:11:01,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:01,586 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:11:01,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:01,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:01,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:11:01,625 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:01,638 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:11:01,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:01,639 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 04:11:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:01,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821899700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:01,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:01,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:11:01,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72873893] [2021-06-05 04:11:01,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:11:01,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:01,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:11:01,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:11:01,661 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:11:01,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:01,911 INFO L93 Difference]: Finished difference Result 142 states and 360 transitions. [2021-06-05 04:11:01,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:11:01,912 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:11:01,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:01,912 INFO L225 Difference]: With dead ends: 142 [2021-06-05 04:11:01,912 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 04:11:01,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 280.3ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:11:01,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 04:11:01,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2021-06-05 04:11:01,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 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 04:11:01,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-06-05 04:11:01,915 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-06-05 04:11:01,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:01,915 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-06-05 04:11:01,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:11:01,915 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-06-05 04:11:01,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:11:01,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:01,915 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:02,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:02,129 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:02,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:02,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1837513890, now seen corresponding path program 30 times [2021-06-05 04:11:02,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:02,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961440770] [2021-06-05 04:11:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:02,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:02,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961440770] [2021-06-05 04:11:02,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961440770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:02,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304141169] [2021-06-05 04:11:02,219 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 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 04:11:02,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:11:02,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:02,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:11:02,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:02,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:02,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:11:02,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:02,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:11:02,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:02,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:11:02,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:02,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:02,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:11:02,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:02,519 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:11:02,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:02,520 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 04:11:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:02,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304141169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:02,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:02,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:11:02,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509870823] [2021-06-05 04:11:02,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:11:02,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:02,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:11:02,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:11:02,542 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:11:02,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:02,877 INFO L93 Difference]: Finished difference Result 154 states and 387 transitions. [2021-06-05 04:11:02,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:11:02,877 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:11:02,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:02,878 INFO L225 Difference]: With dead ends: 154 [2021-06-05 04:11:02,878 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 04:11:02,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 354.1ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:11:02,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 04:11:02,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 94. [2021-06-05 04:11:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 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 04:11:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-06-05 04:11:02,880 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-06-05 04:11:02,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:02,880 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-06-05 04:11:02,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:11:02,880 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-06-05 04:11:02,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:11:02,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:02,881 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:03,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:03,089 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:03,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:03,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1363361818, now seen corresponding path program 31 times [2021-06-05 04:11:03,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:03,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261995474] [2021-06-05 04:11:03,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:03,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:03,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261995474] [2021-06-05 04:11:03,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261995474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:03,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925098212] [2021-06-05 04:11:03,153 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 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 04:11:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:03,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:11:03,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:03,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:03,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 04:11:03,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:03,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:11:03,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:03,428 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:11:03,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:03,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:03,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:11:03,461 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:03,474 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 04:11:03,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:03,475 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 04:11:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:03,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925098212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:03,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:03,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 04:11:03,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315943940] [2021-06-05 04:11:03,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:11:03,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:03,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:11:03,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:11:03,505 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) 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 04:11:03,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:03,864 INFO L93 Difference]: Finished difference Result 159 states and 400 transitions. [2021-06-05 04:11:03,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:11:03,864 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 15 [2021-06-05 04:11:03,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:03,865 INFO L225 Difference]: With dead ends: 159 [2021-06-05 04:11:03,865 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 04:11:03,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 377.6ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:11:03,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 04:11:03,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 96. [2021-06-05 04:11:03,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.7578947368421054) internal successors, (262), 95 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 04:11:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 262 transitions. [2021-06-05 04:11:03,867 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 262 transitions. Word has length 15 [2021-06-05 04:11:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:03,867 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 262 transitions. [2021-06-05 04:11:03,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) 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 04:11:03,867 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 262 transitions. [2021-06-05 04:11:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:03,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:03,868 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:04,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable693 [2021-06-05 04:11:04,084 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:04,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2020244300, now seen corresponding path program 32 times [2021-06-05 04:11:04,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:04,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81517734] [2021-06-05 04:11:04,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:04,174 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 04:11:04,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:04,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81517734] [2021-06-05 04:11:04,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81517734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:04,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444250060] [2021-06-05 04:11:04,175 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 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 04:11:04,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:11:04,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:04,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:04,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:04,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:04,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:04,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:04,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:04,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:11:04,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:11:04,414 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 04:11:04,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444250060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:04,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:04,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:04,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942805673] [2021-06-05 04:11:04,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:04,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:04,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:04,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:04,414 INFO L87 Difference]: Start difference. First operand 96 states and 262 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:04,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:04,628 INFO L93 Difference]: Finished difference Result 123 states and 314 transitions. [2021-06-05 04:11:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:11:04,630 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:04,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:04,630 INFO L225 Difference]: With dead ends: 123 [2021-06-05 04:11:04,630 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 04:11:04,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:11:04,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 04:11:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-06-05 04:11:04,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.7346938775510203) internal successors, (268), 98 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 04:11:04,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 268 transitions. [2021-06-05 04:11:04,633 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 268 transitions. Word has length 16 [2021-06-05 04:11:04,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:04,633 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 268 transitions. [2021-06-05 04:11:04,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:04,633 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 268 transitions. [2021-06-05 04:11:04,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:04,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:04,633 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:04,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:04,849 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:04,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:04,849 INFO L82 PathProgramCache]: Analyzing trace with hash 353840502, now seen corresponding path program 33 times [2021-06-05 04:11:04,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:04,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495066690] [2021-06-05 04:11:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:04,936 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 04:11:04,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:04,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495066690] [2021-06-05 04:11:04,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495066690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:04,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313878333] [2021-06-05 04:11:04,937 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 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 04:11:04,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:11:04,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:04,960 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:04,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:05,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:05,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:05,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:05,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:05,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:11:05,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:11:05,196 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 04:11:05,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313878333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:05,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:05,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:05,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526492067] [2021-06-05 04:11:05,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:05,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:05,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:05,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:05,197 INFO L87 Difference]: Start difference. First operand 99 states and 268 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:05,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:05,483 INFO L93 Difference]: Finished difference Result 118 states and 307 transitions. [2021-06-05 04:11:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:11:05,483 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:05,483 INFO L225 Difference]: With dead ends: 118 [2021-06-05 04:11:05,483 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 04:11:05,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 254.9ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:11:05,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 04:11:05,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2021-06-05 04:11:05,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.727272727272727) internal successors, (270), 99 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 270 transitions. [2021-06-05 04:11:05,489 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 270 transitions. Word has length 16 [2021-06-05 04:11:05,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:05,489 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 270 transitions. [2021-06-05 04:11:05,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:05,489 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 270 transitions. [2021-06-05 04:11:05,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:05,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:05,490 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:05,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable757 [2021-06-05 04:11:05,701 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:05,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:05,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1212715032, now seen corresponding path program 34 times [2021-06-05 04:11:05,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:05,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435143714] [2021-06-05 04:11:05,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:05,794 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 04:11:05,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:05,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435143714] [2021-06-05 04:11:05,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435143714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:05,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510812326] [2021-06-05 04:11:05,795 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 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 04:11:05,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:11:05,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:05,816 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:05,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:05,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:05,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:06,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:06,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:06,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:06,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:06,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:06,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:06,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:06,553 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:06,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:06,553 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:06,577 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 04:11:06,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510812326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:06,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:06,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:06,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423480298] [2021-06-05 04:11:06,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:06,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:06,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:06,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:06,579 INFO L87 Difference]: Start difference. First operand 100 states and 270 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:06,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:06,805 INFO L93 Difference]: Finished difference Result 140 states and 346 transitions. [2021-06-05 04:11:06,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:11:06,805 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:06,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:06,806 INFO L225 Difference]: With dead ends: 140 [2021-06-05 04:11:06,806 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 04:11:06,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:11:06,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 04:11:06,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2021-06-05 04:11:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.727272727272727) internal successors, (270), 99 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 270 transitions. [2021-06-05 04:11:06,808 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 270 transitions. Word has length 16 [2021-06-05 04:11:06,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:06,808 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 270 transitions. [2021-06-05 04:11:06,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 270 transitions. [2021-06-05 04:11:06,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:06,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:06,808 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:07,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:07,024 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:07,025 INFO L82 PathProgramCache]: Analyzing trace with hash 865094314, now seen corresponding path program 35 times [2021-06-05 04:11:07,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:07,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725356133] [2021-06-05 04:11:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:07,099 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 04:11:07,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:07,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725356133] [2021-06-05 04:11:07,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725356133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:07,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589326051] [2021-06-05 04:11:07,100 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 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 04:11:07,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:11:07,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:07,123 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:07,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:07,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:07,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:07,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:07,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:07,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:07,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:07,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:07,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:08,368 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 234 [2021-06-05 04:11:09,044 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:09,070 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:09,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:09,071 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:09,095 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 04:11:09,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589326051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:09,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:09,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 04:11:09,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647190658] [2021-06-05 04:11:09,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:11:09,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:09,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:11:09,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:11:09,097 INFO L87 Difference]: Start difference. First operand 100 states and 270 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 04:11:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:09,450 INFO L93 Difference]: Finished difference Result 156 states and 373 transitions. [2021-06-05 04:11:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:11:09,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-06-05 04:11:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:09,451 INFO L225 Difference]: With dead ends: 156 [2021-06-05 04:11:09,451 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:11:09,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:11:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:11:09,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2021-06-05 04:11:09,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.7254901960784315) internal successors, (278), 102 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 04:11:09,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 278 transitions. [2021-06-05 04:11:09,453 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 278 transitions. Word has length 16 [2021-06-05 04:11:09,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:09,453 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 278 transitions. [2021-06-05 04:11:09,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 04:11:09,453 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 278 transitions. [2021-06-05 04:11:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:09,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:09,453 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:09,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-06-05 04:11:09,654 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:09,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:09,654 INFO L82 PathProgramCache]: Analyzing trace with hash -770929815, now seen corresponding path program 36 times [2021-06-05 04:11:09,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:09,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29070921] [2021-06-05 04:11:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:09,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:09,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29070921] [2021-06-05 04:11:09,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29070921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:09,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072998412] [2021-06-05 04:11:09,687 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 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 04:11:09,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:11:09,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:09,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:11:09,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:09,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072998412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:09,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:09,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:11:09,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175107634] [2021-06-05 04:11:09,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:11:09,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:09,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:11:09,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:11:09,735 INFO L87 Difference]: Start difference. First operand 103 states and 278 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 04:11:09,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:09,776 INFO L93 Difference]: Finished difference Result 216 states and 471 transitions. [2021-06-05 04:11:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:11:09,776 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 16 [2021-06-05 04:11:09,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:09,777 INFO L225 Difference]: With dead ends: 216 [2021-06-05 04:11:09,777 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 04:11:09,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:11:09,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 04:11:09,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 109. [2021-06-05 04:11:09,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.787037037037037) internal successors, (301), 108 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 04:11:09,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 301 transitions. [2021-06-05 04:11:09,779 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 301 transitions. Word has length 16 [2021-06-05 04:11:09,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:09,779 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 301 transitions. [2021-06-05 04:11:09,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 04:11:09,779 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 301 transitions. [2021-06-05 04:11:09,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:09,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:09,780 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:09,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-06-05 04:11:09,996 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:09,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:09,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1085138890, now seen corresponding path program 37 times [2021-06-05 04:11:09,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:09,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799357970] [2021-06-05 04:11:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:10,145 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 04:11:10,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:10,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799357970] [2021-06-05 04:11:10,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799357970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:10,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251335706] [2021-06-05 04:11:10,146 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 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 04:11:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:10,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:10,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:10,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:10,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:10,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:10,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:10,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:11:10,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:11:10,458 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 04:11:10,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251335706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:10,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:10,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:10,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471644293] [2021-06-05 04:11:10,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:10,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:10,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:10,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:10,460 INFO L87 Difference]: Start difference. First operand 109 states and 301 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:10,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:10,744 INFO L93 Difference]: Finished difference Result 126 states and 330 transitions. [2021-06-05 04:11:10,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:11:10,744 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:10,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:10,745 INFO L225 Difference]: With dead ends: 126 [2021-06-05 04:11:10,745 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 04:11:10,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 345.4ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:11:10,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 04:11:10,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2021-06-05 04:11:10,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 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 04:11:10,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-06-05 04:11:10,747 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-06-05 04:11:10,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:10,747 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-06-05 04:11:10,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:10,747 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-06-05 04:11:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:10,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:10,747 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:10,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1245 [2021-06-05 04:11:10,957 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:10,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:10,957 INFO L82 PathProgramCache]: Analyzing trace with hash -226264360, now seen corresponding path program 38 times [2021-06-05 04:11:10,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:10,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436338054] [2021-06-05 04:11:10,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:11,092 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 04:11:11,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:11,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436338054] [2021-06-05 04:11:11,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436338054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:11,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166010452] [2021-06-05 04:11:11,092 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 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 04:11:11,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:11:11,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:11,114 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:11,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:11,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:11,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:11,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:11,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:11,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:11,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:11,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:11,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:12,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:12,131 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:12,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:12,132 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:12,157 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 04:11:12,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166010452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:12,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:12,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:12,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282396283] [2021-06-05 04:11:12,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:12,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:12,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:12,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:12,158 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:12,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:12,434 INFO L93 Difference]: Finished difference Result 150 states and 373 transitions. [2021-06-05 04:11:12,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:11:12,435 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:12,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:12,435 INFO L225 Difference]: With dead ends: 150 [2021-06-05 04:11:12,435 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 04:11:12,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 315.5ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:11:12,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 04:11:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 109. [2021-06-05 04:11:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 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 04:11:12,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-06-05 04:11:12,437 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-06-05 04:11:12,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:12,438 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-06-05 04:11:12,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-06-05 04:11:12,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:12,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:12,438 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:12,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1281 [2021-06-05 04:11:12,645 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:12,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1484348948, now seen corresponding path program 39 times [2021-06-05 04:11:12,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:12,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487905957] [2021-06-05 04:11:12,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:12,740 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 04:11:12,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:12,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487905957] [2021-06-05 04:11:12,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487905957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:12,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70503650] [2021-06-05 04:11:12,741 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 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 04:11:12,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:11:12,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:12,769 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:12,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:12,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:12,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:13,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:13,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:13,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:13,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:13,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:13,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:14,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:14,039 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:14,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:14,039 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:14,064 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 04:11:14,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70503650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:14,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:14,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:14,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056674686] [2021-06-05 04:11:14,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:14,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:14,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:14,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:14,065 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:14,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:14,428 INFO L93 Difference]: Finished difference Result 171 states and 410 transitions. [2021-06-05 04:11:14,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:11:14,429 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:14,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:14,429 INFO L225 Difference]: With dead ends: 171 [2021-06-05 04:11:14,429 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 04:11:14,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 295.6ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:11:14,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 04:11:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 109. [2021-06-05 04:11:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 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 04:11:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-06-05 04:11:14,432 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-06-05 04:11:14,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:14,432 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-06-05 04:11:14,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:14,432 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-06-05 04:11:14,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:14,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:14,432 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:14,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-06-05 04:11:14,648 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:14,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:14,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1321213352, now seen corresponding path program 40 times [2021-06-05 04:11:14,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:14,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437592809] [2021-06-05 04:11:14,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:14,739 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 04:11:14,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:14,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437592809] [2021-06-05 04:11:14,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437592809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:14,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231609665] [2021-06-05 04:11:14,740 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 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 04:11:14,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:11:14,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:14,778 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:14,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:14,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:14,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:15,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:15,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:15,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:15,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:15,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:15,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:15,906 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 279 [2021-06-05 04:11:16,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:16,715 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:16,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:16,716 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:16,741 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 04:11:16,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231609665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:16,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:16,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:16,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638939116] [2021-06-05 04:11:16,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:16,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:16,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:16,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:16,742 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:17,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:17,168 INFO L93 Difference]: Finished difference Result 188 states and 439 transitions. [2021-06-05 04:11:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:11:17,168 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:17,169 INFO L225 Difference]: With dead ends: 188 [2021-06-05 04:11:17,169 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 04:11:17,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 410.0ms TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:11:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 04:11:17,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 111. [2021-06-05 04:11:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7636363636363637) internal successors, (304), 110 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 04:11:17,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 304 transitions. [2021-06-05 04:11:17,171 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 304 transitions. Word has length 16 [2021-06-05 04:11:17,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:17,171 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 304 transitions. [2021-06-05 04:11:17,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 304 transitions. [2021-06-05 04:11:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:17,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:17,172 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:17,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1695 [2021-06-05 04:11:17,388 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:17,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:17,388 INFO L82 PathProgramCache]: Analyzing trace with hash 2082432313, now seen corresponding path program 41 times [2021-06-05 04:11:17,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:17,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67158010] [2021-06-05 04:11:17,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:17,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:17,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67158010] [2021-06-05 04:11:17,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67158010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:17,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959556448] [2021-06-05 04:11:17,414 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 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 04:11:17,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:11:17,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:17,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:11:17,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:17,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959556448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:17,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:17,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:11:17,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019640401] [2021-06-05 04:11:17,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:11:17,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:17,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:11:17,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:11:17,504 INFO L87 Difference]: Start difference. First operand 111 states and 304 transitions. Second operand has 10 states, 10 states have (on average 1.9) 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 04:11:17,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:17,560 INFO L93 Difference]: Finished difference Result 260 states and 558 transitions. [2021-06-05 04:11:17,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:11:17,560 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) 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 16 [2021-06-05 04:11:17,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:17,561 INFO L225 Difference]: With dead ends: 260 [2021-06-05 04:11:17,561 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 04:11:17,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:11:17,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 04:11:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 121. [2021-06-05 04:11:17,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.825) internal successors, (339), 120 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 04:11:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 339 transitions. [2021-06-05 04:11:17,564 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 339 transitions. Word has length 16 [2021-06-05 04:11:17,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:17,564 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 339 transitions. [2021-06-05 04:11:17,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) 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 04:11:17,564 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 339 transitions. [2021-06-05 04:11:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:17,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:17,564 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:17,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1983 [2021-06-05 04:11:17,768 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:17,768 INFO L82 PathProgramCache]: Analyzing trace with hash 931885580, now seen corresponding path program 42 times [2021-06-05 04:11:17,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:17,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567256761] [2021-06-05 04:11:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:17,904 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 04:11:17,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:17,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567256761] [2021-06-05 04:11:17,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567256761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:17,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066828370] [2021-06-05 04:11:17,904 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 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 04:11:17,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:11:17,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:17,946 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:17,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:18,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:18,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:18,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:18,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:18,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:11:18,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:11:18,161 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 04:11:18,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066828370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:18,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:18,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:18,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631587442] [2021-06-05 04:11:18,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:18,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:18,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:18,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:18,162 INFO L87 Difference]: Start difference. First operand 121 states and 339 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:18,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:18,423 INFO L93 Difference]: Finished difference Result 136 states and 365 transitions. [2021-06-05 04:11:18,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:11:18,423 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:18,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:18,424 INFO L225 Difference]: With dead ends: 136 [2021-06-05 04:11:18,424 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 04:11:18,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 328.1ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:11:18,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 04:11:18,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2021-06-05 04:11:18,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 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 04:11:18,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-06-05 04:11:18,426 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-06-05 04:11:18,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:18,426 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-06-05 04:11:18,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:18,426 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-06-05 04:11:18,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:18,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:18,426 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:18,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1984,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:18,641 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:18,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:18,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1790760110, now seen corresponding path program 43 times [2021-06-05 04:11:18,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:18,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001045147] [2021-06-05 04:11:18,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:18,781 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 04:11:18,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:18,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001045147] [2021-06-05 04:11:18,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001045147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:18,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525446871] [2021-06-05 04:11:18,782 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 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 04:11:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:18,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:18,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:18,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:18,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:18,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:19,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:19,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:19,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:19,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:19,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:19,816 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 227 [2021-06-05 04:11:20,831 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 295 [2021-06-05 04:11:20,959 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 295 [2021-06-05 04:11:21,100 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 299 [2021-06-05 04:11:21,494 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:21,514 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:21,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:21,515 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:21,540 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 04:11:21,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525446871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:21,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:21,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:21,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935149199] [2021-06-05 04:11:21,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:21,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:21,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:21,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:21,541 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:21,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:21,865 INFO L93 Difference]: Finished difference Result 163 states and 416 transitions. [2021-06-05 04:11:21,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:11:21,866 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:21,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:21,866 INFO L225 Difference]: With dead ends: 163 [2021-06-05 04:11:21,866 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 04:11:21,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 336.0ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:11:21,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 04:11:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 121. [2021-06-05 04:11:21,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 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 04:11:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-06-05 04:11:21,869 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-06-05 04:11:21,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:21,869 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-06-05 04:11:21,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-06-05 04:11:21,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:21,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:21,869 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:22,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2005 [2021-06-05 04:11:22,073 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:22,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:22,073 INFO L82 PathProgramCache]: Analyzing trace with hash -793593878, now seen corresponding path program 44 times [2021-06-05 04:11:22,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:22,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948910836] [2021-06-05 04:11:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:22,166 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 04:11:22,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:22,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948910836] [2021-06-05 04:11:22,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948910836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:22,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272958922] [2021-06-05 04:11:22,167 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 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 04:11:22,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:11:22,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:22,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:22,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:22,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:22,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:22,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:22,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:22,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:22,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:22,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:22,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:23,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:23,626 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:23,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:23,627 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:23,651 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 04:11:23,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272958922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:23,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:23,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:23,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305273242] [2021-06-05 04:11:23,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:23,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:23,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:23,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:23,652 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:24,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:24,073 INFO L93 Difference]: Finished difference Result 192 states and 470 transitions. [2021-06-05 04:11:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:11:24,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:24,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:24,074 INFO L225 Difference]: With dead ends: 192 [2021-06-05 04:11:24,074 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 04:11:24,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 346.3ms TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:11:24,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 04:11:24,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2021-06-05 04:11:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 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 04:11:24,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-06-05 04:11:24,076 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-06-05 04:11:24,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:24,076 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-06-05 04:11:24,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:24,076 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-06-05 04:11:24,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:24,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:24,077 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:24,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2448,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:24,277 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:24,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:24,277 INFO L82 PathProgramCache]: Analyzing trace with hash 695811118, now seen corresponding path program 45 times [2021-06-05 04:11:24,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:24,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413646754] [2021-06-05 04:11:24,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:24,342 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 04:11:24,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:24,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413646754] [2021-06-05 04:11:24,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413646754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:24,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266211140] [2021-06-05 04:11:24,343 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 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 04:11:24,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:11:24,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:24,366 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:24,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:24,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:24,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:24,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:24,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:24,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:24,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:24,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:24,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:25,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:25,244 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:25,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:25,245 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:25,277 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 04:11:25,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266211140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:25,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:25,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:25,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574202630] [2021-06-05 04:11:25,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:25,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:25,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:25,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:25,278 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:25,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:25,724 INFO L93 Difference]: Finished difference Result 205 states and 493 transitions. [2021-06-05 04:11:25,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:11:25,725 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:25,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:25,725 INFO L225 Difference]: With dead ends: 205 [2021-06-05 04:11:25,725 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 04:11:25,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 424.4ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:11:25,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 04:11:25,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 121. [2021-06-05 04:11:25,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 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 04:11:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-06-05 04:11:25,728 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-06-05 04:11:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:25,728 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-06-05 04:11:25,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-06-05 04:11:25,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:25,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:25,728 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:25,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2691 [2021-06-05 04:11:25,944 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:25,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:25,944 INFO L82 PathProgramCache]: Analyzing trace with hash -377274262, now seen corresponding path program 46 times [2021-06-05 04:11:25,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:25,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667320546] [2021-06-05 04:11:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:26,014 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 04:11:26,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:26,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667320546] [2021-06-05 04:11:26,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667320546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:26,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913840954] [2021-06-05 04:11:26,014 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 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 04:11:26,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:11:26,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:26,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:26,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:26,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:26,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:26,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:26,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:26,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:26,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:26,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:26,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:27,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:27,744 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:27,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:27,745 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:27,769 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 04:11:27,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913840954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:27,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:27,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:27,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590808532] [2021-06-05 04:11:27,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:27,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:27,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:27,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:27,770 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:28,168 INFO L93 Difference]: Finished difference Result 165 states and 407 transitions. [2021-06-05 04:11:28,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:11:28,168 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:28,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:28,169 INFO L225 Difference]: With dead ends: 165 [2021-06-05 04:11:28,169 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 04:11:28,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 468.7ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:11:28,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 04:11:28,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 123. [2021-06-05 04:11:28,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.7868852459016393) internal successors, (340), 122 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 04:11:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 340 transitions. [2021-06-05 04:11:28,171 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 340 transitions. Word has length 16 [2021-06-05 04:11:28,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:28,171 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 340 transitions. [2021-06-05 04:11:28,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:28,171 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 340 transitions. [2021-06-05 04:11:28,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:28,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:28,172 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:28,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2866,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:28,372 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:28,372 INFO L82 PathProgramCache]: Analyzing trace with hash 342345065, now seen corresponding path program 47 times [2021-06-05 04:11:28,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:28,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654845632] [2021-06-05 04:11:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:28,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:28,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654845632] [2021-06-05 04:11:28,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654845632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:28,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132663263] [2021-06-05 04:11:28,403 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 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 04:11:28,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:11:28,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:28,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:11:28,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:28,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132663263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:28,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:28,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:11:28,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846240192] [2021-06-05 04:11:28,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:11:28,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:28,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:11:28,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:11:28,459 INFO L87 Difference]: Start difference. First operand 123 states and 340 transitions. Second operand has 10 states, 10 states have (on average 1.9) 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 04:11:28,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:28,541 INFO L93 Difference]: Finished difference Result 247 states and 556 transitions. [2021-06-05 04:11:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:11:28,542 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) 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 16 [2021-06-05 04:11:28,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:28,542 INFO L225 Difference]: With dead ends: 247 [2021-06-05 04:11:28,542 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 04:11:28,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:11:28,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 04:11:28,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 134. [2021-06-05 04:11:28,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.827067669172932) internal successors, (376), 133 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:28,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 376 transitions. [2021-06-05 04:11:28,545 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 376 transitions. Word has length 16 [2021-06-05 04:11:28,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:28,545 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 376 transitions. [2021-06-05 04:11:28,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) 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 04:11:28,545 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 376 transitions. [2021-06-05 04:11:28,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:28,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:28,545 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:28,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3123,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:28,753 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:28,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:28,753 INFO L82 PathProgramCache]: Analyzing trace with hash -964865290, now seen corresponding path program 48 times [2021-06-05 04:11:28,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:28,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351495717] [2021-06-05 04:11:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:28,897 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 04:11:28,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:28,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351495717] [2021-06-05 04:11:28,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351495717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:28,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928483641] [2021-06-05 04:11:28,898 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 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 04:11:28,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:11:28,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:28,970 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:28,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:29,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:29,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:29,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:29,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:29,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:11:29,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:11:29,160 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 04:11:29,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928483641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:29,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:29,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:29,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726719935] [2021-06-05 04:11:29,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:29,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:29,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:29,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:29,161 INFO L87 Difference]: Start difference. First operand 134 states and 376 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:29,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:29,416 INFO L93 Difference]: Finished difference Result 150 states and 406 transitions. [2021-06-05 04:11:29,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:11:29,416 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:29,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:29,417 INFO L225 Difference]: With dead ends: 150 [2021-06-05 04:11:29,417 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 04:11:29,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 332.0ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:11:29,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 04:11:29,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2021-06-05 04:11:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-06-05 04:11:29,420 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-06-05 04:11:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:29,420 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-06-05 04:11:29,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-06-05 04:11:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:29,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:29,420 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:29,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3124,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:29,636 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:29,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:29,636 INFO L82 PathProgramCache]: Analyzing trace with hash -105990760, now seen corresponding path program 49 times [2021-06-05 04:11:29,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:29,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913019120] [2021-06-05 04:11:29,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:29,769 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 04:11:29,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:29,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913019120] [2021-06-05 04:11:29,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913019120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:29,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880464573] [2021-06-05 04:11:29,769 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 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 04:11:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:29,793 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:29,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:29,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:29,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:29,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:30,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:30,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:30,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:30,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:30,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:31,474 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 285 [2021-06-05 04:11:31,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:31,754 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:31,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:31,755 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:31,779 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 04:11:31,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880464573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:31,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:31,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:31,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797127940] [2021-06-05 04:11:31,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:31,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:31,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:31,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:31,780 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:32,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:32,131 INFO L93 Difference]: Finished difference Result 179 states and 464 transitions. [2021-06-05 04:11:32,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:11:32,131 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:32,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:32,132 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:11:32,132 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 04:11:32,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:11:32,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 04:11:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-06-05 04:11:32,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:32,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-06-05 04:11:32,134 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-06-05 04:11:32,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:32,134 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-06-05 04:11:32,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:32,134 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-06-05 04:11:32,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:32,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:32,135 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:32,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3143 [2021-06-05 04:11:32,343 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:32,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:32,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1604622548, now seen corresponding path program 50 times [2021-06-05 04:11:32,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:32,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235795916] [2021-06-05 04:11:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:32,444 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 04:11:32,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:32,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235795916] [2021-06-05 04:11:32,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235795916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:32,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027000181] [2021-06-05 04:11:32,445 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 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 04:11:32,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:11:32,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:32,469 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:32,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:32,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:32,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:32,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:32,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:32,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:32,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:32,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:32,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:33,674 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:33,694 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:33,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:33,695 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:33,721 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 04:11:33,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027000181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:33,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:33,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:33,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903143478] [2021-06-05 04:11:33,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:33,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:33,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:33,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:33,722 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:34,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:34,117 INFO L93 Difference]: Finished difference Result 203 states and 504 transitions. [2021-06-05 04:11:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:11:34,117 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:34,118 INFO L225 Difference]: With dead ends: 203 [2021-06-05 04:11:34,118 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 04:11:34,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 359.7ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:11:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 04:11:34,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 134. [2021-06-05 04:11:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-06-05 04:11:34,120 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-06-05 04:11:34,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:34,121 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-06-05 04:11:34,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:34,121 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-06-05 04:11:34,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:34,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:34,121 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:34,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:34,329 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:34,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:34,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1200939752, now seen corresponding path program 51 times [2021-06-05 04:11:34,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:34,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156186083] [2021-06-05 04:11:34,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:34,408 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 04:11:34,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:34,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156186083] [2021-06-05 04:11:34,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156186083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:34,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349456777] [2021-06-05 04:11:34,408 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 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 04:11:34,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:11:34,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:34,431 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:34,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:34,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:34,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:34,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:34,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:34,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:34,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:34,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:34,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:35,780 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:35,801 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:35,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:35,802 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:35,830 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 04:11:35,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349456777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:35,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:35,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:35,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816630068] [2021-06-05 04:11:35,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:35,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:35,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:35,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:35,831 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:36,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:36,397 INFO L93 Difference]: Finished difference Result 226 states and 546 transitions. [2021-06-05 04:11:36,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:11:36,397 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:36,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:36,398 INFO L225 Difference]: With dead ends: 226 [2021-06-05 04:11:36,398 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 04:11:36,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 500.9ms TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:11:36,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 04:11:36,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 134. [2021-06-05 04:11:36,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:36,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-06-05 04:11:36,400 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-06-05 04:11:36,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:36,400 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-06-05 04:11:36,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:36,400 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-06-05 04:11:36,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:36,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:36,401 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:36,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3690 [2021-06-05 04:11:36,616 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:36,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:36,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2020942164, now seen corresponding path program 52 times [2021-06-05 04:11:36,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:36,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988214876] [2021-06-05 04:11:36,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:36,687 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 04:11:36,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:36,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988214876] [2021-06-05 04:11:36,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988214876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:36,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733842173] [2021-06-05 04:11:36,687 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 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 04:11:36,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:11:36,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:36,709 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:36,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:36,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:36,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:36,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:37,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:37,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:37,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:37,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:37,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:37,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:37,642 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:37,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:37,643 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:37,669 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 04:11:37,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733842173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:37,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:37,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:37,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554867775] [2021-06-05 04:11:37,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:37,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:37,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:37,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:37,670 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:38,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:38,072 INFO L93 Difference]: Finished difference Result 186 states and 456 transitions. [2021-06-05 04:11:38,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:11:38,072 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:38,073 INFO L225 Difference]: With dead ends: 186 [2021-06-05 04:11:38,073 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 04:11:38,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 478.6ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:11:38,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 04:11:38,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 134. [2021-06-05 04:11:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:38,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-06-05 04:11:38,075 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-06-05 04:11:38,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:38,075 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-06-05 04:11:38,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:38,075 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-06-05 04:11:38,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:38,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:38,076 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:38,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3935 [2021-06-05 04:11:38,293 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:38,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:38,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1179933544, now seen corresponding path program 53 times [2021-06-05 04:11:38,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:38,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865169143] [2021-06-05 04:11:38,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:38,363 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 04:11:38,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:38,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865169143] [2021-06-05 04:11:38,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865169143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:38,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221250044] [2021-06-05 04:11:38,363 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:38,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:11:38,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:38,386 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:38,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:38,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:38,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:38,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:38,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:38,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:38,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:38,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:38,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:39,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:39,492 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:39,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:39,492 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:39,518 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 04:11:39,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221250044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:39,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:39,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:39,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396788534] [2021-06-05 04:11:39,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:39,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:39,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:39,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:39,519 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:39,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:40,000 INFO L93 Difference]: Finished difference Result 186 states and 464 transitions. [2021-06-05 04:11:40,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:11:40,000 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:40,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:40,001 INFO L225 Difference]: With dead ends: 186 [2021-06-05 04:11:40,001 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 04:11:40,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 582.0ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:11:40,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 04:11:40,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 136. [2021-06-05 04:11:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.8) internal successors, (378), 135 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 04:11:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 378 transitions. [2021-06-05 04:11:40,003 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 378 transitions. Word has length 16 [2021-06-05 04:11:40,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:40,003 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 378 transitions. [2021-06-05 04:11:40,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 378 transitions. [2021-06-05 04:11:40,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:40,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:40,003 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:40,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-06-05 04:11:40,204 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:40,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:40,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2060752071, now seen corresponding path program 54 times [2021-06-05 04:11:40,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:40,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741386718] [2021-06-05 04:11:40,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:40,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:40,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741386718] [2021-06-05 04:11:40,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741386718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:40,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908223549] [2021-06-05 04:11:40,233 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 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 04:11:40,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:11:40,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:40,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:11:40,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:40,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908223549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:40,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:40,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:11:40,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343637042] [2021-06-05 04:11:40,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:11:40,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:40,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:11:40,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:11:40,283 INFO L87 Difference]: Start difference. First operand 136 states and 378 transitions. Second operand has 10 states, 10 states have (on average 1.9) 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 04:11:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:40,388 INFO L93 Difference]: Finished difference Result 245 states and 574 transitions. [2021-06-05 04:11:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:11:40,388 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) 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 16 [2021-06-05 04:11:40,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:40,389 INFO L225 Difference]: With dead ends: 245 [2021-06-05 04:11:40,389 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 04:11:40,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:40,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 04:11:40,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 144. [2021-06-05 04:11:40,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.8181818181818183) internal successors, (403), 143 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:40,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 403 transitions. [2021-06-05 04:11:40,391 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 403 transitions. Word has length 16 [2021-06-05 04:11:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:40,391 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 403 transitions. [2021-06-05 04:11:40,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) 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 04:11:40,392 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 403 transitions. [2021-06-05 04:11:40,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:40,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:40,392 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:40,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4302,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:40,608 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:40,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:40,608 INFO L82 PathProgramCache]: Analyzing trace with hash 365399884, now seen corresponding path program 55 times [2021-06-05 04:11:40,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:40,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342774039] [2021-06-05 04:11:40,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:40,771 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 04:11:40,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:40,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342774039] [2021-06-05 04:11:40,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342774039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:40,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551022990] [2021-06-05 04:11:40,771 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 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 04:11:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:40,792 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:40,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:40,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:40,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:40,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:40,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:40,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:11:40,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:11:40,996 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 04:11:40,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551022990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:40,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:40,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:40,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623421921] [2021-06-05 04:11:40,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:40,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:40,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:40,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:40,997 INFO L87 Difference]: Start difference. First operand 144 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:41,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:41,186 INFO L93 Difference]: Finished difference Result 164 states and 445 transitions. [2021-06-05 04:11:41,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:11:41,187 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:41,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:41,187 INFO L225 Difference]: With dead ends: 164 [2021-06-05 04:11:41,187 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 04:11:41,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 269.2ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:11:41,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 04:11:41,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2021-06-05 04:11:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8194444444444446) internal successors, (406), 144 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 04:11:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 406 transitions. [2021-06-05 04:11:41,192 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 406 transitions. Word has length 16 [2021-06-05 04:11:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:41,192 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 406 transitions. [2021-06-05 04:11:41,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:41,192 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 406 transitions. [2021-06-05 04:11:41,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:41,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:41,192 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:41,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:41,408 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:41,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1224274414, now seen corresponding path program 56 times [2021-06-05 04:11:41,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:41,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667072432] [2021-06-05 04:11:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:41,545 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 04:11:41,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:41,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667072432] [2021-06-05 04:11:41,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667072432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:41,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342304874] [2021-06-05 04:11:41,545 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 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 04:11:41,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:11:41,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:41,568 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:41,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:41,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:41,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:41,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:41,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:41,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:42,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:42,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:42,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:43,250 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 313 [2021-06-05 04:11:43,387 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 325 [2021-06-05 04:11:43,530 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 325 [2021-06-05 04:11:43,679 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 329 [2021-06-05 04:11:43,833 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 327 [2021-06-05 04:11:44,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:44,190 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:44,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:44,191 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:44,217 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 04:11:44,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342304874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:44,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:44,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:44,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947010377] [2021-06-05 04:11:44,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:44,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:44,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:44,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:44,218 INFO L87 Difference]: Start difference. First operand 145 states and 406 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:44,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:44,543 INFO L93 Difference]: Finished difference Result 199 states and 522 transitions. [2021-06-05 04:11:44,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:11:44,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:44,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:44,544 INFO L225 Difference]: With dead ends: 199 [2021-06-05 04:11:44,544 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:11:44,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:11:44,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:11:44,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 144. [2021-06-05 04:11:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.8181818181818183) internal successors, (403), 143 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:44,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 403 transitions. [2021-06-05 04:11:44,546 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 403 transitions. Word has length 16 [2021-06-05 04:11:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:44,547 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 403 transitions. [2021-06-05 04:11:44,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:44,547 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 403 transitions. [2021-06-05 04:11:44,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:44,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:44,547 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:44,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4334,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:44,763 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:44,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:44,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1360079574, now seen corresponding path program 57 times [2021-06-05 04:11:44,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:44,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319597856] [2021-06-05 04:11:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:44,845 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 04:11:44,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:44,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319597856] [2021-06-05 04:11:44,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319597856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:44,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923073237] [2021-06-05 04:11:44,845 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 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 04:11:44,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:11:44,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:44,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:44,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:45,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:45,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:45,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:45,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:45,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:45,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:45,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:45,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:46,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:46,685 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:46,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:46,686 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:46,710 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 04:11:46,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923073237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:46,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:46,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:46,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930735891] [2021-06-05 04:11:46,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:46,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:46,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:46,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:46,712 INFO L87 Difference]: Start difference. First operand 144 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:47,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:47,148 INFO L93 Difference]: Finished difference Result 222 states and 560 transitions. [2021-06-05 04:11:47,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:11:47,148 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:47,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:47,149 INFO L225 Difference]: With dead ends: 222 [2021-06-05 04:11:47,149 INFO L226 Difference]: Without dead ends: 212 [2021-06-05 04:11:47,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 401.3ms TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:11:47,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-05 04:11:47,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 145. [2021-06-05 04:11:47,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8194444444444446) internal successors, (406), 144 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 04:11:47,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 406 transitions. [2021-06-05 04:11:47,151 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 406 transitions. Word has length 16 [2021-06-05 04:11:47,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:47,151 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 406 transitions. [2021-06-05 04:11:47,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:47,151 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 406 transitions. [2021-06-05 04:11:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:47,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:47,152 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:47,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4694 [2021-06-05 04:11:47,352 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:47,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:47,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1298863593, now seen corresponding path program 58 times [2021-06-05 04:11:47,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:47,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939102278] [2021-06-05 04:11:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:47,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:47,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939102278] [2021-06-05 04:11:47,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939102278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:47,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037782704] [2021-06-05 04:11:47,387 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 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 04:11:47,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:11:47,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:47,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:11:47,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:11:47,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037782704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:47,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:47,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:11:47,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265403006] [2021-06-05 04:11:47,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:11:47,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:47,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:11:47,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:11:47,435 INFO L87 Difference]: Start difference. First operand 145 states and 406 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 04:11:47,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:47,474 INFO L93 Difference]: Finished difference Result 273 states and 654 transitions. [2021-06-05 04:11:47,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:11:47,474 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 16 [2021-06-05 04:11:47,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:47,475 INFO L225 Difference]: With dead ends: 273 [2021-06-05 04:11:47,475 INFO L226 Difference]: Without dead ends: 273 [2021-06-05 04:11:47,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:11:47,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-06-05 04:11:47,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 175. [2021-06-05 04:11:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8908045977011496) internal successors, (503), 174 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 04:11:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 503 transitions. [2021-06-05 04:11:47,477 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 503 transitions. Word has length 16 [2021-06-05 04:11:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:47,478 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 503 transitions. [2021-06-05 04:11:47,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 04:11:47,478 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 503 transitions. [2021-06-05 04:11:47,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:47,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:47,478 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:47,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5047 [2021-06-05 04:11:47,694 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:47,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:47,694 INFO L82 PathProgramCache]: Analyzing trace with hash 129325422, now seen corresponding path program 59 times [2021-06-05 04:11:47,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:47,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661109937] [2021-06-05 04:11:47,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:47,766 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 04:11:47,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:47,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661109937] [2021-06-05 04:11:47,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661109937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:47,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744665076] [2021-06-05 04:11:47,766 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 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 04:11:47,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:11:47,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:47,789 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:47,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:47,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:47,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:48,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:48,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:48,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:48,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:48,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:48,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:48,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:48,862 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:48,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:48,863 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:48,887 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 04:11:48,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744665076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:48,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:48,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:48,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516042571] [2021-06-05 04:11:48,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:48,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:48,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:48,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:48,888 INFO L87 Difference]: Start difference. First operand 175 states and 503 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:49,373 INFO L93 Difference]: Finished difference Result 273 states and 689 transitions. [2021-06-05 04:11:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:11:49,373 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:49,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:49,374 INFO L225 Difference]: With dead ends: 273 [2021-06-05 04:11:49,374 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 04:11:49,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 455.7ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:11:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 04:11:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 176. [2021-06-05 04:11:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.874285714285714) internal successors, (503), 175 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 04:11:49,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 503 transitions. [2021-06-05 04:11:49,377 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 503 transitions. Word has length 16 [2021-06-05 04:11:49,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:49,377 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 503 transitions. [2021-06-05 04:11:49,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:49,377 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 503 transitions. [2021-06-05 04:11:49,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:49,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:49,377 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:49,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5048,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:49,578 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:49,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:49,578 INFO L82 PathProgramCache]: Analyzing trace with hash -761996209, now seen corresponding path program 60 times [2021-06-05 04:11:49,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:49,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409412537] [2021-06-05 04:11:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:49,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:49,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409412537] [2021-06-05 04:11:49,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409412537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:49,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678953119] [2021-06-05 04:11:49,614 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 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 04:11:49,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:11:49,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:49,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:11:49,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:49,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678953119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:49,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:49,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:11:49,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021910017] [2021-06-05 04:11:49,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:11:49,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:49,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:11:49,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:11:49,678 INFO L87 Difference]: Start difference. First operand 176 states and 503 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:11:49,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:49,737 INFO L93 Difference]: Finished difference Result 300 states and 694 transitions. [2021-06-05 04:11:49,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:11:49,737 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 04:11:49,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:49,738 INFO L225 Difference]: With dead ends: 300 [2021-06-05 04:11:49,738 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 04:11:49,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:11:49,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 04:11:49,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 174. [2021-06-05 04:11:49,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.867052023121387) internal successors, (496), 173 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 04:11:49,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 496 transitions. [2021-06-05 04:11:49,741 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 496 transitions. Word has length 16 [2021-06-05 04:11:49,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:49,741 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 496 transitions. [2021-06-05 04:11:49,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:11:49,741 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 496 transitions. [2021-06-05 04:11:49,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:49,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:49,741 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:49,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5248,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:49,953 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:49,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:49,953 INFO L82 PathProgramCache]: Analyzing trace with hash -943759958, now seen corresponding path program 61 times [2021-06-05 04:11:49,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:49,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721175800] [2021-06-05 04:11:49,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:50,029 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 04:11:50,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:50,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721175800] [2021-06-05 04:11:50,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721175800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:50,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970061125] [2021-06-05 04:11:50,029 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 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 04:11:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:50,053 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:50,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:50,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:50,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:50,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:50,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:50,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:50,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:50,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:50,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:51,626 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 272 [2021-06-05 04:11:51,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:51,964 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:51,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:51,965 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:51,989 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 04:11:51,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970061125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:51,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:51,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:51,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396476533] [2021-06-05 04:11:51,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:51,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:51,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:51,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:51,990 INFO L87 Difference]: Start difference. First operand 174 states and 496 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:52,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:52,444 INFO L93 Difference]: Finished difference Result 242 states and 614 transitions. [2021-06-05 04:11:52,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:11:52,444 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:52,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:52,445 INFO L225 Difference]: With dead ends: 242 [2021-06-05 04:11:52,445 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 04:11:52,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 537.6ms TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:11:52,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 04:11:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 174. [2021-06-05 04:11:52,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.867052023121387) internal successors, (496), 173 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 04:11:52,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 496 transitions. [2021-06-05 04:11:52,448 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 496 transitions. Word has length 16 [2021-06-05 04:11:52,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:52,448 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 496 transitions. [2021-06-05 04:11:52,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:52,448 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 496 transitions. [2021-06-05 04:11:52,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:52,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:52,448 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:52,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5249,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:52,664 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:52,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:52,665 INFO L82 PathProgramCache]: Analyzing trace with hash -224140631, now seen corresponding path program 62 times [2021-06-05 04:11:52,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:52,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150740014] [2021-06-05 04:11:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:52,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:52,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150740014] [2021-06-05 04:11:52,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150740014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:52,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305735063] [2021-06-05 04:11:52,695 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 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 04:11:52,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:11:52,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:52,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:11:52,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:52,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305735063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:52,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:52,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:11:52,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47021572] [2021-06-05 04:11:52,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:11:52,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:52,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:11:52,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:11:52,747 INFO L87 Difference]: Start difference. First operand 174 states and 496 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:11:52,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:52,829 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2021-06-05 04:11:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:11:52,829 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 04:11:52,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:52,830 INFO L225 Difference]: With dead ends: 262 [2021-06-05 04:11:52,830 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 04:11:52,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:11:52,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 04:11:52,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 167. [2021-06-05 04:11:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:52,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-06-05 04:11:52,833 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-06-05 04:11:52,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:52,833 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-06-05 04:11:52,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:11:52,833 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-06-05 04:11:52,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:52,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:52,833 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:53,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5581,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:53,049 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:53,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:53,049 INFO L82 PathProgramCache]: Analyzing trace with hash 150331630, now seen corresponding path program 63 times [2021-06-05 04:11:53,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:53,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646111314] [2021-06-05 04:11:53,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:53,116 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 04:11:53,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:53,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646111314] [2021-06-05 04:11:53,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646111314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:53,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081656098] [2021-06-05 04:11:53,117 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 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 04:11:53,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:11:53,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:53,140 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:53,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:53,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:53,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:53,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:53,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:53,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:54,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:54,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:54,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:54,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:54,581 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:54,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:54,581 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:54,606 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 04:11:54,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081656098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:54,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:54,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:54,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289992299] [2021-06-05 04:11:54,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:54,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:54,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:54,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:54,607 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:55,142 INFO L93 Difference]: Finished difference Result 233 states and 590 transitions. [2021-06-05 04:11:55,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:11:55,142 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:55,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:55,143 INFO L225 Difference]: With dead ends: 233 [2021-06-05 04:11:55,143 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 04:11:55,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 610.7ms TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:11:55,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 04:11:55,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 167. [2021-06-05 04:11:55,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:55,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-06-05 04:11:55,146 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-06-05 04:11:55,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:55,146 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-06-05 04:11:55,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:55,146 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-06-05 04:11:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:55,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:55,146 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:55,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5582,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:55,351 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:55,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:55,352 INFO L82 PathProgramCache]: Analyzing trace with hash -730486897, now seen corresponding path program 64 times [2021-06-05 04:11:55,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:55,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391949633] [2021-06-05 04:11:55,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:55,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:55,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391949633] [2021-06-05 04:11:55,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391949633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:55,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066058335] [2021-06-05 04:11:55,388 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 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 04:11:55,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:11:55,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:55,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:11:55,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:55,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066058335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:55,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:55,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:11:55,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303834344] [2021-06-05 04:11:55,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:11:55,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:55,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:11:55,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:11:55,447 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:11:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:55,545 INFO L93 Difference]: Finished difference Result 257 states and 618 transitions. [2021-06-05 04:11:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:11:55,546 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 04:11:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:55,547 INFO L225 Difference]: With dead ends: 257 [2021-06-05 04:11:55,547 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 04:11:55,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:55,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 04:11:55,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 167. [2021-06-05 04:11:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:55,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-06-05 04:11:55,549 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-06-05 04:11:55,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:55,549 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-06-05 04:11:55,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:11:55,549 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-06-05 04:11:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:55,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:55,550 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:55,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5825 [2021-06-05 04:11:55,757 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:55,757 INFO L82 PathProgramCache]: Analyzing trace with hash -292567510, now seen corresponding path program 65 times [2021-06-05 04:11:55,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:55,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450729619] [2021-06-05 04:11:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:55,828 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 04:11:55,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:55,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450729619] [2021-06-05 04:11:55,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450729619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:55,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456561199] [2021-06-05 04:11:55,828 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 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 04:11:55,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:11:55,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:55,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:11:55,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:56,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:56,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:11:56,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:56,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:56,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 04:11:57,697 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 357 [2021-06-05 04:11:57,842 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 357 [2021-06-05 04:11:58,005 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 361 [2021-06-05 04:11:58,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:58,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:58,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 04:11:58,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 04:11:58,773 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 04:11:58,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:11:58,774 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 04:11:58,801 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 04:11:58,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456561199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:58,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:58,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 04:11:58,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238846641] [2021-06-05 04:11:58,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:58,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:58,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:58,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:58,802 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:59,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:59,352 INFO L93 Difference]: Finished difference Result 220 states and 566 transitions. [2021-06-05 04:11:59,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:11:59,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-06-05 04:11:59,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:59,354 INFO L225 Difference]: With dead ends: 220 [2021-06-05 04:11:59,354 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 04:11:59,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 678.9ms TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:11:59,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 04:11:59,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 169. [2021-06-05 04:11:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.8392857142857144) internal successors, (477), 168 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 477 transitions. [2021-06-05 04:11:59,356 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 477 transitions. Word has length 16 [2021-06-05 04:11:59,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:59,356 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 477 transitions. [2021-06-05 04:11:59,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 04:11:59,356 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 477 transitions. [2021-06-05 04:11:59,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:11:59,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:59,356 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:59,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5826 [2021-06-05 04:11:59,557 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:59,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:59,557 INFO L82 PathProgramCache]: Analyzing trace with hash 752648041, now seen corresponding path program 66 times [2021-06-05 04:11:59,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:59,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161683870] [2021-06-05 04:11:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:59,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:59,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161683870] [2021-06-05 04:11:59,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161683870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:59,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075419954] [2021-06-05 04:11:59,589 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 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 04:11:59,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:11:59,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:59,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:11:59,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:59,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075419954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:59,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:59,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:11:59,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190111703] [2021-06-05 04:11:59,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:11:59,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:59,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:11:59,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:11:59,641 INFO L87 Difference]: Start difference. First operand 169 states and 477 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:11:59,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:59,754 INFO L93 Difference]: Finished difference Result 283 states and 699 transitions. [2021-06-05 04:11:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:11:59,754 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 04:11:59,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:59,755 INFO L225 Difference]: With dead ends: 283 [2021-06-05 04:11:59,755 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 04:11:59,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:59,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 04:11:59,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 176. [2021-06-05 04:11:59,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.8457142857142856) internal successors, (498), 175 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 04:11:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 498 transitions. [2021-06-05 04:11:59,758 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 498 transitions. Word has length 16 [2021-06-05 04:11:59,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:59,758 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 498 transitions. [2021-06-05 04:11:59,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:11:59,758 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 498 transitions. [2021-06-05 04:11:59,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:11:59,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:59,758 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:59,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6284,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:59,959 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:59,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:59,959 INFO L82 PathProgramCache]: Analyzing trace with hash -883413798, now seen corresponding path program 67 times [2021-06-05 04:11:59,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:59,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142953739] [2021-06-05 04:11:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:00,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:00,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142953739] [2021-06-05 04:12:00,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142953739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:00,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114879317] [2021-06-05 04:12:00,058 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 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 04:12:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:00,080 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:12:00,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:00,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:00,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:12:00,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:00,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:00,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:00,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:12:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:00,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114879317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:00,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:00,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:00,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58682546] [2021-06-05 04:12:00,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:00,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:00,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:00,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:00,549 INFO L87 Difference]: Start difference. First operand 176 states and 498 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:00,798 INFO L93 Difference]: Finished difference Result 212 states and 582 transitions. [2021-06-05 04:12:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:12:00,798 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-06-05 04:12:00,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:00,809 INFO L225 Difference]: With dead ends: 212 [2021-06-05 04:12:00,809 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 04:12:00,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:12:00,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 04:12:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 186. [2021-06-05 04:12:00,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8702702702702703) internal successors, (531), 185 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 04:12:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 531 transitions. [2021-06-05 04:12:00,812 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 531 transitions. Word has length 17 [2021-06-05 04:12:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:00,812 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 531 transitions. [2021-06-05 04:12:00,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 531 transitions. [2021-06-05 04:12:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:00,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:00,812 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:01,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6285 [2021-06-05 04:12:01,028 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:01,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:01,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1745149700, now seen corresponding path program 68 times [2021-06-05 04:12:01,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:01,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623573802] [2021-06-05 04:12:01,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:01,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:01,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623573802] [2021-06-05 04:12:01,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623573802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:01,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610995503] [2021-06-05 04:12:01,128 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 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 04:12:01,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:01,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:01,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:12:01,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:01,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:01,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:12:01,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:01,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:01,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:01,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:12:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:01,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610995503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:01,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:01,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:01,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729729389] [2021-06-05 04:12:01,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:01,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:01,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:01,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:01,443 INFO L87 Difference]: Start difference. First operand 186 states and 531 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:01,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:01,744 INFO L93 Difference]: Finished difference Result 207 states and 575 transitions. [2021-06-05 04:12:01,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:12:01,744 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-06-05 04:12:01,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:01,745 INFO L225 Difference]: With dead ends: 207 [2021-06-05 04:12:01,745 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 04:12:01,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 314.0ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:12:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 04:12:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2021-06-05 04:12:01,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.860215053763441) internal successors, (532), 186 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:01,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 532 transitions. [2021-06-05 04:12:01,748 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 532 transitions. Word has length 17 [2021-06-05 04:12:01,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:01,748 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 532 transitions. [2021-06-05 04:12:01,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:01,748 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 532 transitions. [2021-06-05 04:12:01,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:01,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:01,748 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:01,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6369,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:01,964 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:01,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:01,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1690943066, now seen corresponding path program 69 times [2021-06-05 04:12:01,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:01,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464718466] [2021-06-05 04:12:01,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:02,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:02,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464718466] [2021-06-05 04:12:02,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464718466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:02,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001910362] [2021-06-05 04:12:02,062 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 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 04:12:02,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:12:02,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:02,085 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:12:02,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:02,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:02,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 04:12:03,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:03,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:03,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:12:03,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:03,807 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:03,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:03,808 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 04:12:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:03,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001910362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:03,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:03,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:03,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586227754] [2021-06-05 04:12:03,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:03,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:03,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:03,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:03,835 INFO L87 Difference]: Start difference. First operand 187 states and 532 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:04,134 INFO L93 Difference]: Finished difference Result 235 states and 628 transitions. [2021-06-05 04:12:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:12:04,135 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-06-05 04:12:04,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:04,136 INFO L225 Difference]: With dead ends: 235 [2021-06-05 04:12:04,136 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 04:12:04,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 267.8ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:12:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 04:12:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 186. [2021-06-05 04:12:04,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8594594594594596) internal successors, (529), 185 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 04:12:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 529 transitions. [2021-06-05 04:12:04,138 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 529 transitions. Word has length 17 [2021-06-05 04:12:04,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:04,138 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 529 transitions. [2021-06-05 04:12:04,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:04,138 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 529 transitions. [2021-06-05 04:12:04,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:04,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:04,139 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:04,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6405,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:04,342 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:04,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:04,342 INFO L82 PathProgramCache]: Analyzing trace with hash -2038563784, now seen corresponding path program 70 times [2021-06-05 04:12:04,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:04,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996033394] [2021-06-05 04:12:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:04,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:04,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996033394] [2021-06-05 04:12:04,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996033394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:04,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204956879] [2021-06-05 04:12:04,456 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 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 04:12:04,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:12:04,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:04,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:12:04,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:04,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:04,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 04:12:05,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:05,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:05,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:12:05,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:05,504 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:05,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:05,505 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 04:12:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:05,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204956879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:05,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:05,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:05,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895920809] [2021-06-05 04:12:05,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:05,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:05,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:05,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:05,533 INFO L87 Difference]: Start difference. First operand 186 states and 529 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:05,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:05,953 INFO L93 Difference]: Finished difference Result 263 states and 678 transitions. [2021-06-05 04:12:05,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:12:05,953 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-06-05 04:12:05,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:05,954 INFO L225 Difference]: With dead ends: 263 [2021-06-05 04:12:05,954 INFO L226 Difference]: Without dead ends: 253 [2021-06-05 04:12:05,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 368.9ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:12:05,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-06-05 04:12:05,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 187. [2021-06-05 04:12:05,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.860215053763441) internal successors, (532), 186 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:05,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 532 transitions. [2021-06-05 04:12:05,957 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 532 transitions. Word has length 17 [2021-06-05 04:12:05,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:05,957 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 532 transitions. [2021-06-05 04:12:05,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:05,957 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 532 transitions. [2021-06-05 04:12:05,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:05,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:05,957 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:06,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6709 [2021-06-05 04:12:06,158 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:06,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:06,158 INFO L82 PathProgramCache]: Analyzing trace with hash 620379383, now seen corresponding path program 71 times [2021-06-05 04:12:06,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:06,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215566004] [2021-06-05 04:12:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:06,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:06,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215566004] [2021-06-05 04:12:06,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215566004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:06,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905532300] [2021-06-05 04:12:06,192 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 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 04:12:06,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:12:06,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:06,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:12:06,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:06,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905532300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:06,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:06,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:12:06,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572342113] [2021-06-05 04:12:06,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:12:06,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:06,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:12:06,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:12:06,294 INFO L87 Difference]: Start difference. First operand 187 states and 532 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:12:06,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:06,333 INFO L93 Difference]: Finished difference Result 357 states and 825 transitions. [2021-06-05 04:12:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:12:06,333 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-06-05 04:12:06,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:06,334 INFO L225 Difference]: With dead ends: 357 [2021-06-05 04:12:06,334 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 04:12:06,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:06,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 04:12:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 189. [2021-06-05 04:12:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.867021276595745) internal successors, (539), 188 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 04:12:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 539 transitions. [2021-06-05 04:12:06,337 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 539 transitions. Word has length 17 [2021-06-05 04:12:06,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:06,337 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 539 transitions. [2021-06-05 04:12:06,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:12:06,337 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 539 transitions. [2021-06-05 04:12:06,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:06,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:06,338 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:06,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6875,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:06,553 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:06,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:06,553 INFO L82 PathProgramCache]: Analyzing trace with hash -821225785, now seen corresponding path program 72 times [2021-06-05 04:12:06,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:06,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815710763] [2021-06-05 04:12:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:06,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:06,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815710763] [2021-06-05 04:12:06,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815710763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:06,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153476314] [2021-06-05 04:12:06,584 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 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 04:12:06,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:12:06,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:06,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:12:06,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:06,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153476314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:06,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:06,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:12:06,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592704285] [2021-06-05 04:12:06,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:12:06,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:06,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:12:06,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:12:06,640 INFO L87 Difference]: Start difference. First operand 189 states and 539 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:12:06,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:06,702 INFO L93 Difference]: Finished difference Result 374 states and 857 transitions. [2021-06-05 04:12:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:12:06,702 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-06-05 04:12:06,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:06,703 INFO L225 Difference]: With dead ends: 374 [2021-06-05 04:12:06,703 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 04:12:06,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:12:06,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 04:12:06,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 189. [2021-06-05 04:12:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.867021276595745) internal successors, (539), 188 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 04:12:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 539 transitions. [2021-06-05 04:12:06,707 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 539 transitions. Word has length 17 [2021-06-05 04:12:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:06,707 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 539 transitions. [2021-06-05 04:12:06,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:12:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 539 transitions. [2021-06-05 04:12:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:06,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:06,707 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:06,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6876,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:06,913 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:06,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1971772518, now seen corresponding path program 73 times [2021-06-05 04:12:06,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:06,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484521048] [2021-06-05 04:12:06,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:07,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:07,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484521048] [2021-06-05 04:12:07,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484521048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:07,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994200782] [2021-06-05 04:12:07,073 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 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 04:12:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:07,097 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:12:07,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:07,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:07,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:12:07,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:07,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:07,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:07,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:12:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:07,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994200782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:07,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:07,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:07,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649941658] [2021-06-05 04:12:07,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:07,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:07,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:07,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:07,410 INFO L87 Difference]: Start difference. First operand 189 states and 539 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:07,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:07,660 INFO L93 Difference]: Finished difference Result 202 states and 560 transitions. [2021-06-05 04:12:07,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:12:07,660 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-06-05 04:12:07,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:07,661 INFO L225 Difference]: With dead ends: 202 [2021-06-05 04:12:07,661 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 04:12:07,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 383.9ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:12:07,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 04:12:07,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2021-06-05 04:12:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.856382978723404) internal successors, (537), 188 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 04:12:07,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 537 transitions. [2021-06-05 04:12:07,663 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 537 transitions. Word has length 17 [2021-06-05 04:12:07,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:07,663 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 537 transitions. [2021-06-05 04:12:07,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:07,663 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 537 transitions. [2021-06-05 04:12:07,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:07,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:07,664 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:07,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6877,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:07,864 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:07,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:07,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1112897988, now seen corresponding path program 74 times [2021-06-05 04:12:07,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:07,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408673774] [2021-06-05 04:12:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:08,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:08,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408673774] [2021-06-05 04:12:08,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408673774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:08,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924123820] [2021-06-05 04:12:08,002 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 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 04:12:08,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:08,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:08,025 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:12:08,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:08,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:08,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 04:12:08,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:08,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:08,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:12:08,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:08,955 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:08,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:08,956 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 04:12:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:08,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924123820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:08,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:08,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:08,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563333701] [2021-06-05 04:12:08,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:08,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:08,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:08,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:08,984 INFO L87 Difference]: Start difference. First operand 189 states and 537 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:09,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:09,309 INFO L93 Difference]: Finished difference Result 227 states and 606 transitions. [2021-06-05 04:12:09,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:12:09,310 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-06-05 04:12:09,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:09,311 INFO L225 Difference]: With dead ends: 227 [2021-06-05 04:12:09,311 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 04:12:09,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:12:09,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 04:12:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 189. [2021-06-05 04:12:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.856382978723404) internal successors, (537), 188 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 04:12:09,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 537 transitions. [2021-06-05 04:12:09,313 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 537 transitions. Word has length 17 [2021-06-05 04:12:09,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:09,313 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 537 transitions. [2021-06-05 04:12:09,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:09,313 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 537 transitions. [2021-06-05 04:12:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:09,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:09,314 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:09,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6919 [2021-06-05 04:12:09,529 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:09,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:09,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1195798685, now seen corresponding path program 75 times [2021-06-05 04:12:09,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:09,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818313938] [2021-06-05 04:12:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:09,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:09,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818313938] [2021-06-05 04:12:09,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818313938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:09,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442541949] [2021-06-05 04:12:09,560 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 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 04:12:09,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:12:09,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:09,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:12:09,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:09,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442541949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:09,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:09,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:12:09,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914978517] [2021-06-05 04:12:09,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:12:09,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:09,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:12:09,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:12:09,609 INFO L87 Difference]: Start difference. First operand 189 states and 537 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:12:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:09,665 INFO L93 Difference]: Finished difference Result 377 states and 865 transitions. [2021-06-05 04:12:09,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:12:09,666 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-06-05 04:12:09,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:09,667 INFO L225 Difference]: With dead ends: 377 [2021-06-05 04:12:09,667 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 04:12:09,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:12:09,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 04:12:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 197. [2021-06-05 04:12:09,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8877551020408165) internal successors, (566), 196 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 04:12:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 566 transitions. [2021-06-05 04:12:09,670 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 566 transitions. Word has length 17 [2021-06-05 04:12:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:09,670 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 566 transitions. [2021-06-05 04:12:09,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:12:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 566 transitions. [2021-06-05 04:12:09,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:09,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:09,670 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:09,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7094,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:09,885 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:09,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:09,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1733654263, now seen corresponding path program 76 times [2021-06-05 04:12:09,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:09,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115863349] [2021-06-05 04:12:09,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:09,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:09,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115863349] [2021-06-05 04:12:09,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115863349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:09,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246410102] [2021-06-05 04:12:09,917 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 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 04:12:09,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:12:09,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:09,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:12:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:09,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246410102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:09,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:09,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:12:09,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216155280] [2021-06-05 04:12:09,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:09,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:09,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:09,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:09,992 INFO L87 Difference]: Start difference. First operand 197 states and 566 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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 04:12:10,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:10,085 INFO L93 Difference]: Finished difference Result 413 states and 931 transitions. [2021-06-05 04:12:10,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:12:10,085 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 17 [2021-06-05 04:12:10,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:10,086 INFO L225 Difference]: With dead ends: 413 [2021-06-05 04:12:10,086 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 04:12:10,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:12:10,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 04:12:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 197. [2021-06-05 04:12:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.872448979591837) internal successors, (563), 196 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 563 transitions. [2021-06-05 04:12:10,089 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 563 transitions. Word has length 17 [2021-06-05 04:12:10,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:10,090 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 563 transitions. [2021-06-05 04:12:10,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 04:12:10,090 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 563 transitions. [2021-06-05 04:12:10,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:10,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:10,090 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:10,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7095,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:10,306 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:10,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:10,306 INFO L82 PathProgramCache]: Analyzing trace with hash 426443908, now seen corresponding path program 77 times [2021-06-05 04:12:10,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:10,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612778862] [2021-06-05 04:12:10,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:10,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:10,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612778862] [2021-06-05 04:12:10,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612778862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:10,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061555432] [2021-06-05 04:12:10,446 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 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 04:12:10,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:12:10,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:10,475 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:12:10,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:10,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:10,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:12:10,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:10,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:10,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:10,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:12:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:10,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061555432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:10,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:10,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:10,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334344143] [2021-06-05 04:12:10,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:10,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:10,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:10,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:10,774 INFO L87 Difference]: Start difference. First operand 197 states and 563 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:11,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:11,090 INFO L93 Difference]: Finished difference Result 211 states and 586 transitions. [2021-06-05 04:12:11,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:12:11,090 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-06-05 04:12:11,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:11,091 INFO L225 Difference]: With dead ends: 211 [2021-06-05 04:12:11,091 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 04:12:11,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 355.5ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:12:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 04:12:11,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2021-06-05 04:12:11,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.86734693877551) internal successors, (562), 196 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:11,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 562 transitions. [2021-06-05 04:12:11,093 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 562 transitions. Word has length 17 [2021-06-05 04:12:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:11,094 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 562 transitions. [2021-06-05 04:12:11,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 562 transitions. [2021-06-05 04:12:11,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:11,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:11,094 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:11,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7096,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:11,310 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:11,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:11,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1285318438, now seen corresponding path program 78 times [2021-06-05 04:12:11,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:11,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637972181] [2021-06-05 04:12:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:11,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:11,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637972181] [2021-06-05 04:12:11,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637972181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:11,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089647640] [2021-06-05 04:12:11,447 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 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 04:12:11,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:12:11,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:11,469 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:12:11,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:11,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:11,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 04:12:12,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 04:12:12,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:12,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:12:12,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:12,438 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-06-05 04:12:12,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:12,439 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 04:12:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:12,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089647640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:12,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:12,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:12,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768216809] [2021-06-05 04:12:12,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:12,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:12,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:12,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:12,466 INFO L87 Difference]: Start difference. First operand 197 states and 562 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:12,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:12,825 INFO L93 Difference]: Finished difference Result 244 states and 655 transitions. [2021-06-05 04:12:12,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:12:12,825 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-06-05 04:12:12,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:12,826 INFO L225 Difference]: With dead ends: 244 [2021-06-05 04:12:12,826 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 04:12:12,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:12:12,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 04:12:12,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 197. [2021-06-05 04:12:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.86734693877551) internal successors, (562), 196 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 562 transitions. [2021-06-05 04:12:12,829 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 562 transitions. Word has length 17 [2021-06-05 04:12:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:12,829 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 562 transitions. [2021-06-05 04:12:12,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 562 transitions. [2021-06-05 04:12:12,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:12,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:12,829 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:13,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7137 [2021-06-05 04:12:13,033 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:13,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:13,033 INFO L82 PathProgramCache]: Analyzing trace with hash -163096607, now seen corresponding path program 79 times [2021-06-05 04:12:13,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:13,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53199981] [2021-06-05 04:12:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:13,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:13,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53199981] [2021-06-05 04:12:13,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53199981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:13,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870016539] [2021-06-05 04:12:13,070 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 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 04:12:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:13,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:12:13,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:13,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870016539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:13,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:13,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:12:13,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810897409] [2021-06-05 04:12:13,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:13,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:13,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:13,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:13,121 INFO L87 Difference]: Start difference. First operand 197 states and 562 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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 04:12:13,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:13,208 INFO L93 Difference]: Finished difference Result 427 states and 977 transitions. [2021-06-05 04:12:13,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:12:13,209 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 17 [2021-06-05 04:12:13,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:13,210 INFO L225 Difference]: With dead ends: 427 [2021-06-05 04:12:13,210 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 04:12:13,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:12:13,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 04:12:13,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 207. [2021-06-05 04:12:13,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.907766990291262) internal successors, (599), 206 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 04:12:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 599 transitions. [2021-06-05 04:12:13,213 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 599 transitions. Word has length 17 [2021-06-05 04:12:13,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:13,213 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 599 transitions. [2021-06-05 04:12:13,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 04:12:13,213 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 599 transitions. [2021-06-05 04:12:13,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:13,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:13,213 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:13,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7310 [2021-06-05 04:12:13,421 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:13,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:13,421 INFO L82 PathProgramCache]: Analyzing trace with hash -669442873, now seen corresponding path program 80 times [2021-06-05 04:12:13,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:13,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216789390] [2021-06-05 04:12:13,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:13,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:13,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216789390] [2021-06-05 04:12:13,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216789390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:13,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366054713] [2021-06-05 04:12:13,454 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 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 04:12:13,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:13,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:13,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:12:13,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:13,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366054713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:13,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:13,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:12:13,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978344691] [2021-06-05 04:12:13,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:13,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:13,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:13,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:13,507 INFO L87 Difference]: Start difference. First operand 207 states and 599 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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 04:12:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:13,627 INFO L93 Difference]: Finished difference Result 378 states and 905 transitions. [2021-06-05 04:12:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:12:13,627 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 17 [2021-06-05 04:12:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:13,628 INFO L225 Difference]: With dead ends: 378 [2021-06-05 04:12:13,628 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 04:12:13,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:13,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 04:12:13,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 204. [2021-06-05 04:12:13,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9014778325123154) internal successors, (589), 203 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 04:12:13,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 589 transitions. [2021-06-05 04:12:13,631 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 589 transitions. Word has length 17 [2021-06-05 04:12:13,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:13,632 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 589 transitions. [2021-06-05 04:12:13,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 04:12:13,632 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 589 transitions. [2021-06-05 04:12:13,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:13,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:13,632 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:13,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7311 [2021-06-05 04:12:13,832 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:13,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:13,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1756709082, now seen corresponding path program 81 times [2021-06-05 04:12:13,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:13,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254298817] [2021-06-05 04:12:13,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:13,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:13,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254298817] [2021-06-05 04:12:13,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254298817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:13,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728937173] [2021-06-05 04:12:13,992 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 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 04:12:14,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:12:14,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:14,037 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:12:14,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:14,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:14,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:12:14,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:14,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:14,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:14,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:12:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:14,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728937173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:14,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:14,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:14,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784196288] [2021-06-05 04:12:14,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:14,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:14,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:14,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:14,451 INFO L87 Difference]: Start difference. First operand 204 states and 589 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:14,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:14,691 INFO L93 Difference]: Finished difference Result 222 states and 624 transitions. [2021-06-05 04:12:14,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:12:14,691 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-06-05 04:12:14,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:14,692 INFO L225 Difference]: With dead ends: 222 [2021-06-05 04:12:14,692 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 04:12:14,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 300.2ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:12:14,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 04:12:14,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2021-06-05 04:12:14,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.9019607843137254) internal successors, (592), 204 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 04:12:14,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 592 transitions. [2021-06-05 04:12:14,694 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 592 transitions. Word has length 17 [2021-06-05 04:12:14,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:14,694 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 592 transitions. [2021-06-05 04:12:14,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:14,694 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 592 transitions. [2021-06-05 04:12:14,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:14,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:14,695 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:14,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7312 [2021-06-05 04:12:14,895 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:14,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:14,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1679383684, now seen corresponding path program 82 times [2021-06-05 04:12:14,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:14,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900648821] [2021-06-05 04:12:14,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:15,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:15,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900648821] [2021-06-05 04:12:15,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900648821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:15,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603592005] [2021-06-05 04:12:15,035 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 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 04:12:15,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:12:15,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:15,057 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:12:15,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:15,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:15,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 04:12:15,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:15,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:15,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:12:15,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:15,836 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:15,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:15,837 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 04:12:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:15,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603592005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:15,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:15,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:15,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001180775] [2021-06-05 04:12:15,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:15,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:15,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:15,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:15,863 INFO L87 Difference]: Start difference. First operand 205 states and 592 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:16,233 INFO L93 Difference]: Finished difference Result 256 states and 697 transitions. [2021-06-05 04:12:16,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:12:16,234 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-06-05 04:12:16,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:16,234 INFO L225 Difference]: With dead ends: 256 [2021-06-05 04:12:16,235 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 04:12:16,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 335.3ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:12:16,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 04:12:16,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 204. [2021-06-05 04:12:16,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9014778325123154) internal successors, (589), 203 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 04:12:16,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 589 transitions. [2021-06-05 04:12:16,238 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 589 transitions. Word has length 17 [2021-06-05 04:12:16,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:16,238 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 589 transitions. [2021-06-05 04:12:16,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:16,238 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 589 transitions. [2021-06-05 04:12:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:16,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:16,238 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:16,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7386,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:16,447 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:16,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:16,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1604794505, now seen corresponding path program 83 times [2021-06-05 04:12:16,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:16,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669594452] [2021-06-05 04:12:16,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:12:16,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:16,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669594452] [2021-06-05 04:12:16,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669594452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:16,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581373144] [2021-06-05 04:12:16,477 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 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 04:12:16,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:12:16,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:16,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:12:16,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:12:16,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581373144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:16,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:16,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:12:16,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356375553] [2021-06-05 04:12:16,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:12:16,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:16,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:12:16,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:12:16,525 INFO L87 Difference]: Start difference. First operand 204 states and 589 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 04:12:16,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:16,558 INFO L93 Difference]: Finished difference Result 345 states and 847 transitions. [2021-06-05 04:12:16,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:12:16,558 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 17 [2021-06-05 04:12:16,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:16,559 INFO L225 Difference]: With dead ends: 345 [2021-06-05 04:12:16,559 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 04:12:16,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:12:16,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 04:12:16,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 227. [2021-06-05 04:12:16,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.938053097345133) internal successors, (664), 226 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 664 transitions. [2021-06-05 04:12:16,563 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 664 transitions. Word has length 17 [2021-06-05 04:12:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:16,563 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 664 transitions. [2021-06-05 04:12:16,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 04:12:16,563 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 664 transitions. [2021-06-05 04:12:16,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:16,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:16,563 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:16,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7543 [2021-06-05 04:12:16,769 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:16,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:16,769 INFO L82 PathProgramCache]: Analyzing trace with hash 629312989, now seen corresponding path program 84 times [2021-06-05 04:12:16,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:16,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130684395] [2021-06-05 04:12:16,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:16,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:16,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130684395] [2021-06-05 04:12:16,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130684395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:16,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171156698] [2021-06-05 04:12:16,807 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 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 04:12:16,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:12:16,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:16,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:12:16,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:16,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171156698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:16,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:16,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:12:16,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120283335] [2021-06-05 04:12:16,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:12:16,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:16,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:12:16,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:12:16,853 INFO L87 Difference]: Start difference. First operand 227 states and 664 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:12:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:16,901 INFO L93 Difference]: Finished difference Result 369 states and 882 transitions. [2021-06-05 04:12:16,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:12:16,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-06-05 04:12:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:16,902 INFO L225 Difference]: With dead ends: 369 [2021-06-05 04:12:16,902 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 04:12:16,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:12:16,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 04:12:16,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 215. [2021-06-05 04:12:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.911214953271028) internal successors, (623), 214 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 623 transitions. [2021-06-05 04:12:16,914 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 623 transitions. Word has length 17 [2021-06-05 04:12:16,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:16,914 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 623 transitions. [2021-06-05 04:12:16,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:12:16,914 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 623 transitions. [2021-06-05 04:12:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:16,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:16,915 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:17,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7544 [2021-06-05 04:12:17,117 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:17,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:17,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1167168567, now seen corresponding path program 85 times [2021-06-05 04:12:17,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:17,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19249477] [2021-06-05 04:12:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:17,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:17,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19249477] [2021-06-05 04:12:17,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19249477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:17,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884109751] [2021-06-05 04:12:17,147 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 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 04:12:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:12:17,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:17,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884109751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:17,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:17,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:12:17,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195619160] [2021-06-05 04:12:17,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:17,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:17,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:17,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:17,200 INFO L87 Difference]: Start difference. First operand 215 states and 623 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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 04:12:17,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:17,300 INFO L93 Difference]: Finished difference Result 388 states and 893 transitions. [2021-06-05 04:12:17,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:12:17,301 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 17 [2021-06-05 04:12:17,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:17,301 INFO L225 Difference]: With dead ends: 388 [2021-06-05 04:12:17,301 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 04:12:17,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:12:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 04:12:17,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 204. [2021-06-05 04:12:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.896551724137931) internal successors, (588), 203 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 04:12:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 588 transitions. [2021-06-05 04:12:17,305 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 588 transitions. Word has length 17 [2021-06-05 04:12:17,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:17,305 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 588 transitions. [2021-06-05 04:12:17,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 04:12:17,305 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 588 transitions. [2021-06-05 04:12:17,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:17,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:17,305 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:17,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7545,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:17,521 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:17,521 INFO L82 PathProgramCache]: Analyzing trace with hash 660822301, now seen corresponding path program 86 times [2021-06-05 04:12:17,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:17,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482176031] [2021-06-05 04:12:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:17,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:17,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482176031] [2021-06-05 04:12:17,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482176031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:17,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910438037] [2021-06-05 04:12:17,553 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 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 04:12:17,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:17,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:17,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:12:17,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:17,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910438037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:17,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:17,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:12:17,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127544316] [2021-06-05 04:12:17,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:17,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:17,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:17,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:17,606 INFO L87 Difference]: Start difference. First operand 204 states and 588 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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 04:12:17,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:17,722 INFO L93 Difference]: Finished difference Result 319 states and 762 transitions. [2021-06-05 04:12:17,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:12:17,722 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 17 [2021-06-05 04:12:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:17,723 INFO L225 Difference]: With dead ends: 319 [2021-06-05 04:12:17,723 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 04:12:17,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 04:12:17,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 198. [2021-06-05 04:12:17,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.8934010152284264) internal successors, (570), 197 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 04:12:17,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 570 transitions. [2021-06-05 04:12:17,725 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 570 transitions. Word has length 17 [2021-06-05 04:12:17,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:17,725 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 570 transitions. [2021-06-05 04:12:17,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 04:12:17,726 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 570 transitions. [2021-06-05 04:12:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:17,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:17,726 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:17,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7546 [2021-06-05 04:12:17,942 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:17,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:17,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2143957239, now seen corresponding path program 87 times [2021-06-05 04:12:17,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:17,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379728588] [2021-06-05 04:12:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:17,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:17,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379728588] [2021-06-05 04:12:17,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379728588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:17,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416689192] [2021-06-05 04:12:17,979 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 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 04:12:18,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:12:18,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:18,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:12:18,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:18,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416689192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:18,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:18,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:12:18,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933660089] [2021-06-05 04:12:18,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:18,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:18,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:18,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:18,032 INFO L87 Difference]: Start difference. First operand 198 states and 570 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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 04:12:18,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:18,178 INFO L93 Difference]: Finished difference Result 345 states and 840 transitions. [2021-06-05 04:12:18,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:12:18,179 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 17 [2021-06-05 04:12:18,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:18,179 INFO L225 Difference]: With dead ends: 345 [2021-06-05 04:12:18,179 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 04:12:18,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:12:18,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 04:12:18,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 202. [2021-06-05 04:12:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8955223880597014) internal successors, (582), 201 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 04:12:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 582 transitions. [2021-06-05 04:12:18,182 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 582 transitions. Word has length 17 [2021-06-05 04:12:18,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:18,182 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 582 transitions. [2021-06-05 04:12:18,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 04:12:18,182 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 582 transitions. [2021-06-05 04:12:18,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:18,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:18,182 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:18,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7547,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:18,389 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:18,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:18,389 INFO L82 PathProgramCache]: Analyzing trace with hash 45256516, now seen corresponding path program 88 times [2021-06-05 04:12:18,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:18,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039384293] [2021-06-05 04:12:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:18,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:18,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039384293] [2021-06-05 04:12:18,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039384293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:18,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872471230] [2021-06-05 04:12:18,540 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 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 04:12:18,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:12:18,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:18,579 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:12:18,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:18,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:18,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:12:18,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:18,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:18,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:18,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:12:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:18,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872471230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:18,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:18,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:18,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505565281] [2021-06-05 04:12:18,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:18,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:18,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:18,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:18,962 INFO L87 Difference]: Start difference. First operand 202 states and 582 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:19,237 INFO L93 Difference]: Finished difference Result 234 states and 664 transitions. [2021-06-05 04:12:19,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:12:19,237 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-06-05 04:12:19,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:19,238 INFO L225 Difference]: With dead ends: 234 [2021-06-05 04:12:19,238 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 04:12:19,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:12:19,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 04:12:19,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 212. [2021-06-05 04:12:19,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.928909952606635) internal successors, (618), 211 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 618 transitions. [2021-06-05 04:12:19,240 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 618 transitions. Word has length 17 [2021-06-05 04:12:19,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:19,240 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 618 transitions. [2021-06-05 04:12:19,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:19,241 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 618 transitions. [2021-06-05 04:12:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:19,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:19,241 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:19,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7548,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:19,457 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:19,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:19,458 INFO L82 PathProgramCache]: Analyzing trace with hash 904131046, now seen corresponding path program 89 times [2021-06-05 04:12:19,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:19,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377941636] [2021-06-05 04:12:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:19,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:19,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377941636] [2021-06-05 04:12:19,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377941636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:19,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987095739] [2021-06-05 04:12:19,603 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 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 04:12:19,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:12:19,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:19,626 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:12:19,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:19,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:19,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 04:12:20,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:20,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:20,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:12:20,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:20,706 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:20,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:20,706 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 04:12:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:20,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987095739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:20,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:20,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:20,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53283174] [2021-06-05 04:12:20,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:20,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:20,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:20,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:20,733 INFO L87 Difference]: Start difference. First operand 212 states and 618 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:21,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:21,138 INFO L93 Difference]: Finished difference Result 272 states and 753 transitions. [2021-06-05 04:12:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:12:21,139 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-06-05 04:12:21,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:21,139 INFO L225 Difference]: With dead ends: 272 [2021-06-05 04:12:21,139 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 04:12:21,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:12:21,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 04:12:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 212. [2021-06-05 04:12:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.933649289099526) internal successors, (619), 211 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 04:12:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 619 transitions. [2021-06-05 04:12:21,142 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 619 transitions. Word has length 17 [2021-06-05 04:12:21,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:21,142 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 619 transitions. [2021-06-05 04:12:21,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:21,142 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 619 transitions. [2021-06-05 04:12:21,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:21,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:21,142 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:21,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7612,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:21,343 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:21,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:21,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1680222942, now seen corresponding path program 90 times [2021-06-05 04:12:21,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:21,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330211892] [2021-06-05 04:12:21,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:21,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:21,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330211892] [2021-06-05 04:12:21,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330211892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:21,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565001473] [2021-06-05 04:12:21,465 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 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 04:12:21,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:12:21,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:21,488 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:12:21,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:21,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:21,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 04:12:22,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 04:12:22,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:22,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:12:22,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:22,509 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 04:12:22,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:12:22,510 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 04:12:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:22,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565001473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:22,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:22,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:22,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709913350] [2021-06-05 04:12:22,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:22,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:22,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:22,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:22,546 INFO L87 Difference]: Start difference. First operand 212 states and 619 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:23,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:23,248 INFO L93 Difference]: Finished difference Result 304 states and 812 transitions. [2021-06-05 04:12:23,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:12:23,248 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 17 [2021-06-05 04:12:23,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:23,249 INFO L225 Difference]: With dead ends: 304 [2021-06-05 04:12:23,249 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 04:12:23,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 573.2ms TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:12:23,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 04:12:23,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 213. [2021-06-05 04:12:23,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.938679245283019) internal successors, (623), 212 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:23,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 623 transitions. [2021-06-05 04:12:23,252 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 623 transitions. Word has length 17 [2021-06-05 04:12:23,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:23,252 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 623 transitions. [2021-06-05 04:12:23,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) 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 04:12:23,252 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 623 transitions. [2021-06-05 04:12:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:23,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:23,252 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:23,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7795 [2021-06-05 04:12:23,468 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:23,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:23,469 INFO L82 PathProgramCache]: Analyzing trace with hash 978720225, now seen corresponding path program 91 times [2021-06-05 04:12:23,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:23,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668064595] [2021-06-05 04:12:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:23,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:23,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668064595] [2021-06-05 04:12:23,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668064595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:23,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141407925] [2021-06-05 04:12:23,502 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:12:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:23,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:12:23,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:23,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141407925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:23,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:23,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:12:23,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604441975] [2021-06-05 04:12:23,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:12:23,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:23,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:12:23,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:12:23,557 INFO L87 Difference]: Start difference. First operand 213 states and 623 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:12:23,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:23,598 INFO L93 Difference]: Finished difference Result 364 states and 870 transitions. [2021-06-05 04:12:23,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:12:23,598 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:12:23,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:23,599 INFO L225 Difference]: With dead ends: 364 [2021-06-05 04:12:23,599 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 04:12:23,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:12:23,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 04:12:23,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 220. [2021-06-05 04:12:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.954337899543379) internal successors, (647), 219 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 647 transitions. [2021-06-05 04:12:23,602 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 647 transitions. Word has length 17 [2021-06-05 04:12:23,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:23,602 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 647 transitions. [2021-06-05 04:12:23,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:12:23,602 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 647 transitions. [2021-06-05 04:12:23,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:23,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:23,602 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:23,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7995 [2021-06-05 04:12:23,818 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:23,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:23,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1082139577, now seen corresponding path program 92 times [2021-06-05 04:12:23,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:23,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042135794] [2021-06-05 04:12:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:23,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:23,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042135794] [2021-06-05 04:12:23,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042135794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:23,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885474401] [2021-06-05 04:12:23,854 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 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 04:12:23,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:23,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:23,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:12:23,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:12:23,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885474401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:23,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:23,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:12:23,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867240466] [2021-06-05 04:12:23,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:12:23,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:23,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:12:23,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:12:23,908 INFO L87 Difference]: Start difference. First operand 220 states and 647 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:12:23,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:23,956 INFO L93 Difference]: Finished difference Result 346 states and 892 transitions. [2021-06-05 04:12:23,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:12:23,957 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:12:23,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:23,957 INFO L225 Difference]: With dead ends: 346 [2021-06-05 04:12:23,957 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 04:12:23,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:12:23,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 04:12:23,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 250. [2021-06-05 04:12:23,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9759036144578315) internal successors, (741), 249 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:23,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 741 transitions. [2021-06-05 04:12:23,960 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 741 transitions. Word has length 17 [2021-06-05 04:12:23,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:23,960 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 741 transitions. [2021-06-05 04:12:23,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:12:23,960 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 741 transitions. [2021-06-05 04:12:23,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:23,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:23,961 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:24,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7996,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:24,161 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:24,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:24,162 INFO L82 PathProgramCache]: Analyzing trace with hash -544283999, now seen corresponding path program 93 times [2021-06-05 04:12:24,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:24,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48439509] [2021-06-05 04:12:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:24,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:24,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48439509] [2021-06-05 04:12:24,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48439509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:24,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501440846] [2021-06-05 04:12:24,202 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 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 04:12:24,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:12:24,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:24,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:12:24,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:24,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501440846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:24,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:24,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:12:24,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061461430] [2021-06-05 04:12:24,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:24,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:24,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:24,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:24,258 INFO L87 Difference]: Start difference. First operand 250 states and 741 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:24,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:24,333 INFO L93 Difference]: Finished difference Result 372 states and 930 transitions. [2021-06-05 04:12:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:12:24,333 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-05 04:12:24,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:24,334 INFO L225 Difference]: With dead ends: 372 [2021-06-05 04:12:24,334 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 04:12:24,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:12:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 04:12:24,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 247. [2021-06-05 04:12:24,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9715447154471546) internal successors, (731), 246 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 731 transitions. [2021-06-05 04:12:24,337 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 731 transitions. Word has length 17 [2021-06-05 04:12:24,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:24,337 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 731 transitions. [2021-06-05 04:12:24,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:24,337 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 731 transitions. [2021-06-05 04:12:24,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:24,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:24,338 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:24,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7997,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:24,554 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:24,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:24,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1050630265, now seen corresponding path program 94 times [2021-06-05 04:12:24,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:24,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273357114] [2021-06-05 04:12:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:24,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:24,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273357114] [2021-06-05 04:12:24,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273357114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:24,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755678769] [2021-06-05 04:12:24,589 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 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 04:12:24,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:12:24,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:24,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:12:24,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:24,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755678769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:24,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:24,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:12:24,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827798833] [2021-06-05 04:12:24,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:24,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:24,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:24,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:24,642 INFO L87 Difference]: Start difference. First operand 247 states and 731 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:24,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:24,752 INFO L93 Difference]: Finished difference Result 335 states and 866 transitions. [2021-06-05 04:12:24,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:12:24,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-05 04:12:24,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:24,753 INFO L225 Difference]: With dead ends: 335 [2021-06-05 04:12:24,753 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 04:12:24,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:12:24,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 04:12:24,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 244. [2021-06-05 04:12:24,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.97119341563786) internal successors, (722), 243 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:24,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 722 transitions. [2021-06-05 04:12:24,756 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 722 transitions. Word has length 17 [2021-06-05 04:12:24,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:24,756 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 722 transitions. [2021-06-05 04:12:24,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:24,756 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 722 transitions. [2021-06-05 04:12:24,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:24,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:24,756 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:24,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7998,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:24,965 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:24,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:24,965 INFO L82 PathProgramCache]: Analyzing trace with hash 432504673, now seen corresponding path program 95 times [2021-06-05 04:12:24,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:24,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572832766] [2021-06-05 04:12:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:25,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:25,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572832766] [2021-06-05 04:12:25,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572832766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:25,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374696685] [2021-06-05 04:12:25,004 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 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 04:12:25,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:12:25,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:25,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:12:25,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:25,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374696685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:25,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:25,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:12:25,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301040210] [2021-06-05 04:12:25,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:25,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:25,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:25,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:25,058 INFO L87 Difference]: Start difference. First operand 244 states and 722 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:25,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:25,176 INFO L93 Difference]: Finished difference Result 346 states and 896 transitions. [2021-06-05 04:12:25,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:12:25,176 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-05 04:12:25,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:25,177 INFO L225 Difference]: With dead ends: 346 [2021-06-05 04:12:25,177 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 04:12:25,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:12:25,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 04:12:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 244. [2021-06-05 04:12:25,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.97119341563786) internal successors, (722), 243 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:25,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 722 transitions. [2021-06-05 04:12:25,180 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 722 transitions. Word has length 17 [2021-06-05 04:12:25,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:25,180 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 722 transitions. [2021-06-05 04:12:25,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:25,180 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 722 transitions. [2021-06-05 04:12:25,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:12:25,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:25,180 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:25,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7999,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:25,393 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:25,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:25,393 INFO L82 PathProgramCache]: Analyzing trace with hash -834952505, now seen corresponding path program 96 times [2021-06-05 04:12:25,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:25,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897918408] [2021-06-05 04:12:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:25,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:25,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897918408] [2021-06-05 04:12:25,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897918408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:25,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479286392] [2021-06-05 04:12:25,431 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 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 04:12:25,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:12:25,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:25,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:12:25,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:25,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479286392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:25,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:25,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:12:25,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668835391] [2021-06-05 04:12:25,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:25,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:25,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:25,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:25,484 INFO L87 Difference]: Start difference. First operand 244 states and 722 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:25,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:25,600 INFO L93 Difference]: Finished difference Result 385 states and 1019 transitions. [2021-06-05 04:12:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:12:25,600 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-05 04:12:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:25,601 INFO L225 Difference]: With dead ends: 385 [2021-06-05 04:12:25,601 INFO L226 Difference]: Without dead ends: 385 [2021-06-05 04:12:25,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:25,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-05 04:12:25,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 252. [2021-06-05 04:12:25,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9721115537848606) internal successors, (746), 251 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:25,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 746 transitions. [2021-06-05 04:12:25,604 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 746 transitions. Word has length 17 [2021-06-05 04:12:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:25,604 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 746 transitions. [2021-06-05 04:12:25,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:25,604 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 746 transitions. [2021-06-05 04:12:25,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:25,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:25,604 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:25,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8000 [2021-06-05 04:12:25,805 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:25,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:25,805 INFO L82 PathProgramCache]: Analyzing trace with hash -702501620, now seen corresponding path program 97 times [2021-06-05 04:12:25,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:25,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806646937] [2021-06-05 04:12:25,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:25,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:25,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806646937] [2021-06-05 04:12:25,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806646937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:25,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664841449] [2021-06-05 04:12:25,887 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 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 04:12:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:25,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:12:25,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:26,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:26,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:26,998 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 216 [2021-06-05 04:12:27,105 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 217 [2021-06-05 04:12:27,217 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 217 [2021-06-05 04:12:27,335 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 221 [2021-06-05 04:12:27,485 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 232 [2021-06-05 04:12:27,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:27,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:27,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:27,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:27,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664841449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:27,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:27,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:27,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914001571] [2021-06-05 04:12:27,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:27,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:27,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:27,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:27,749 INFO L87 Difference]: Start difference. First operand 252 states and 746 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:28,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:28,030 INFO L93 Difference]: Finished difference Result 306 states and 891 transitions. [2021-06-05 04:12:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:12:28,030 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:28,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:28,031 INFO L225 Difference]: With dead ends: 306 [2021-06-05 04:12:28,031 INFO L226 Difference]: Without dead ends: 301 [2021-06-05 04:12:28,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:12:28,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-06-05 04:12:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 272. [2021-06-05 04:12:28,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.992619926199262) internal successors, (811), 271 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 811 transitions. [2021-06-05 04:12:28,034 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 811 transitions. Word has length 18 [2021-06-05 04:12:28,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:28,034 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 811 transitions. [2021-06-05 04:12:28,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:28,034 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 811 transitions. [2021-06-05 04:12:28,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:28,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:28,034 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:28,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8001,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:28,235 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:28,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:28,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1857651606, now seen corresponding path program 98 times [2021-06-05 04:12:28,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:28,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664438662] [2021-06-05 04:12:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:28,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:28,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664438662] [2021-06-05 04:12:28,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664438662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:28,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176262242] [2021-06-05 04:12:28,327 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 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 04:12:28,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:28,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:28,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:12:28,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:28,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:28,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:29,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:29,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:29,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:29,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:29,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176262242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:29,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:29,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:29,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534513362] [2021-06-05 04:12:29,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:29,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:29,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:29,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:29,189 INFO L87 Difference]: Start difference. First operand 272 states and 811 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:29,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:29,777 INFO L93 Difference]: Finished difference Result 402 states and 1031 transitions. [2021-06-05 04:12:29,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:12:29,778 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:29,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:29,778 INFO L225 Difference]: With dead ends: 402 [2021-06-05 04:12:29,778 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 04:12:29,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 440.6ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:12:29,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 04:12:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 272. [2021-06-05 04:12:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.992619926199262) internal successors, (811), 271 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 811 transitions. [2021-06-05 04:12:29,782 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 811 transitions. Word has length 18 [2021-06-05 04:12:29,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:29,782 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 811 transitions. [2021-06-05 04:12:29,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 811 transitions. [2021-06-05 04:12:29,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:29,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:29,782 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:29,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8203 [2021-06-05 04:12:29,983 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:29,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:29,983 INFO L82 PathProgramCache]: Analyzing trace with hash 801291561, now seen corresponding path program 99 times [2021-06-05 04:12:29,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:29,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122691148] [2021-06-05 04:12:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:30,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:30,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122691148] [2021-06-05 04:12:30,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122691148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:30,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974885662] [2021-06-05 04:12:30,022 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 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 04:12:30,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:12:30,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:30,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:30,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:30,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974885662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:30,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:30,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:12:30,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421703246] [2021-06-05 04:12:30,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:30,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:30,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:30,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:30,105 INFO L87 Difference]: Start difference. First operand 272 states and 811 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:30,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:30,157 INFO L93 Difference]: Finished difference Result 460 states and 1135 transitions. [2021-06-05 04:12:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:12:30,157 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-06-05 04:12:30,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:30,158 INFO L225 Difference]: With dead ends: 460 [2021-06-05 04:12:30,158 INFO L226 Difference]: Without dead ends: 460 [2021-06-05 04:12:30,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:12:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-06-05 04:12:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 274. [2021-06-05 04:12:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.9963369963369964) internal successors, (818), 273 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 818 transitions. [2021-06-05 04:12:30,168 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 818 transitions. Word has length 18 [2021-06-05 04:12:30,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:30,168 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 818 transitions. [2021-06-05 04:12:30,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:30,168 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 818 transitions. [2021-06-05 04:12:30,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:30,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:30,168 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:30,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8310,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:30,369 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:30,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:30,369 INFO L82 PathProgramCache]: Analyzing trace with hash -640313607, now seen corresponding path program 100 times [2021-06-05 04:12:30,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:30,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506263371] [2021-06-05 04:12:30,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:30,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:30,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506263371] [2021-06-05 04:12:30,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506263371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:30,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149329986] [2021-06-05 04:12:30,404 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 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 04:12:30,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:12:30,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:30,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:30,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:30,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149329986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:30,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:30,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:12:30,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708613385] [2021-06-05 04:12:30,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:30,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:30,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:30,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:30,459 INFO L87 Difference]: Start difference. First operand 274 states and 818 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:30,533 INFO L93 Difference]: Finished difference Result 492 states and 1194 transitions. [2021-06-05 04:12:30,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:12:30,533 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-06-05 04:12:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:30,534 INFO L225 Difference]: With dead ends: 492 [2021-06-05 04:12:30,534 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 04:12:30,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:12:30,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 04:12:30,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 276. [2021-06-05 04:12:30,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0) internal successors, (825), 275 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 825 transitions. [2021-06-05 04:12:30,538 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 825 transitions. Word has length 18 [2021-06-05 04:12:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:30,538 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 825 transitions. [2021-06-05 04:12:30,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 825 transitions. [2021-06-05 04:12:30,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:30,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:30,538 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:30,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8311 [2021-06-05 04:12:30,739 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:30,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:30,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1790860340, now seen corresponding path program 101 times [2021-06-05 04:12:30,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:30,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676083864] [2021-06-05 04:12:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:30,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:30,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676083864] [2021-06-05 04:12:30,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676083864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:30,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296247752] [2021-06-05 04:12:30,829 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 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 04:12:30,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:12:30,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:30,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:12:30,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:31,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:31,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:31,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:31,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:31,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:31,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:31,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296247752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:31,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:31,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:31,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227350878] [2021-06-05 04:12:31,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:31,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:31,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:31,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:31,426 INFO L87 Difference]: Start difference. First operand 276 states and 825 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:31,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:31,664 INFO L93 Difference]: Finished difference Result 323 states and 904 transitions. [2021-06-05 04:12:31,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:12:31,664 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:31,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:31,665 INFO L225 Difference]: With dead ends: 323 [2021-06-05 04:12:31,665 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 04:12:31,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 252.7ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:12:31,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 04:12:31,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 276. [2021-06-05 04:12:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0) internal successors, (825), 275 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:31,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 825 transitions. [2021-06-05 04:12:31,668 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 825 transitions. Word has length 18 [2021-06-05 04:12:31,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:31,668 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 825 transitions. [2021-06-05 04:12:31,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:31,668 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 825 transitions. [2021-06-05 04:12:31,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:31,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:31,669 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:31,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8312 [2021-06-05 04:12:31,885 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:31,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:31,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2026934802, now seen corresponding path program 102 times [2021-06-05 04:12:31,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:31,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038338332] [2021-06-05 04:12:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:31,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:31,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038338332] [2021-06-05 04:12:31,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038338332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:31,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888287547] [2021-06-05 04:12:31,965 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 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 04:12:31,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:12:31,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:31,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:12:31,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:32,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:32,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:32,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:32,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:32,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:32,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:32,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888287547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:32,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:32,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:32,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422673816] [2021-06-05 04:12:32,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:32,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:32,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:32,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:32,782 INFO L87 Difference]: Start difference. First operand 276 states and 825 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:33,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:33,113 INFO L93 Difference]: Finished difference Result 333 states and 930 transitions. [2021-06-05 04:12:33,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:12:33,114 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:33,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:33,114 INFO L225 Difference]: With dead ends: 333 [2021-06-05 04:12:33,114 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 04:12:33,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 300.6ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:12:33,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 04:12:33,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 278. [2021-06-05 04:12:33,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9819494584837547) internal successors, (826), 277 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:33,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 826 transitions. [2021-06-05 04:12:33,122 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 826 transitions. Word has length 18 [2021-06-05 04:12:33,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:33,122 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 826 transitions. [2021-06-05 04:12:33,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:33,122 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 826 transitions. [2021-06-05 04:12:33,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:33,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:33,123 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:33,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8409 [2021-06-05 04:12:33,323 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:33,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:33,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1194947114, now seen corresponding path program 103 times [2021-06-05 04:12:33,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:33,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515645201] [2021-06-05 04:12:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:33,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:33,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515645201] [2021-06-05 04:12:33,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515645201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:33,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215303676] [2021-06-05 04:12:33,407 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 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 04:12:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:33,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:12:33,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:33,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:33,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:34,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:34,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:34,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:34,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:34,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215303676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:34,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:34,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:34,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957676614] [2021-06-05 04:12:34,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:34,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:34,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:34,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:34,711 INFO L87 Difference]: Start difference. First operand 278 states and 826 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:35,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:35,164 INFO L93 Difference]: Finished difference Result 351 states and 960 transitions. [2021-06-05 04:12:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:12:35,165 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:35,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:35,165 INFO L225 Difference]: With dead ends: 351 [2021-06-05 04:12:35,165 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 04:12:35,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 364.5ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:12:35,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 04:12:35,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 280. [2021-06-05 04:12:35,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-06-05 04:12:35,168 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-06-05 04:12:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:35,168 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-06-05 04:12:35,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:35,169 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-06-05 04:12:35,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:35,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:35,169 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:35,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8516,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:35,370 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:35,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:35,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1914566441, now seen corresponding path program 104 times [2021-06-05 04:12:35,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:35,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988698501] [2021-06-05 04:12:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:35,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:35,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988698501] [2021-06-05 04:12:35,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988698501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:35,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476254117] [2021-06-05 04:12:35,407 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 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 04:12:35,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:35,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:35,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:35,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:35,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476254117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:35,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:35,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:12:35,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955299817] [2021-06-05 04:12:35,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:35,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:35,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:35,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:35,458 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:35,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:35,544 INFO L93 Difference]: Finished difference Result 527 states and 1263 transitions. [2021-06-05 04:12:35,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:12:35,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-06-05 04:12:35,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:35,545 INFO L225 Difference]: With dead ends: 527 [2021-06-05 04:12:35,545 INFO L226 Difference]: Without dead ends: 527 [2021-06-05 04:12:35,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:12:35,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-05 04:12:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 280. [2021-06-05 04:12:35,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:35,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-06-05 04:12:35,548 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-06-05 04:12:35,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:35,549 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-06-05 04:12:35,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:35,549 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-06-05 04:12:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:35,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:35,549 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:35,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8687 [2021-06-05 04:12:35,749 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:35,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:35,750 INFO L82 PathProgramCache]: Analyzing trace with hash 607356086, now seen corresponding path program 105 times [2021-06-05 04:12:35,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:35,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323710374] [2021-06-05 04:12:35,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:35,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:35,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323710374] [2021-06-05 04:12:35,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323710374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:35,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917533377] [2021-06-05 04:12:35,841 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 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 04:12:35,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:12:35,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:35,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:12:35,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:36,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:36,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:36,671 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 284 [2021-06-05 04:12:37,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:37,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:37,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:37,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:37,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917533377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:37,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:37,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:37,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684887339] [2021-06-05 04:12:37,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:37,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:37,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:37,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:37,549 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:37,777 INFO L93 Difference]: Finished difference Result 307 states and 875 transitions. [2021-06-05 04:12:37,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:12:37,777 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:37,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:37,778 INFO L225 Difference]: With dead ends: 307 [2021-06-05 04:12:37,778 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 04:12:37,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:12:37,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 04:12:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 280. [2021-06-05 04:12:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-06-05 04:12:37,781 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-06-05 04:12:37,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:37,781 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-06-05 04:12:37,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:37,781 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-06-05 04:12:37,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:37,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:37,782 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:37,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8688 [2021-06-05 04:12:37,989 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:37,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:37,989 INFO L82 PathProgramCache]: Analyzing trace with hash -520040007, now seen corresponding path program 106 times [2021-06-05 04:12:37,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:37,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365212696] [2021-06-05 04:12:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:38,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:38,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365212696] [2021-06-05 04:12:38,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365212696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:38,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797562213] [2021-06-05 04:12:38,021 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 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 04:12:38,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:12:38,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:38,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:38,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:12:38,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797562213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:38,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:38,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:12:38,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69048259] [2021-06-05 04:12:38,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:12:38,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:38,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:12:38,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:12:38,073 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:12:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:38,131 INFO L93 Difference]: Finished difference Result 474 states and 1151 transitions. [2021-06-05 04:12:38,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:12:38,131 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-06-05 04:12:38,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:38,132 INFO L225 Difference]: With dead ends: 474 [2021-06-05 04:12:38,132 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 04:12:38,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:12:38,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 04:12:38,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 291. [2021-06-05 04:12:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.986206896551724) internal successors, (866), 290 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 866 transitions. [2021-06-05 04:12:38,135 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 866 transitions. Word has length 18 [2021-06-05 04:12:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:38,135 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 866 transitions. [2021-06-05 04:12:38,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:12:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 866 transitions. [2021-06-05 04:12:38,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:38,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:38,136 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:38,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8868,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:38,336 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:38,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:38,337 INFO L82 PathProgramCache]: Analyzing trace with hash -701803756, now seen corresponding path program 107 times [2021-06-05 04:12:38,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:38,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247100646] [2021-06-05 04:12:38,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:38,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:38,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247100646] [2021-06-05 04:12:38,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247100646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:38,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866245903] [2021-06-05 04:12:38,420 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 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 04:12:38,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:12:38,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:38,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:12:38,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:38,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:38,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:39,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:39,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:39,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:39,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:39,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866245903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:39,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:39,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:39,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662543983] [2021-06-05 04:12:39,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:39,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:39,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:39,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:39,176 INFO L87 Difference]: Start difference. First operand 291 states and 866 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:39,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:39,598 INFO L93 Difference]: Finished difference Result 373 states and 1019 transitions. [2021-06-05 04:12:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:12:39,598 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:39,599 INFO L225 Difference]: With dead ends: 373 [2021-06-05 04:12:39,599 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 04:12:39,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 317.6ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:12:39,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 04:12:39,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 291. [2021-06-05 04:12:39,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9689655172413794) internal successors, (861), 290 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-06-05 04:12:39,602 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 18 [2021-06-05 04:12:39,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:39,602 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-06-05 04:12:39,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:39,602 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-06-05 04:12:39,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:39,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:39,602 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:39,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8869,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:39,803 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:39,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:39,803 INFO L82 PathProgramCache]: Analyzing trace with hash 17815571, now seen corresponding path program 108 times [2021-06-05 04:12:39,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:39,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265965264] [2021-06-05 04:12:39,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:39,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:39,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265965264] [2021-06-05 04:12:39,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265965264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:39,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133611723] [2021-06-05 04:12:39,841 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 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 04:12:39,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:12:39,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:39,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:39,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:39,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133611723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:39,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:39,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:12:39,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59097953] [2021-06-05 04:12:39,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:39,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:39,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:39,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:39,891 INFO L87 Difference]: Start difference. First operand 291 states and 861 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:39,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:39,979 INFO L93 Difference]: Finished difference Result 514 states and 1221 transitions. [2021-06-05 04:12:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:12:39,979 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-06-05 04:12:39,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:39,980 INFO L225 Difference]: With dead ends: 514 [2021-06-05 04:12:39,980 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 04:12:39,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:12:39,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 04:12:39,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 280. [2021-06-05 04:12:39,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.949820788530466) internal successors, (823), 279 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 823 transitions. [2021-06-05 04:12:39,983 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 823 transitions. Word has length 18 [2021-06-05 04:12:39,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:39,983 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 823 transitions. [2021-06-05 04:12:39,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 823 transitions. [2021-06-05 04:12:39,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:39,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:39,984 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:40,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8982 [2021-06-05 04:12:40,185 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:40,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:40,185 INFO L82 PathProgramCache]: Analyzing trace with hash -488530695, now seen corresponding path program 109 times [2021-06-05 04:12:40,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:40,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089276917] [2021-06-05 04:12:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:40,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:40,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089276917] [2021-06-05 04:12:40,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089276917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:40,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411534841] [2021-06-05 04:12:40,224 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 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 04:12:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:40,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:40,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:40,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411534841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:40,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:40,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:12:40,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930281958] [2021-06-05 04:12:40,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:12:40,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:40,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:12:40,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:12:40,278 INFO L87 Difference]: Start difference. First operand 280 states and 823 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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 04:12:40,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:40,418 INFO L93 Difference]: Finished difference Result 554 states and 1291 transitions. [2021-06-05 04:12:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:12:40,418 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 04:12:40,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:40,419 INFO L225 Difference]: With dead ends: 554 [2021-06-05 04:12:40,419 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 04:12:40,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:12:40,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 04:12:40,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 283. [2021-06-05 04:12:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.9397163120567376) internal successors, (829), 282 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 829 transitions. [2021-06-05 04:12:40,423 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 829 transitions. Word has length 18 [2021-06-05 04:12:40,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:40,423 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 829 transitions. [2021-06-05 04:12:40,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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 04:12:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 829 transitions. [2021-06-05 04:12:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:40,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:40,424 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:40,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8983,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:40,624 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:40,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:40,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1937621260, now seen corresponding path program 110 times [2021-06-05 04:12:40,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:40,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196281147] [2021-06-05 04:12:40,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:40,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:40,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196281147] [2021-06-05 04:12:40,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196281147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:40,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691616501] [2021-06-05 04:12:40,719 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 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 04:12:40,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:40,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:40,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:12:40,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:40,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:40,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:41,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:41,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:41,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:41,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:41,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691616501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:41,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:41,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:41,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63480196] [2021-06-05 04:12:41,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:41,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:41,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:41,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:41,385 INFO L87 Difference]: Start difference. First operand 283 states and 829 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:41,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:41,646 INFO L93 Difference]: Finished difference Result 301 states and 868 transitions. [2021-06-05 04:12:41,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:12:41,646 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:41,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:41,647 INFO L225 Difference]: With dead ends: 301 [2021-06-05 04:12:41,647 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 04:12:41,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 241.0ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:12:41,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 04:12:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 284. [2021-06-05 04:12:41,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.943462897526502) internal successors, (833), 283 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:41,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 833 transitions. [2021-06-05 04:12:41,650 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 833 transitions. Word has length 18 [2021-06-05 04:12:41,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:41,650 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 833 transitions. [2021-06-05 04:12:41,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:41,650 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 833 transitions. [2021-06-05 04:12:41,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:41,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:41,650 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:41,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8984 [2021-06-05 04:12:41,853 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:41,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:41,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1423882327, now seen corresponding path program 111 times [2021-06-05 04:12:41,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:41,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210451599] [2021-06-05 04:12:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:12:41,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:41,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210451599] [2021-06-05 04:12:41,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210451599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:41,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138764372] [2021-06-05 04:12:41,880 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 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 04:12:41,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:12:41,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:41,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:41,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:12:41,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138764372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:41,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:41,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:12:41,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345615718] [2021-06-05 04:12:41,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:12:41,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:41,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:12:41,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:12:41,931 INFO L87 Difference]: Start difference. First operand 284 states and 833 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 04:12:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:41,968 INFO L93 Difference]: Finished difference Result 435 states and 1110 transitions. [2021-06-05 04:12:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:12:41,968 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 18 [2021-06-05 04:12:41,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:41,969 INFO L225 Difference]: With dead ends: 435 [2021-06-05 04:12:41,969 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 04:12:41,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:12:41,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 04:12:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 311. [2021-06-05 04:12:41,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.967741935483871) internal successors, (920), 310 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 920 transitions. [2021-06-05 04:12:41,972 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 920 transitions. Word has length 18 [2021-06-05 04:12:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:41,973 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 920 transitions. [2021-06-05 04:12:41,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 04:12:41,973 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 920 transitions. [2021-06-05 04:12:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:41,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:41,973 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:42,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9123,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:42,189 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:42,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:42,189 INFO L82 PathProgramCache]: Analyzing trace with hash 810225167, now seen corresponding path program 112 times [2021-06-05 04:12:42,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:42,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895181476] [2021-06-05 04:12:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:42,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:42,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895181476] [2021-06-05 04:12:42,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895181476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:42,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414505378] [2021-06-05 04:12:42,235 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 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 04:12:42,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:12:42,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:42,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:42,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:12:42,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414505378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:42,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:42,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:12:42,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430812673] [2021-06-05 04:12:42,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:12:42,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:42,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:12:42,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:12:42,315 INFO L87 Difference]: Start difference. First operand 311 states and 920 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:12:42,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:42,369 INFO L93 Difference]: Finished difference Result 471 states and 1163 transitions. [2021-06-05 04:12:42,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:12:42,369 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-06-05 04:12:42,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:42,370 INFO L225 Difference]: With dead ends: 471 [2021-06-05 04:12:42,370 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 04:12:42,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:12:42,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 04:12:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 309. [2021-06-05 04:12:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9642857142857144) internal successors, (913), 308 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 913 transitions. [2021-06-05 04:12:42,375 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 913 transitions. Word has length 18 [2021-06-05 04:12:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:42,375 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 913 transitions. [2021-06-05 04:12:42,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:12:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 913 transitions. [2021-06-05 04:12:42,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:42,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:42,375 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:42,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9124 [2021-06-05 04:12:42,592 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:42,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:42,592 INFO L82 PathProgramCache]: Analyzing trace with hash 628461418, now seen corresponding path program 113 times [2021-06-05 04:12:42,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:42,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365441693] [2021-06-05 04:12:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:42,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:42,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365441693] [2021-06-05 04:12:42,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365441693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:42,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285257679] [2021-06-05 04:12:42,677 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 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 04:12:42,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:12:42,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:42,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:12:42,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:42,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:42,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:43,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:43,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:43,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:43,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:43,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285257679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:43,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:43,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:43,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371016766] [2021-06-05 04:12:43,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:43,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:43,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:43,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:43,343 INFO L87 Difference]: Start difference. First operand 309 states and 913 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:43,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:43,637 INFO L93 Difference]: Finished difference Result 383 states and 1039 transitions. [2021-06-05 04:12:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:12:43,638 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:43,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:43,638 INFO L225 Difference]: With dead ends: 383 [2021-06-05 04:12:43,638 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 04:12:43,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:12:43,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 04:12:43,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 309. [2021-06-05 04:12:43,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-06-05 04:12:43,642 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-06-05 04:12:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:43,642 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-06-05 04:12:43,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:43,642 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-06-05 04:12:43,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:43,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:43,642 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:43,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9125 [2021-06-05 04:12:43,843 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:43,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:43,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1348080745, now seen corresponding path program 114 times [2021-06-05 04:12:43,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:43,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21798372] [2021-06-05 04:12:43,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:43,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:43,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21798372] [2021-06-05 04:12:43,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21798372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:43,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927072154] [2021-06-05 04:12:43,887 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 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 04:12:43,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:12:43,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:43,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:43,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:43,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927072154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:43,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:43,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:12:43,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063391606] [2021-06-05 04:12:43,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:43,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:43,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:43,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:43,941 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:44,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:44,027 INFO L93 Difference]: Finished difference Result 503 states and 1214 transitions. [2021-06-05 04:12:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:12:44,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-06-05 04:12:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:44,028 INFO L225 Difference]: With dead ends: 503 [2021-06-05 04:12:44,028 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 04:12:44,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:12:44,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 04:12:44,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 309. [2021-06-05 04:12:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-06-05 04:12:44,031 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-06-05 04:12:44,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:44,032 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-06-05 04:12:44,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-06-05 04:12:44,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:44,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:44,032 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:44,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9256 [2021-06-05 04:12:44,245 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:44,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:44,245 INFO L82 PathProgramCache]: Analyzing trace with hash 841734479, now seen corresponding path program 115 times [2021-06-05 04:12:44,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:44,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616747502] [2021-06-05 04:12:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:44,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:44,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616747502] [2021-06-05 04:12:44,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616747502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:44,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17900309] [2021-06-05 04:12:44,281 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 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 04:12:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:44,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:44,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:44,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17900309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:44,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:44,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:12:44,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144893642] [2021-06-05 04:12:44,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:12:44,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:44,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:12:44,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:12:44,340 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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 04:12:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:44,471 INFO L93 Difference]: Finished difference Result 546 states and 1298 transitions. [2021-06-05 04:12:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:12:44,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 04:12:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:44,472 INFO L225 Difference]: With dead ends: 546 [2021-06-05 04:12:44,472 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 04:12:44,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:12:44,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 04:12:44,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 309. [2021-06-05 04:12:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-06-05 04:12:44,475 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-06-05 04:12:44,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:44,476 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-06-05 04:12:44,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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 04:12:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-06-05 04:12:44,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:44,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:44,476 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:44,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9257 [2021-06-05 04:12:44,678 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:44,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:44,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1970097879, now seen corresponding path program 116 times [2021-06-05 04:12:44,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:44,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523130394] [2021-06-05 04:12:44,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:44,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:44,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523130394] [2021-06-05 04:12:44,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523130394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:44,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413234567] [2021-06-05 04:12:44,723 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 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 04:12:44,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:44,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:44,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:44,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:44,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413234567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:44,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:44,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:12:44,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285902632] [2021-06-05 04:12:44,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:12:44,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:44,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:12:44,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:12:44,777 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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 04:12:44,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:44,934 INFO L93 Difference]: Finished difference Result 544 states and 1360 transitions. [2021-06-05 04:12:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:12:44,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 04:12:44,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:44,935 INFO L225 Difference]: With dead ends: 544 [2021-06-05 04:12:44,935 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 04:12:44,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:12:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 04:12:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 311. [2021-06-05 04:12:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9548387096774196) internal successors, (916), 310 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 916 transitions. [2021-06-05 04:12:44,939 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 916 transitions. Word has length 18 [2021-06-05 04:12:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:44,939 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 916 transitions. [2021-06-05 04:12:44,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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 04:12:44,939 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 916 transitions. [2021-06-05 04:12:44,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:44,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:44,939 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:45,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9258 [2021-06-05 04:12:45,155 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:45,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:45,155 INFO L82 PathProgramCache]: Analyzing trace with hash 226168694, now seen corresponding path program 117 times [2021-06-05 04:12:45,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:45,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527988378] [2021-06-05 04:12:45,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:45,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:45,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527988378] [2021-06-05 04:12:45,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527988378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:45,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807959554] [2021-06-05 04:12:45,260 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 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 04:12:45,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:12:45,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:45,285 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 04:12:45,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:45,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:45,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:45,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:45,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:45,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:45,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:45,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807959554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:45,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:45,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:45,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70494784] [2021-06-05 04:12:45,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:45,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:45,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:45,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:45,977 INFO L87 Difference]: Start difference. First operand 311 states and 916 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:46,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:46,327 INFO L93 Difference]: Finished difference Result 365 states and 1058 transitions. [2021-06-05 04:12:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:12:46,327 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:46,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:46,328 INFO L225 Difference]: With dead ends: 365 [2021-06-05 04:12:46,328 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 04:12:46,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:12:46,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 04:12:46,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 329. [2021-06-05 04:12:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9969512195121952) internal successors, (983), 328 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 983 transitions. [2021-06-05 04:12:46,331 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 983 transitions. Word has length 18 [2021-06-05 04:12:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:46,331 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 983 transitions. [2021-06-05 04:12:46,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:46,332 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 983 transitions. [2021-06-05 04:12:46,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:46,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:46,332 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:46,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9259,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:46,539 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:46,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:46,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1499310764, now seen corresponding path program 118 times [2021-06-05 04:12:46,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:46,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954351840] [2021-06-05 04:12:46,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:46,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:46,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954351840] [2021-06-05 04:12:46,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954351840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:46,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776393438] [2021-06-05 04:12:46,630 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 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 04:12:46,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:12:46,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:46,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:12:46,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:46,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:46,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:47,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:47,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:47,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:47,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:47,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776393438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:47,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:47,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:47,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932071106] [2021-06-05 04:12:47,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:47,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:47,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:47,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:47,794 INFO L87 Difference]: Start difference. First operand 329 states and 983 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:48,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:48,099 INFO L93 Difference]: Finished difference Result 375 states and 1069 transitions. [2021-06-05 04:12:48,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:12:48,100 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:48,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:48,100 INFO L225 Difference]: With dead ends: 375 [2021-06-05 04:12:48,100 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 04:12:48,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 286.1ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:12:48,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 04:12:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 329. [2021-06-05 04:12:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9969512195121952) internal successors, (983), 328 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 983 transitions. [2021-06-05 04:12:48,104 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 983 transitions. Word has length 18 [2021-06-05 04:12:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:48,104 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 983 transitions. [2021-06-05 04:12:48,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 983 transitions. [2021-06-05 04:12:48,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:48,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:48,105 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:48,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9355 [2021-06-05 04:12:48,305 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:48,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:48,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1159632403, now seen corresponding path program 119 times [2021-06-05 04:12:48,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:48,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060575176] [2021-06-05 04:12:48,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:48,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:48,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060575176] [2021-06-05 04:12:48,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060575176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:48,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303405005] [2021-06-05 04:12:48,336 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 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 04:12:48,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:12:48,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:48,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:48,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:12:48,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303405005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:48,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:48,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:12:48,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037771866] [2021-06-05 04:12:48,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:12:48,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:48,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:12:48,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:12:48,388 INFO L87 Difference]: Start difference. First operand 329 states and 983 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:12:48,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:48,435 INFO L93 Difference]: Finished difference Result 498 states and 1262 transitions. [2021-06-05 04:12:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:12:48,435 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-06-05 04:12:48,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:48,437 INFO L225 Difference]: With dead ends: 498 [2021-06-05 04:12:48,437 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 04:12:48,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:12:48,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 04:12:48,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 300. [2021-06-05 04:12:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9732441471571907) internal successors, (889), 299 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 889 transitions. [2021-06-05 04:12:48,440 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 889 transitions. Word has length 18 [2021-06-05 04:12:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:48,440 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 889 transitions. [2021-06-05 04:12:48,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:12:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 889 transitions. [2021-06-05 04:12:48,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:48,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:48,441 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:48,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9540 [2021-06-05 04:12:48,657 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:48,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:48,657 INFO L82 PathProgramCache]: Analyzing trace with hash -901227399, now seen corresponding path program 120 times [2021-06-05 04:12:48,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:48,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679456880] [2021-06-05 04:12:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:12:48,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:48,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679456880] [2021-06-05 04:12:48,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679456880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:48,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663096563] [2021-06-05 04:12:48,687 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 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 04:12:48,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:12:48,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:48,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:48,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:12:48,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663096563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:48,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:48,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:12:48,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830084661] [2021-06-05 04:12:48,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:12:48,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:48,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:12:48,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:12:48,737 INFO L87 Difference]: Start difference. First operand 300 states and 889 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:12:48,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:48,775 INFO L93 Difference]: Finished difference Result 440 states and 1150 transitions. [2021-06-05 04:12:48,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:12:48,775 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-06-05 04:12:48,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:48,776 INFO L225 Difference]: With dead ends: 440 [2021-06-05 04:12:48,776 INFO L226 Difference]: Without dead ends: 440 [2021-06-05 04:12:48,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:12:48,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-06-05 04:12:48,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 328. [2021-06-05 04:12:48,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9877675840978593) internal successors, (977), 327 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:48,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 977 transitions. [2021-06-05 04:12:48,780 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 977 transitions. Word has length 18 [2021-06-05 04:12:48,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:48,780 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 977 transitions. [2021-06-05 04:12:48,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:12:48,780 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 977 transitions. [2021-06-05 04:12:48,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:48,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:48,788 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:48,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9541 [2021-06-05 04:12:48,993 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:48,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:48,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1082991148, now seen corresponding path program 121 times [2021-06-05 04:12:48,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:48,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898414950] [2021-06-05 04:12:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:49,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:49,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898414950] [2021-06-05 04:12:49,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898414950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:49,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351081295] [2021-06-05 04:12:49,062 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 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 04:12:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:49,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:12:49,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:49,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:49,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:49,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:49,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:49,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:49,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:49,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351081295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:49,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:49,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:49,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602931915] [2021-06-05 04:12:49,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:49,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:49,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:49,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:49,994 INFO L87 Difference]: Start difference. First operand 328 states and 977 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:50,279 INFO L93 Difference]: Finished difference Result 386 states and 1061 transitions. [2021-06-05 04:12:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:12:50,279 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:50,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:50,280 INFO L225 Difference]: With dead ends: 386 [2021-06-05 04:12:50,280 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 04:12:50,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:12:50,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 04:12:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 328. [2021-06-05 04:12:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.984709480122324) internal successors, (976), 327 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 976 transitions. [2021-06-05 04:12:50,283 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 976 transitions. Word has length 18 [2021-06-05 04:12:50,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:50,283 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 976 transitions. [2021-06-05 04:12:50,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:50,284 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 976 transitions. [2021-06-05 04:12:50,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:50,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:50,284 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:50,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9542,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:50,484 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:50,485 INFO L82 PathProgramCache]: Analyzing trace with hash -363371821, now seen corresponding path program 122 times [2021-06-05 04:12:50,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:50,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034047461] [2021-06-05 04:12:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:50,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:50,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034047461] [2021-06-05 04:12:50,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034047461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:50,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572680568] [2021-06-05 04:12:50,524 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 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 04:12:50,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:50,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:50,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:50,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:50,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572680568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:50,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:50,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:12:50,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590687835] [2021-06-05 04:12:50,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:50,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:50,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:50,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:50,579 INFO L87 Difference]: Start difference. First operand 328 states and 976 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:50,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:50,649 INFO L93 Difference]: Finished difference Result 472 states and 1196 transitions. [2021-06-05 04:12:50,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:12:50,665 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-06-05 04:12:50,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:50,665 INFO L225 Difference]: With dead ends: 472 [2021-06-05 04:12:50,665 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 04:12:50,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:12:50,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 04:12:50,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 312. [2021-06-05 04:12:50,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9710610932475885) internal successors, (924), 311 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 924 transitions. [2021-06-05 04:12:50,669 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 924 transitions. Word has length 18 [2021-06-05 04:12:50,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:50,669 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 924 transitions. [2021-06-05 04:12:50,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:12:50,669 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 924 transitions. [2021-06-05 04:12:50,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:50,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:50,669 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:50,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9701,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:50,870 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:50,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:50,870 INFO L82 PathProgramCache]: Analyzing trace with hash -869718087, now seen corresponding path program 123 times [2021-06-05 04:12:50,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:50,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901907612] [2021-06-05 04:12:50,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:50,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:50,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901907612] [2021-06-05 04:12:50,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901907612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:50,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054603526] [2021-06-05 04:12:50,905 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 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 04:12:50,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:12:50,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:50,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:50,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:50,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054603526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:50,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:50,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:12:50,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655840545] [2021-06-05 04:12:50,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:12:50,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:50,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:12:50,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:12:50,961 INFO L87 Difference]: Start difference. First operand 312 states and 924 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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 04:12:51,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:51,075 INFO L93 Difference]: Finished difference Result 490 states and 1202 transitions. [2021-06-05 04:12:51,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:12:51,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 04:12:51,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:51,076 INFO L225 Difference]: With dead ends: 490 [2021-06-05 04:12:51,076 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 04:12:51,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:51,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 04:12:51,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 300. [2021-06-05 04:12:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9665551839464883) internal successors, (887), 299 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:51,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 887 transitions. [2021-06-05 04:12:51,079 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 887 transitions. Word has length 18 [2021-06-05 04:12:51,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:51,080 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 887 transitions. [2021-06-05 04:12:51,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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 04:12:51,080 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 887 transitions. [2021-06-05 04:12:51,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:51,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:51,080 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:51,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9702,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:51,281 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:51,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:51,281 INFO L82 PathProgramCache]: Analyzing trace with hash 613416851, now seen corresponding path program 124 times [2021-06-05 04:12:51,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:51,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966563460] [2021-06-05 04:12:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:51,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:51,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966563460] [2021-06-05 04:12:51,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966563460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:51,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900262116] [2021-06-05 04:12:51,324 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 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 04:12:51,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:12:51,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:51,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:51,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:51,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900262116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:51,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:51,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:12:51,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427122733] [2021-06-05 04:12:51,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:12:51,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:51,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:12:51,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:12:51,379 INFO L87 Difference]: Start difference. First operand 300 states and 887 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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 04:12:51,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:51,526 INFO L93 Difference]: Finished difference Result 433 states and 1094 transitions. [2021-06-05 04:12:51,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:12:51,526 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 04:12:51,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:51,527 INFO L225 Difference]: With dead ends: 433 [2021-06-05 04:12:51,527 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 04:12:51,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:12:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 04:12:51,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 294. [2021-06-05 04:12:51,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:51,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 04:12:51,530 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 18 [2021-06-05 04:12:51,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:51,530 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 04:12:51,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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 04:12:51,530 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 04:12:51,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:51,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:51,531 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:51,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9703,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:51,737 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:51,737 INFO L82 PathProgramCache]: Analyzing trace with hash -654040327, now seen corresponding path program 125 times [2021-06-05 04:12:51,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:51,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543236848] [2021-06-05 04:12:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:51,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:51,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543236848] [2021-06-05 04:12:51,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543236848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:51,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936383254] [2021-06-05 04:12:51,778 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 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 04:12:51,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:12:51,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:51,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:51,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:51,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936383254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:51,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:51,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:12:51,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215432253] [2021-06-05 04:12:51,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:12:51,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:51,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:12:51,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:12:51,833 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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 04:12:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:52,003 INFO L93 Difference]: Finished difference Result 474 states and 1217 transitions. [2021-06-05 04:12:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:12:52,003 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 04:12:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:52,003 INFO L225 Difference]: With dead ends: 474 [2021-06-05 04:12:52,003 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 04:12:52,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:12:52,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 04:12:52,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 298. [2021-06-05 04:12:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9663299663299663) internal successors, (881), 297 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 881 transitions. [2021-06-05 04:12:52,007 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 881 transitions. Word has length 18 [2021-06-05 04:12:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:52,007 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 881 transitions. [2021-06-05 04:12:52,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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 04:12:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 881 transitions. [2021-06-05 04:12:52,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:52,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:52,007 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:52,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9704,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:52,208 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:52,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:52,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1289253300, now seen corresponding path program 126 times [2021-06-05 04:12:52,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:52,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857018764] [2021-06-05 04:12:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:52,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:52,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857018764] [2021-06-05 04:12:52,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857018764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:52,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220033487] [2021-06-05 04:12:52,311 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 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 04:12:52,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:12:52,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:52,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:12:52,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:52,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:52,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:53,493 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 230 [2021-06-05 04:12:53,696 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 234 [2021-06-05 04:12:53,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:53,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:53,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:53,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:53,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220033487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:53,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:53,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:53,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431120650] [2021-06-05 04:12:53,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:53,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:53,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:53,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:53,940 INFO L87 Difference]: Start difference. First operand 298 states and 881 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:54,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:54,401 INFO L93 Difference]: Finished difference Result 381 states and 1116 transitions. [2021-06-05 04:12:54,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:12:54,402 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:54,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:54,402 INFO L225 Difference]: With dead ends: 381 [2021-06-05 04:12:54,402 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 04:12:54,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:12:54,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 04:12:54,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 341. [2021-06-05 04:12:54,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0352941176470587) internal successors, (1032), 340 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:54,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1032 transitions. [2021-06-05 04:12:54,406 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1032 transitions. Word has length 18 [2021-06-05 04:12:54,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:54,406 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1032 transitions. [2021-06-05 04:12:54,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) 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 04:12:54,406 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1032 transitions. [2021-06-05 04:12:54,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:54,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:54,407 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:54,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9705 [2021-06-05 04:12:54,617 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:54,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:54,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1280234538, now seen corresponding path program 127 times [2021-06-05 04:12:54,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:54,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606535485] [2021-06-05 04:12:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:54,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:54,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606535485] [2021-06-05 04:12:54,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606535485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:54,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98753582] [2021-06-05 04:12:54,746 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 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 04:12:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:54,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:12:54,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:55,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:55,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:56,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:56,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:56,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:56,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:56,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98753582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:56,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:56,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:56,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936854817] [2021-06-05 04:12:56,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:56,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:56,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:56,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:56,019 INFO L87 Difference]: Start difference. First operand 341 states and 1032 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:56,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:56,449 INFO L93 Difference]: Finished difference Result 396 states and 1134 transitions. [2021-06-05 04:12:56,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:12:56,449 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:56,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:56,450 INFO L225 Difference]: With dead ends: 396 [2021-06-05 04:12:56,450 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 04:12:56,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 314.2ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:12:56,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 04:12:56,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 341. [2021-06-05 04:12:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0352941176470587) internal successors, (1032), 340 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1032 transitions. [2021-06-05 04:12:56,459 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1032 transitions. Word has length 18 [2021-06-05 04:12:56,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:56,459 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1032 transitions. [2021-06-05 04:12:56,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:56,459 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1032 transitions. [2021-06-05 04:12:56,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:56,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:56,459 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:56,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9894,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:56,661 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:56,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:56,662 INFO L82 PathProgramCache]: Analyzing trace with hash -355789591, now seen corresponding path program 128 times [2021-06-05 04:12:56,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:56,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162287056] [2021-06-05 04:12:56,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:56,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:56,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162287056] [2021-06-05 04:12:56,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162287056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:56,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656209212] [2021-06-05 04:12:56,708 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 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 04:12:56,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:56,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:56,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:56,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:56,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656209212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:56,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:56,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:12:56,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317175237] [2021-06-05 04:12:56,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:56,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:56,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:56,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:56,759 INFO L87 Difference]: Start difference. First operand 341 states and 1032 transitions. Second operand has 11 states, 11 states have (on average 2.0) 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 04:12:56,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:56,815 INFO L93 Difference]: Finished difference Result 539 states and 1358 transitions. [2021-06-05 04:12:56,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:12:56,815 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) 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 18 [2021-06-05 04:12:56,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:56,816 INFO L225 Difference]: With dead ends: 539 [2021-06-05 04:12:56,816 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 04:12:56,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:12:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 04:12:56,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 352. [2021-06-05 04:12:56,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.0484330484330484) internal successors, (1070), 351 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:56,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1070 transitions. [2021-06-05 04:12:56,820 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1070 transitions. Word has length 18 [2021-06-05 04:12:56,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:56,820 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1070 transitions. [2021-06-05 04:12:56,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) 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 04:12:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1070 transitions. [2021-06-05 04:12:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:56,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:56,820 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:57,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10133 [2021-06-05 04:12:57,021 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:57,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1878317903, now seen corresponding path program 129 times [2021-06-05 04:12:57,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:57,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371596273] [2021-06-05 04:12:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:57,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:57,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371596273] [2021-06-05 04:12:57,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371596273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:57,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987671911] [2021-06-05 04:12:57,074 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 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 04:12:57,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:12:57,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:57,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:57,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:57,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987671911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:57,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:57,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:12:57,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774302773] [2021-06-05 04:12:57,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:57,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:57,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:57,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:57,127 INFO L87 Difference]: Start difference. First operand 352 states and 1070 transitions. Second operand has 11 states, 11 states have (on average 2.0) 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 04:12:57,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:57,193 INFO L93 Difference]: Finished difference Result 516 states and 1352 transitions. [2021-06-05 04:12:57,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:12:57,193 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) 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 18 [2021-06-05 04:12:57,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:57,194 INFO L225 Difference]: With dead ends: 516 [2021-06-05 04:12:57,194 INFO L226 Difference]: Without dead ends: 516 [2021-06-05 04:12:57,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:12:57,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-05 04:12:57,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 368. [2021-06-05 04:12:57,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0626702997275204) internal successors, (1124), 367 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:57,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1124 transitions. [2021-06-05 04:12:57,211 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1124 transitions. Word has length 18 [2021-06-05 04:12:57,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:57,211 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1124 transitions. [2021-06-05 04:12:57,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) 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 04:12:57,211 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1124 transitions. [2021-06-05 04:12:57,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:57,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:57,212 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:57,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10134 [2021-06-05 04:12:57,428 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:57,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:57,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1696554154, now seen corresponding path program 130 times [2021-06-05 04:12:57,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:57,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102750408] [2021-06-05 04:12:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:57,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:57,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102750408] [2021-06-05 04:12:57,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102750408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:57,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612042526] [2021-06-05 04:12:57,503 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 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 04:12:57,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:12:57,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:57,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 04:12:57,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:57,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:57,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 04:12:58,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:58,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:58,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:58,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 04:12:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:58,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612042526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:58,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:58,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:12:58,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962468758] [2021-06-05 04:12:58,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:12:58,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:58,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:12:58,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:12:58,174 INFO L87 Difference]: Start difference. First operand 368 states and 1124 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:58,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:58,433 INFO L93 Difference]: Finished difference Result 420 states and 1201 transitions. [2021-06-05 04:12:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:12:58,433 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:58,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:58,434 INFO L225 Difference]: With dead ends: 420 [2021-06-05 04:12:58,434 INFO L226 Difference]: Without dead ends: 415 [2021-06-05 04:12:58,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:12:58,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-05 04:12:58,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 368. [2021-06-05 04:12:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0626702997275204) internal successors, (1124), 367 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:58,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1124 transitions. [2021-06-05 04:12:58,437 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1124 transitions. Word has length 18 [2021-06-05 04:12:58,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:58,438 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1124 transitions. [2021-06-05 04:12:58,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 04:12:58,438 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1124 transitions. [2021-06-05 04:12:58,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:58,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:58,438 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:58,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10135 [2021-06-05 04:12:58,649 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:58,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1878793815, now seen corresponding path program 131 times [2021-06-05 04:12:58,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:58,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254050669] [2021-06-05 04:12:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:58,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:58,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254050669] [2021-06-05 04:12:58,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254050669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:58,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198271064] [2021-06-05 04:12:58,692 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 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 04:12:58,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:12:58,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:58,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:58,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:12:58,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198271064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:58,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:58,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:12:58,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923341901] [2021-06-05 04:12:58,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:12:58,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:58,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:12:58,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:12:58,743 INFO L87 Difference]: Start difference. First operand 368 states and 1124 transitions. Second operand has 11 states, 11 states have (on average 2.0) 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 04:12:58,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:58,798 INFO L93 Difference]: Finished difference Result 489 states and 1363 transitions. [2021-06-05 04:12:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:12:58,798 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) 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 18 [2021-06-05 04:12:58,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:58,798 INFO L225 Difference]: With dead ends: 489 [2021-06-05 04:12:58,798 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 04:12:58,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:12:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 04:12:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 401. [2021-06-05 04:12:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.0625) internal successors, (1225), 400 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1225 transitions. [2021-06-05 04:12:58,803 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1225 transitions. Word has length 18 [2021-06-05 04:12:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:58,803 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1225 transitions. [2021-06-05 04:12:58,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) 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 04:12:58,803 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1225 transitions. [2021-06-05 04:12:58,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:58,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:58,804 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:59,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10244 [2021-06-05 04:12:59,004 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:59,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:59,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1909827215, now seen corresponding path program 132 times [2021-06-05 04:12:59,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:59,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193781531] [2021-06-05 04:12:59,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:59,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:59,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193781531] [2021-06-05 04:12:59,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193781531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:59,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577806142] [2021-06-05 04:12:59,046 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 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 04:12:59,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:12:59,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:59,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:59,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:59,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577806142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:59,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:59,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:12:59,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926345573] [2021-06-05 04:12:59,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:12:59,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:59,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:12:59,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:12:59,108 INFO L87 Difference]: Start difference. First operand 401 states and 1225 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:12:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:59,202 INFO L93 Difference]: Finished difference Result 521 states and 1410 transitions. [2021-06-05 04:12:59,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:12:59,203 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 18 [2021-06-05 04:12:59,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:59,203 INFO L225 Difference]: With dead ends: 521 [2021-06-05 04:12:59,203 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 04:12:59,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:12:59,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 04:12:59,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 397. [2021-06-05 04:12:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.0606060606060606) internal successors, (1212), 396 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:59,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1212 transitions. [2021-06-05 04:12:59,207 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1212 transitions. Word has length 18 [2021-06-05 04:12:59,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:59,208 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1212 transitions. [2021-06-05 04:12:59,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:12:59,208 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1212 transitions. [2021-06-05 04:12:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:59,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:59,208 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:59,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10245 [2021-06-05 04:12:59,409 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:59,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:59,409 INFO L82 PathProgramCache]: Analyzing trace with hash -902005143, now seen corresponding path program 133 times [2021-06-05 04:12:59,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:59,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431080566] [2021-06-05 04:12:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:59,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:59,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431080566] [2021-06-05 04:12:59,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431080566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:59,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740211765] [2021-06-05 04:12:59,451 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 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 04:12:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:59,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:59,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:59,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740211765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:59,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:59,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:12:59,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435265908] [2021-06-05 04:12:59,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:12:59,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:59,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:12:59,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:12:59,507 INFO L87 Difference]: Start difference. First operand 397 states and 1212 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:12:59,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:59,632 INFO L93 Difference]: Finished difference Result 501 states and 1377 transitions. [2021-06-05 04:12:59,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:12:59,632 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 18 [2021-06-05 04:12:59,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:59,633 INFO L225 Difference]: With dead ends: 501 [2021-06-05 04:12:59,633 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 04:12:59,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:12:59,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 04:12:59,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 394. [2021-06-05 04:12:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0610687022900764) internal successors, (1203), 393 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:59,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1203 transitions. [2021-06-05 04:12:59,637 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1203 transitions. Word has length 18 [2021-06-05 04:12:59,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:59,637 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1203 transitions. [2021-06-05 04:12:59,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:12:59,637 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1203 transitions. [2021-06-05 04:12:59,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:12:59,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:59,638 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:59,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10246 [2021-06-05 04:12:59,853 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:59,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:59,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2125504975, now seen corresponding path program 134 times [2021-06-05 04:12:59,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:59,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730366262] [2021-06-05 04:12:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:59,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:59,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730366262] [2021-06-05 04:12:59,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730366262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:59,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556659666] [2021-06-05 04:12:59,896 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:59,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:59,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:59,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:12:59,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:59,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556659666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:59,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:59,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:12:59,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845762392] [2021-06-05 04:12:59,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:12:59,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:59,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:12:59,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:12:59,957 INFO L87 Difference]: Start difference. First operand 394 states and 1203 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:00,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:00,080 INFO L93 Difference]: Finished difference Result 512 states and 1422 transitions. [2021-06-05 04:13:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:13:00,081 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 18 [2021-06-05 04:13:00,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:00,081 INFO L225 Difference]: With dead ends: 512 [2021-06-05 04:13:00,081 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 04:13:00,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:13:00,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 04:13:00,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 394. [2021-06-05 04:13:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0610687022900764) internal successors, (1203), 393 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:00,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1203 transitions. [2021-06-05 04:13:00,085 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1203 transitions. Word has length 18 [2021-06-05 04:13:00,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:00,085 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1203 transitions. [2021-06-05 04:13:00,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:00,086 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1203 transitions. [2021-06-05 04:13:00,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:13:00,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:00,086 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:00,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10247,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:00,286 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:00,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:00,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1489038121, now seen corresponding path program 135 times [2021-06-05 04:13:00,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:00,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14268357] [2021-06-05 04:13:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:00,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:00,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14268357] [2021-06-05 04:13:00,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14268357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:00,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744928199] [2021-06-05 04:13:00,336 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 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 04:13:00,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:13:00,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:00,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:13:00,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:00,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744928199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:00,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:00,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:13:00,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821842874] [2021-06-05 04:13:00,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:00,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:00,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:00,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:00,390 INFO L87 Difference]: Start difference. First operand 394 states and 1203 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:00,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:00,511 INFO L93 Difference]: Finished difference Result 594 states and 1635 transitions. [2021-06-05 04:13:00,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:13:00,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 18 [2021-06-05 04:13:00,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:00,512 INFO L225 Difference]: With dead ends: 594 [2021-06-05 04:13:00,512 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 04:13:00,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:13:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 04:13:00,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 403. [2021-06-05 04:13:00,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.0597014925373136) internal successors, (1230), 402 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1230 transitions. [2021-06-05 04:13:00,517 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1230 transitions. Word has length 18 [2021-06-05 04:13:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:00,517 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1230 transitions. [2021-06-05 04:13:00,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:00,517 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1230 transitions. [2021-06-05 04:13:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:00,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:00,517 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:00,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10248 [2021-06-05 04:13:00,733 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash 610808602, now seen corresponding path program 136 times [2021-06-05 04:13:00,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:00,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365465412] [2021-06-05 04:13:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:00,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:00,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365465412] [2021-06-05 04:13:00,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365465412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:00,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037743910] [2021-06-05 04:13:00,780 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 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 04:13:00,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:00,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:00,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:00,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:00,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037743910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:00,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:00,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:00,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417988270] [2021-06-05 04:13:00,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:00,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:00,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:00,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:00,836 INFO L87 Difference]: Start difference. First operand 403 states and 1230 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:00,938 INFO L93 Difference]: Finished difference Result 532 states and 1448 transitions. [2021-06-05 04:13:00,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:13:00,938 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-06-05 04:13:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:00,939 INFO L225 Difference]: With dead ends: 532 [2021-06-05 04:13:00,939 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 04:13:00,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:13:00,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 04:13:00,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 415. [2021-06-05 04:13:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.07487922705314) internal successors, (1273), 414 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:00,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1273 transitions. [2021-06-05 04:13:00,943 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1273 transitions. Word has length 19 [2021-06-05 04:13:00,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:00,944 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1273 transitions. [2021-06-05 04:13:00,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1273 transitions. [2021-06-05 04:13:00,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:00,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:00,944 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:01,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10249 [2021-06-05 04:13:01,145 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:01,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:01,145 INFO L82 PathProgramCache]: Analyzing trace with hash 522898661, now seen corresponding path program 137 times [2021-06-05 04:13:01,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:01,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919131567] [2021-06-05 04:13:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:01,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:01,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919131567] [2021-06-05 04:13:01,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919131567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:01,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653678046] [2021-06-05 04:13:01,192 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 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 04:13:01,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:13:01,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:01,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:01,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:01,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653678046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:01,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:01,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:01,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382854429] [2021-06-05 04:13:01,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:01,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:01,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:01,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:01,244 INFO L87 Difference]: Start difference. First operand 415 states and 1273 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:01,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:01,420 INFO L93 Difference]: Finished difference Result 606 states and 1593 transitions. [2021-06-05 04:13:01,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:13:01,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-06-05 04:13:01,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:01,421 INFO L225 Difference]: With dead ends: 606 [2021-06-05 04:13:01,421 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 04:13:01,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:13:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 04:13:01,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 419. [2021-06-05 04:13:01,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.0717703349282295) internal successors, (1284), 418 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:01,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1284 transitions. [2021-06-05 04:13:01,426 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1284 transitions. Word has length 19 [2021-06-05 04:13:01,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:01,426 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1284 transitions. [2021-06-05 04:13:01,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:01,426 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1284 transitions. [2021-06-05 04:13:01,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:01,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:01,426 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:01,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10250,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:01,627 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:01,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:01,627 INFO L82 PathProgramCache]: Analyzing trace with hash -544341384, now seen corresponding path program 138 times [2021-06-05 04:13:01,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:01,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788200891] [2021-06-05 04:13:01,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:01,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:01,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788200891] [2021-06-05 04:13:01,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788200891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:01,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264969260] [2021-06-05 04:13:01,669 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 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 04:13:01,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:13:01,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:01,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:01,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:01,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264969260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:01,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:01,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:13:01,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141086201] [2021-06-05 04:13:01,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:01,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:01,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:01,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:01,721 INFO L87 Difference]: Start difference. First operand 419 states and 1284 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:01,843 INFO L93 Difference]: Finished difference Result 466 states and 1355 transitions. [2021-06-05 04:13:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:13:01,843 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-06-05 04:13:01,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:01,844 INFO L225 Difference]: With dead ends: 466 [2021-06-05 04:13:01,844 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 04:13:01,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:13:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 04:13:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 421. [2021-06-05 04:13:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.057142857142857) internal successors, (1284), 420 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1284 transitions. [2021-06-05 04:13:01,848 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1284 transitions. Word has length 19 [2021-06-05 04:13:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:01,848 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1284 transitions. [2021-06-05 04:13:01,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:01,848 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1284 transitions. [2021-06-05 04:13:01,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:01,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:01,849 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:02,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10251,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:02,049 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:02,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:02,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2114601783, now seen corresponding path program 139 times [2021-06-05 04:13:02,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:02,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749674948] [2021-06-05 04:13:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:02,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:02,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749674948] [2021-06-05 04:13:02,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749674948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:02,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319020958] [2021-06-05 04:13:02,096 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 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 04:13:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:02,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:02,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:02,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319020958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:02,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:02,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:13:02,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346325037] [2021-06-05 04:13:02,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:02,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:02,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:02,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:02,152 INFO L87 Difference]: Start difference. First operand 421 states and 1284 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:02,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:02,212 INFO L93 Difference]: Finished difference Result 597 states and 1562 transitions. [2021-06-05 04:13:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:13:02,212 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-06-05 04:13:02,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:02,213 INFO L225 Difference]: With dead ends: 597 [2021-06-05 04:13:02,213 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 04:13:02,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:02,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 04:13:02,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 407. [2021-06-05 04:13:02,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0320197044334973) internal successors, (1231), 406 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1231 transitions. [2021-06-05 04:13:02,218 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1231 transitions. Word has length 19 [2021-06-05 04:13:02,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:02,218 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1231 transitions. [2021-06-05 04:13:02,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:02,218 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1231 transitions. [2021-06-05 04:13:02,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:02,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:02,218 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:02,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10252,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:02,419 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:02,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:02,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1564318246, now seen corresponding path program 140 times [2021-06-05 04:13:02,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:02,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866398707] [2021-06-05 04:13:02,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:02,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:02,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866398707] [2021-06-05 04:13:02,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866398707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:02,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371447907] [2021-06-05 04:13:02,461 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 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 04:13:02,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:02,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:02,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:02,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:02,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371447907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:02,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:02,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:13:02,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084707165] [2021-06-05 04:13:02,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:02,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:02,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:02,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:02,511 INFO L87 Difference]: Start difference. First operand 407 states and 1231 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:02,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:02,612 INFO L93 Difference]: Finished difference Result 489 states and 1403 transitions. [2021-06-05 04:13:02,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:13:02,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-06-05 04:13:02,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:02,613 INFO L225 Difference]: With dead ends: 489 [2021-06-05 04:13:02,613 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 04:13:02,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:13:02,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 04:13:02,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 418. [2021-06-05 04:13:02,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.0239808153477217) internal successors, (1261), 417 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:02,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1261 transitions. [2021-06-05 04:13:02,618 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1261 transitions. Word has length 19 [2021-06-05 04:13:02,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:02,618 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1261 transitions. [2021-06-05 04:13:02,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:02,618 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1261 transitions. [2021-06-05 04:13:02,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:02,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:02,618 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:02,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10253,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:02,833 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:02,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:02,833 INFO L82 PathProgramCache]: Analyzing trace with hash 672996615, now seen corresponding path program 141 times [2021-06-05 04:13:02,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:02,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560948921] [2021-06-05 04:13:02,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:02,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:02,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560948921] [2021-06-05 04:13:02,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560948921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:02,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454159861] [2021-06-05 04:13:02,873 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 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 04:13:02,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:13:02,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:02,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:02,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:02,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454159861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:02,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:02,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:13:02,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994127205] [2021-06-05 04:13:02,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:02,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:02,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:02,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:02,931 INFO L87 Difference]: Start difference. First operand 418 states and 1261 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:03,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:03,000 INFO L93 Difference]: Finished difference Result 636 states and 1639 transitions. [2021-06-05 04:13:03,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:13:03,001 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-06-05 04:13:03,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:03,002 INFO L225 Difference]: With dead ends: 636 [2021-06-05 04:13:03,002 INFO L226 Difference]: Without dead ends: 636 [2021-06-05 04:13:03,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:13:03,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-05 04:13:03,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 405. [2021-06-05 04:13:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.0024752475247523) internal successors, (1213), 404 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1213 transitions. [2021-06-05 04:13:03,007 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1213 transitions. Word has length 19 [2021-06-05 04:13:03,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:03,007 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1213 transitions. [2021-06-05 04:13:03,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1213 transitions. [2021-06-05 04:13:03,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:03,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:03,008 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:03,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10254 [2021-06-05 04:13:03,208 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:03,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:03,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1786709960, now seen corresponding path program 142 times [2021-06-05 04:13:03,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:03,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815756676] [2021-06-05 04:13:03,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:03,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:03,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815756676] [2021-06-05 04:13:03,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815756676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:03,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008219671] [2021-06-05 04:13:03,250 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 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 04:13:03,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:03,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:03,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:03,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:03,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008219671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:03,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:03,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:13:03,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889753417] [2021-06-05 04:13:03,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:03,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:03,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:03,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:03,302 INFO L87 Difference]: Start difference. First operand 405 states and 1213 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:03,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:03,404 INFO L93 Difference]: Finished difference Result 488 states and 1377 transitions. [2021-06-05 04:13:03,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:13:03,404 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-06-05 04:13:03,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:03,405 INFO L225 Difference]: With dead ends: 488 [2021-06-05 04:13:03,405 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 04:13:03,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:13:03,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 04:13:03,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 409. [2021-06-05 04:13:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.9901960784313726) internal successors, (1220), 408 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1220 transitions. [2021-06-05 04:13:03,410 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1220 transitions. Word has length 19 [2021-06-05 04:13:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:03,410 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1220 transitions. [2021-06-05 04:13:03,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1220 transitions. [2021-06-05 04:13:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:03,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:03,412 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:03,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10255 [2021-06-05 04:13:03,617 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:03,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:03,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1067090633, now seen corresponding path program 143 times [2021-06-05 04:13:03,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:03,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741686654] [2021-06-05 04:13:03,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:03,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:03,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741686654] [2021-06-05 04:13:03,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741686654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:03,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426471297] [2021-06-05 04:13:03,674 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 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 04:13:03,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:13:03,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:03,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:03,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:03,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426471297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:03,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:03,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:13:03,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256848077] [2021-06-05 04:13:03,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:03,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:03,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:03,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:03,740 INFO L87 Difference]: Start difference. First operand 409 states and 1220 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:03,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:03,830 INFO L93 Difference]: Finished difference Result 668 states and 1705 transitions. [2021-06-05 04:13:03,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:13:03,830 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-06-05 04:13:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:03,831 INFO L225 Difference]: With dead ends: 668 [2021-06-05 04:13:03,831 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 04:13:03,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:13:03,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 04:13:03,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 429. [2021-06-05 04:13:03,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.0163551401869158) internal successors, (1291), 428 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:03,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1291 transitions. [2021-06-05 04:13:03,836 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1291 transitions. Word has length 19 [2021-06-05 04:13:03,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:03,836 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1291 transitions. [2021-06-05 04:13:03,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1291 transitions. [2021-06-05 04:13:03,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:03,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:03,836 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:04,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10256 [2021-06-05 04:13:04,037 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:04,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:04,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1705598054, now seen corresponding path program 144 times [2021-06-05 04:13:04,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:04,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250619011] [2021-06-05 04:13:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:04,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:04,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250619011] [2021-06-05 04:13:04,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250619011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:04,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872328082] [2021-06-05 04:13:04,083 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 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 04:13:04,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:13:04,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:04,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:04,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:04,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872328082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:04,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:04,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:04,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960397847] [2021-06-05 04:13:04,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:04,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:04,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:04,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:04,151 INFO L87 Difference]: Start difference. First operand 429 states and 1291 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:04,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:04,243 INFO L93 Difference]: Finished difference Result 521 states and 1480 transitions. [2021-06-05 04:13:04,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:13:04,243 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-06-05 04:13:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:04,244 INFO L225 Difference]: With dead ends: 521 [2021-06-05 04:13:04,244 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 04:13:04,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:13:04,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 04:13:04,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 427. [2021-06-05 04:13:04,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0211267605633805) internal successors, (1287), 426 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1287 transitions. [2021-06-05 04:13:04,248 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1287 transitions. Word has length 19 [2021-06-05 04:13:04,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:04,248 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1287 transitions. [2021-06-05 04:13:04,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:04,248 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1287 transitions. [2021-06-05 04:13:04,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:04,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:04,249 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:04,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10257 [2021-06-05 04:13:04,449 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:04,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:04,450 INFO L82 PathProgramCache]: Analyzing trace with hash 824779527, now seen corresponding path program 145 times [2021-06-05 04:13:04,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:04,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834890655] [2021-06-05 04:13:04,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:04,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:04,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834890655] [2021-06-05 04:13:04,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834890655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:04,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326121490] [2021-06-05 04:13:04,494 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 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 04:13:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:04,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:04,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:04,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326121490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:04,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:04,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:04,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686221835] [2021-06-05 04:13:04,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:04,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:04,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:04,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:04,548 INFO L87 Difference]: Start difference. First operand 427 states and 1287 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:04,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:04,672 INFO L93 Difference]: Finished difference Result 690 states and 1758 transitions. [2021-06-05 04:13:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:13:04,673 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-06-05 04:13:04,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:04,673 INFO L225 Difference]: With dead ends: 690 [2021-06-05 04:13:04,673 INFO L226 Difference]: Without dead ends: 690 [2021-06-05 04:13:04,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:13:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-06-05 04:13:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 427. [2021-06-05 04:13:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0211267605633805) internal successors, (1287), 426 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1287 transitions. [2021-06-05 04:13:04,678 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1287 transitions. Word has length 19 [2021-06-05 04:13:04,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:04,678 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1287 transitions. [2021-06-05 04:13:04,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:04,678 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1287 transitions. [2021-06-05 04:13:04,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:04,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:04,679 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:04,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10258 [2021-06-05 04:13:04,879 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:04,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:04,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1044035814, now seen corresponding path program 146 times [2021-06-05 04:13:04,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:04,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444419410] [2021-06-05 04:13:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:13:04,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:04,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444419410] [2021-06-05 04:13:04,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444419410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:04,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314016655] [2021-06-05 04:13:04,912 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 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 04:13:04,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:04,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:04,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:04,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:13:04,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314016655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:04,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:04,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:13:04,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157230059] [2021-06-05 04:13:04,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:13:04,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:04,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:13:04,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:13:04,963 INFO L87 Difference]: Start difference. First operand 427 states and 1287 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 04:13:05,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:05,014 INFO L93 Difference]: Finished difference Result 587 states and 1642 transitions. [2021-06-05 04:13:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:13:05,015 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 19 [2021-06-05 04:13:05,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:05,015 INFO L225 Difference]: With dead ends: 587 [2021-06-05 04:13:05,015 INFO L226 Difference]: Without dead ends: 587 [2021-06-05 04:13:05,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:13:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-06-05 04:13:05,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 451. [2021-06-05 04:13:05,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.0644444444444443) internal successors, (1379), 450 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1379 transitions. [2021-06-05 04:13:05,020 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1379 transitions. Word has length 19 [2021-06-05 04:13:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:05,020 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1379 transitions. [2021-06-05 04:13:05,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 04:13:05,020 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1379 transitions. [2021-06-05 04:13:05,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:05,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:05,021 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:05,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10259,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:05,221 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:05,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:05,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1821185413, now seen corresponding path program 147 times [2021-06-05 04:13:05,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:05,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706494531] [2021-06-05 04:13:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:13:05,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:05,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706494531] [2021-06-05 04:13:05,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706494531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:05,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924195791] [2021-06-05 04:13:05,248 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 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 04:13:05,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:13:05,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:05,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:05,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:13:05,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924195791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:05,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:05,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:13:05,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277332659] [2021-06-05 04:13:05,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:13:05,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:05,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:13:05,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:13:05,298 INFO L87 Difference]: Start difference. First operand 451 states and 1379 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 04:13:05,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:05,380 INFO L93 Difference]: Finished difference Result 581 states and 1594 transitions. [2021-06-05 04:13:05,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:13:05,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 19 [2021-06-05 04:13:05,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:05,381 INFO L225 Difference]: With dead ends: 581 [2021-06-05 04:13:05,382 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 04:13:05,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:13:05,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 04:13:05,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 466. [2021-06-05 04:13:05,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0709677419354837) internal successors, (1428), 465 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:05,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1428 transitions. [2021-06-05 04:13:05,386 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1428 transitions. Word has length 19 [2021-06-05 04:13:05,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:05,386 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1428 transitions. [2021-06-05 04:13:05,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 04:13:05,386 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1428 transitions. [2021-06-05 04:13:05,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:05,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:05,387 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:05,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10260,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:05,601 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:05,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:05,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2123535389, now seen corresponding path program 148 times [2021-06-05 04:13:05,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:05,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551811235] [2021-06-05 04:13:05,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:05,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:05,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551811235] [2021-06-05 04:13:05,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551811235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:05,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293665537] [2021-06-05 04:13:05,640 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 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 04:13:05,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:05,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:05,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:05,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:13:05,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293665537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:05,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:05,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:13:05,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438623160] [2021-06-05 04:13:05,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:13:05,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:05,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:13:05,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:13:05,707 INFO L87 Difference]: Start difference. First operand 466 states and 1428 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:13:05,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:05,760 INFO L93 Difference]: Finished difference Result 595 states and 1618 transitions. [2021-06-05 04:13:05,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:13:05,760 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-06-05 04:13:05,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:05,761 INFO L225 Difference]: With dead ends: 595 [2021-06-05 04:13:05,761 INFO L226 Difference]: Without dead ends: 595 [2021-06-05 04:13:05,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:05,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-05 04:13:05,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 465. [2021-06-05 04:13:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0689655172413794) internal successors, (1424), 464 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:05,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1424 transitions. [2021-06-05 04:13:05,766 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1424 transitions. Word has length 19 [2021-06-05 04:13:05,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:05,766 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1424 transitions. [2021-06-05 04:13:05,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:13:05,766 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1424 transitions. [2021-06-05 04:13:05,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:05,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:05,766 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:05,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10261,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:05,967 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:05,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:05,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1633576329, now seen corresponding path program 149 times [2021-06-05 04:13:05,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:05,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501105321] [2021-06-05 04:13:05,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:06,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:06,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501105321] [2021-06-05 04:13:06,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501105321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:06,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131365408] [2021-06-05 04:13:06,003 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 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 04:13:06,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:13:06,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:06,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:06,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:06,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131365408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:06,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:06,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:13:06,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537423890] [2021-06-05 04:13:06,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:13:06,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:06,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:13:06,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:13:06,062 INFO L87 Difference]: Start difference. First operand 465 states and 1424 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:13:06,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:06,141 INFO L93 Difference]: Finished difference Result 631 states and 1678 transitions. [2021-06-05 04:13:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:13:06,141 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 19 [2021-06-05 04:13:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:06,142 INFO L225 Difference]: With dead ends: 631 [2021-06-05 04:13:06,142 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 04:13:06,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:13:06,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 04:13:06,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 465. [2021-06-05 04:13:06,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0689655172413794) internal successors, (1424), 464 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1424 transitions. [2021-06-05 04:13:06,147 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1424 transitions. Word has length 19 [2021-06-05 04:13:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:06,147 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1424 transitions. [2021-06-05 04:13:06,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:13:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1424 transitions. [2021-06-05 04:13:06,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:06,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:06,148 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:06,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10262,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:06,348 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:06,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:06,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1259104068, now seen corresponding path program 150 times [2021-06-05 04:13:06,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:06,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551950649] [2021-06-05 04:13:06,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:06,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:06,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551950649] [2021-06-05 04:13:06,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551950649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:06,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714570086] [2021-06-05 04:13:06,391 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 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 04:13:06,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:13:06,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:06,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:06,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:06,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714570086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:06,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:06,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:06,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318952642] [2021-06-05 04:13:06,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:06,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:06,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:06,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:06,441 INFO L87 Difference]: Start difference. First operand 465 states and 1424 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:06,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:06,549 INFO L93 Difference]: Finished difference Result 578 states and 1659 transitions. [2021-06-05 04:13:06,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:13:06,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-06-05 04:13:06,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:06,550 INFO L225 Difference]: With dead ends: 578 [2021-06-05 04:13:06,550 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 04:13:06,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:13:06,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 04:13:06,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 469. [2021-06-05 04:13:06,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0619658119658117) internal successors, (1433), 468 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:06,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1433 transitions. [2021-06-05 04:13:06,555 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1433 transitions. Word has length 19 [2021-06-05 04:13:06,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:06,555 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1433 transitions. [2021-06-05 04:13:06,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:06,555 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1433 transitions. [2021-06-05 04:13:06,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:06,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:06,556 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:06,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10263 [2021-06-05 04:13:06,756 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:06,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:06,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2139922595, now seen corresponding path program 151 times [2021-06-05 04:13:06,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:06,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762078078] [2021-06-05 04:13:06,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:06,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:06,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762078078] [2021-06-05 04:13:06,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762078078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:06,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29849904] [2021-06-05 04:13:06,798 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 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 04:13:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:06,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:06,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:06,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29849904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:06,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:06,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:06,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386809914] [2021-06-05 04:13:06,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:06,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:06,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:06,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:06,849 INFO L87 Difference]: Start difference. First operand 469 states and 1433 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:06,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:06,977 INFO L93 Difference]: Finished difference Result 678 states and 1771 transitions. [2021-06-05 04:13:06,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:13:06,978 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-06-05 04:13:06,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:06,978 INFO L225 Difference]: With dead ends: 678 [2021-06-05 04:13:06,978 INFO L226 Difference]: Without dead ends: 678 [2021-06-05 04:13:06,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:13:06,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-05 04:13:06,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 469. [2021-06-05 04:13:06,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0619658119658117) internal successors, (1433), 468 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1433 transitions. [2021-06-05 04:13:06,984 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1433 transitions. Word has length 19 [2021-06-05 04:13:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:06,984 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1433 transitions. [2021-06-05 04:13:06,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1433 transitions. [2021-06-05 04:13:06,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:06,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:06,984 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:07,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10264 [2021-06-05 04:13:07,185 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:07,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:07,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1702003208, now seen corresponding path program 152 times [2021-06-05 04:13:07,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:07,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480980604] [2021-06-05 04:13:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:07,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:07,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480980604] [2021-06-05 04:13:07,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480980604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:07,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140664976] [2021-06-05 04:13:07,231 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 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 04:13:07,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:07,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:07,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:07,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:07,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140664976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:07,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:07,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:07,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186970152] [2021-06-05 04:13:07,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:07,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:07,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:07,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:07,299 INFO L87 Difference]: Start difference. First operand 469 states and 1433 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:07,402 INFO L93 Difference]: Finished difference Result 606 states and 1712 transitions. [2021-06-05 04:13:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:13:07,403 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-06-05 04:13:07,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:07,403 INFO L225 Difference]: With dead ends: 606 [2021-06-05 04:13:07,403 INFO L226 Difference]: Without dead ends: 596 [2021-06-05 04:13:07,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:13:07,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-06-05 04:13:07,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 477. [2021-06-05 04:13:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.03781512605042) internal successors, (1446), 476 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:07,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1446 transitions. [2021-06-05 04:13:07,408 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1446 transitions. Word has length 19 [2021-06-05 04:13:07,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:07,408 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1446 transitions. [2021-06-05 04:13:07,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:07,409 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1446 transitions. [2021-06-05 04:13:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:07,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:07,409 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:07,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10265,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:07,610 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:07,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:07,610 INFO L82 PathProgramCache]: Analyzing trace with hash -656787657, now seen corresponding path program 153 times [2021-06-05 04:13:07,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:07,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407328584] [2021-06-05 04:13:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:07,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:07,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407328584] [2021-06-05 04:13:07,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407328584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:07,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603623030] [2021-06-05 04:13:07,655 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 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 04:13:07,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:13:07,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:07,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:07,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:07,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603623030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:07,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:07,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:07,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886319211] [2021-06-05 04:13:07,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:07,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:07,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:07,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:07,714 INFO L87 Difference]: Start difference. First operand 477 states and 1446 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:07,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:07,894 INFO L93 Difference]: Finished difference Result 741 states and 1915 transitions. [2021-06-05 04:13:07,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:13:07,894 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-06-05 04:13:07,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:07,895 INFO L225 Difference]: With dead ends: 741 [2021-06-05 04:13:07,895 INFO L226 Difference]: Without dead ends: 741 [2021-06-05 04:13:07,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:13:07,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-06-05 04:13:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 466. [2021-06-05 04:13:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0279569892473117) internal successors, (1408), 465 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:07,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1408 transitions. [2021-06-05 04:13:07,900 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1408 transitions. Word has length 19 [2021-06-05 04:13:07,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:07,900 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1408 transitions. [2021-06-05 04:13:07,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:07,900 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1408 transitions. [2021-06-05 04:13:07,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:07,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:07,901 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:08,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10266 [2021-06-05 04:13:08,101 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:08,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1539478916, now seen corresponding path program 154 times [2021-06-05 04:13:08,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:08,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884566563] [2021-06-05 04:13:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:08,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:08,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884566563] [2021-06-05 04:13:08,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884566563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:08,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614030926] [2021-06-05 04:13:08,154 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 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 04:13:08,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:08,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:08,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:08,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:13:08,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614030926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:08,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:08,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:13:08,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088142758] [2021-06-05 04:13:08,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:13:08,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:08,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:13:08,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:13:08,206 INFO L87 Difference]: Start difference. First operand 466 states and 1408 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:13:08,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:08,264 INFO L93 Difference]: Finished difference Result 658 states and 1841 transitions. [2021-06-05 04:13:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:13:08,265 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-06-05 04:13:08,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:08,265 INFO L225 Difference]: With dead ends: 658 [2021-06-05 04:13:08,265 INFO L226 Difference]: Without dead ends: 658 [2021-06-05 04:13:08,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:13:08,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-06-05 04:13:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 506. [2021-06-05 04:13:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.091089108910891) internal successors, (1561), 505 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1561 transitions. [2021-06-05 04:13:08,271 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1561 transitions. Word has length 19 [2021-06-05 04:13:08,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:08,271 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1561 transitions. [2021-06-05 04:13:08,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:13:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1561 transitions. [2021-06-05 04:13:08,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:08,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:08,272 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:08,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10267 [2021-06-05 04:13:08,473 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:08,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:08,473 INFO L82 PathProgramCache]: Analyzing trace with hash 762329317, now seen corresponding path program 155 times [2021-06-05 04:13:08,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:08,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902938205] [2021-06-05 04:13:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:08,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:08,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902938205] [2021-06-05 04:13:08,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902938205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:08,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664173416] [2021-06-05 04:13:08,503 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 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 04:13:08,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:13:08,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:08,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:08,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:13:08,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664173416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:08,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:08,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:13:08,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882816341] [2021-06-05 04:13:08,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:13:08,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:08,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:13:08,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:13:08,551 INFO L87 Difference]: Start difference. First operand 506 states and 1561 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:13:08,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:08,643 INFO L93 Difference]: Finished difference Result 668 states and 1844 transitions. [2021-06-05 04:13:08,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:13:08,643 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-06-05 04:13:08,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:08,644 INFO L225 Difference]: With dead ends: 668 [2021-06-05 04:13:08,644 INFO L226 Difference]: Without dead ends: 666 [2021-06-05 04:13:08,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:08,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-05 04:13:08,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 524. [2021-06-05 04:13:08,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.108986615678776) internal successors, (1626), 523 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1626 transitions. [2021-06-05 04:13:08,650 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1626 transitions. Word has length 19 [2021-06-05 04:13:08,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:08,650 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1626 transitions. [2021-06-05 04:13:08,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:13:08,650 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1626 transitions. [2021-06-05 04:13:08,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:08,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:08,650 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:08,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10268 [2021-06-05 04:13:08,851 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:08,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:08,851 INFO L82 PathProgramCache]: Analyzing trace with hash -186000542, now seen corresponding path program 156 times [2021-06-05 04:13:08,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:08,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143540099] [2021-06-05 04:13:08,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:08,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:08,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143540099] [2021-06-05 04:13:08,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143540099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:08,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491734143] [2021-06-05 04:13:08,883 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 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 04:13:08,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:13:08,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:08,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:08,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:13:08,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491734143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:08,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:08,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:13:08,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664544712] [2021-06-05 04:13:08,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:13:08,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:08,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:13:08,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:13:08,933 INFO L87 Difference]: Start difference. First operand 524 states and 1626 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:13:09,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:09,020 INFO L93 Difference]: Finished difference Result 664 states and 1886 transitions. [2021-06-05 04:13:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:13:09,020 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-06-05 04:13:09,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:09,021 INFO L225 Difference]: With dead ends: 664 [2021-06-05 04:13:09,021 INFO L226 Difference]: Without dead ends: 662 [2021-06-05 04:13:09,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:09,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-05 04:13:09,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 524. [2021-06-05 04:13:09,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.107074569789675) internal successors, (1625), 523 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:09,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1625 transitions. [2021-06-05 04:13:09,027 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1625 transitions. Word has length 19 [2021-06-05 04:13:09,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:09,027 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1625 transitions. [2021-06-05 04:13:09,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:13:09,027 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1625 transitions. [2021-06-05 04:13:09,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:09,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:09,028 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:09,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10269,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:09,228 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:09,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:09,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1822024671, now seen corresponding path program 157 times [2021-06-05 04:13:09,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:09,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840831193] [2021-06-05 04:13:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:09,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:09,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840831193] [2021-06-05 04:13:09,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840831193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:09,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950389132] [2021-06-05 04:13:09,259 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 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 04:13:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:09,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:09,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:13:09,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950389132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:09,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:09,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:13:09,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372722981] [2021-06-05 04:13:09,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:13:09,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:09,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:13:09,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:13:09,309 INFO L87 Difference]: Start difference. First operand 524 states and 1625 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:13:09,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:09,358 INFO L93 Difference]: Finished difference Result 657 states and 1827 transitions. [2021-06-05 04:13:09,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:13:09,358 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-06-05 04:13:09,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:09,359 INFO L225 Difference]: With dead ends: 657 [2021-06-05 04:13:09,359 INFO L226 Difference]: Without dead ends: 657 [2021-06-05 04:13:09,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:09,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-06-05 04:13:09,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 524. [2021-06-05 04:13:09,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.1032504780114722) internal successors, (1623), 523 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1623 transitions. [2021-06-05 04:13:09,368 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1623 transitions. Word has length 19 [2021-06-05 04:13:09,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:09,368 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1623 transitions. [2021-06-05 04:13:09,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 04:13:09,368 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1623 transitions. [2021-06-05 04:13:09,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:09,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:09,369 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:09,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10270 [2021-06-05 04:13:09,569 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:09,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:09,570 INFO L82 PathProgramCache]: Analyzing trace with hash 949938401, now seen corresponding path program 158 times [2021-06-05 04:13:09,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:09,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248854414] [2021-06-05 04:13:09,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:09,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:09,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248854414] [2021-06-05 04:13:09,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248854414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:09,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718329067] [2021-06-05 04:13:09,605 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 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 04:13:09,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:09,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:09,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:09,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:09,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718329067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:09,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:09,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:13:09,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064894685] [2021-06-05 04:13:09,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:13:09,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:09,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:13:09,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:13:09,656 INFO L87 Difference]: Start difference. First operand 524 states and 1623 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:13:09,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:09,723 INFO L93 Difference]: Finished difference Result 654 states and 1817 transitions. [2021-06-05 04:13:09,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:13:09,723 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 19 [2021-06-05 04:13:09,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:09,724 INFO L225 Difference]: With dead ends: 654 [2021-06-05 04:13:09,724 INFO L226 Difference]: Without dead ends: 654 [2021-06-05 04:13:09,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:09,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-05 04:13:09,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 521. [2021-06-05 04:13:09,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 3.098076923076923) internal successors, (1611), 520 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1611 transitions. [2021-06-05 04:13:09,729 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1611 transitions. Word has length 19 [2021-06-05 04:13:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:09,729 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1611 transitions. [2021-06-05 04:13:09,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:13:09,729 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1611 transitions. [2021-06-05 04:13:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:09,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:09,730 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:09,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10271,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:09,930 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:09,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:09,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1324410662, now seen corresponding path program 159 times [2021-06-05 04:13:09,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:09,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94482087] [2021-06-05 04:13:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:09,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:09,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94482087] [2021-06-05 04:13:09,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94482087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:09,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277826188] [2021-06-05 04:13:09,973 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 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 04:13:09,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:13:09,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:09,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:09,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:10,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277826188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:10,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:10,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:10,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905085367] [2021-06-05 04:13:10,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:10,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:10,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:10,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:10,022 INFO L87 Difference]: Start difference. First operand 521 states and 1611 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:10,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:10,134 INFO L93 Difference]: Finished difference Result 678 states and 1970 transitions. [2021-06-05 04:13:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:13:10,134 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-06-05 04:13:10,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:10,135 INFO L225 Difference]: With dead ends: 678 [2021-06-05 04:13:10,135 INFO L226 Difference]: Without dead ends: 670 [2021-06-05 04:13:10,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:13:10,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-06-05 04:13:10,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 544. [2021-06-05 04:13:10,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.1270718232044197) internal successors, (1698), 543 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1698 transitions. [2021-06-05 04:13:10,141 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1698 transitions. Word has length 19 [2021-06-05 04:13:10,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:10,141 INFO L482 AbstractCegarLoop]: Abstraction has 544 states and 1698 transitions. [2021-06-05 04:13:10,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:10,141 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1698 transitions. [2021-06-05 04:13:10,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:10,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:10,142 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:10,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10272,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:10,342 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:10,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:10,342 INFO L82 PathProgramCache]: Analyzing trace with hash 443592135, now seen corresponding path program 160 times [2021-06-05 04:13:10,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:10,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370413188] [2021-06-05 04:13:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:10,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:10,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370413188] [2021-06-05 04:13:10,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370413188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:10,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401274783] [2021-06-05 04:13:10,382 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 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 04:13:10,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:10,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:10,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:10,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:10,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401274783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:10,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:10,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:10,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819496138] [2021-06-05 04:13:10,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:10,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:10,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:10,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:10,435 INFO L87 Difference]: Start difference. First operand 544 states and 1698 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:10,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:10,562 INFO L93 Difference]: Finished difference Result 717 states and 1973 transitions. [2021-06-05 04:13:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:13:10,562 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-06-05 04:13:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:10,563 INFO L225 Difference]: With dead ends: 717 [2021-06-05 04:13:10,563 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 04:13:10,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:13:10,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 04:13:10,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 548. [2021-06-05 04:13:10,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.126142595978062) internal successors, (1710), 547 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1710 transitions. [2021-06-05 04:13:10,568 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1710 transitions. Word has length 19 [2021-06-05 04:13:10,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:10,568 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1710 transitions. [2021-06-05 04:13:10,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:10,569 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1710 transitions. [2021-06-05 04:13:10,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:10,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:10,569 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:10,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10273,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:10,784 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:10,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:10,784 INFO L82 PathProgramCache]: Analyzing trace with hash 881511522, now seen corresponding path program 161 times [2021-06-05 04:13:10,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:10,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124811365] [2021-06-05 04:13:10,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:10,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:10,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124811365] [2021-06-05 04:13:10,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124811365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:10,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117354447] [2021-06-05 04:13:10,828 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 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 04:13:10,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:13:10,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:10,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:10,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:10,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117354447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:10,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:10,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:10,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252547401] [2021-06-05 04:13:10,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:10,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:10,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:10,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:10,903 INFO L87 Difference]: Start difference. First operand 548 states and 1710 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:11,016 INFO L93 Difference]: Finished difference Result 704 states and 2024 transitions. [2021-06-05 04:13:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:13:11,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-06-05 04:13:11,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:11,018 INFO L225 Difference]: With dead ends: 704 [2021-06-05 04:13:11,018 INFO L226 Difference]: Without dead ends: 694 [2021-06-05 04:13:11,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:13:11,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-06-05 04:13:11,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 548. [2021-06-05 04:13:11,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.1243144424131626) internal successors, (1709), 547 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1709 transitions. [2021-06-05 04:13:11,024 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1709 transitions. Word has length 19 [2021-06-05 04:13:11,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:11,024 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1709 transitions. [2021-06-05 04:13:11,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1709 transitions. [2021-06-05 04:13:11,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:11,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:11,024 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:11,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10274,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:11,225 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:11,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:11,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1926727073, now seen corresponding path program 162 times [2021-06-05 04:13:11,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:11,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194063639] [2021-06-05 04:13:11,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:11,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:11,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194063639] [2021-06-05 04:13:11,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194063639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:11,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541073685] [2021-06-05 04:13:11,266 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 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 04:13:11,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:13:11,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:11,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:11,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:11,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541073685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:11,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:11,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:11,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468329172] [2021-06-05 04:13:11,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:11,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:11,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:11,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:11,324 INFO L87 Difference]: Start difference. First operand 548 states and 1709 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:11,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:11,497 INFO L93 Difference]: Finished difference Result 763 states and 2067 transitions. [2021-06-05 04:13:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:13:11,497 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-06-05 04:13:11,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:11,498 INFO L225 Difference]: With dead ends: 763 [2021-06-05 04:13:11,498 INFO L226 Difference]: Without dead ends: 763 [2021-06-05 04:13:11,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:13:11,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-06-05 04:13:11,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 531. [2021-06-05 04:13:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.1245283018867926) internal successors, (1656), 530 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1656 transitions. [2021-06-05 04:13:11,504 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1656 transitions. Word has length 19 [2021-06-05 04:13:11,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:11,504 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1656 transitions. [2021-06-05 04:13:11,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:11,504 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1656 transitions. [2021-06-05 04:13:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:11,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:11,504 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:11,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10275 [2021-06-05 04:13:11,705 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:11,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:11,705 INFO L82 PathProgramCache]: Analyzing trace with hash 36540070, now seen corresponding path program 163 times [2021-06-05 04:13:11,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:11,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320701918] [2021-06-05 04:13:11,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:11,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:11,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320701918] [2021-06-05 04:13:11,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320701918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:11,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880814628] [2021-06-05 04:13:11,752 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 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 04:13:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:11,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:11,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:11,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880814628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:11,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:11,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:11,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119351094] [2021-06-05 04:13:11,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:11,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:11,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:11,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:11,807 INFO L87 Difference]: Start difference. First operand 531 states and 1656 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:11,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:11,863 INFO L93 Difference]: Finished difference Result 610 states and 1818 transitions. [2021-06-05 04:13:11,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:13:11,863 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-06-05 04:13:11,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:11,864 INFO L225 Difference]: With dead ends: 610 [2021-06-05 04:13:11,864 INFO L226 Difference]: Without dead ends: 598 [2021-06-05 04:13:11,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:11,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-05 04:13:11,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 531. [2021-06-05 04:13:11,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.1226415094339623) internal successors, (1655), 530 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:11,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1655 transitions. [2021-06-05 04:13:11,869 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1655 transitions. Word has length 19 [2021-06-05 04:13:11,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:11,869 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1655 transitions. [2021-06-05 04:13:11,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:11,869 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1655 transitions. [2021-06-05 04:13:11,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:11,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:11,870 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:12,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10276 [2021-06-05 04:13:12,070 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:12,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:12,070 INFO L82 PathProgramCache]: Analyzing trace with hash 659269895, now seen corresponding path program 164 times [2021-06-05 04:13:12,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:12,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767151226] [2021-06-05 04:13:12,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:12,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:12,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767151226] [2021-06-05 04:13:12,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767151226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:12,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45798384] [2021-06-05 04:13:12,116 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 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 04:13:12,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:12,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:12,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:12,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:12,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45798384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:12,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:12,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:12,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494885995] [2021-06-05 04:13:12,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:12,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:12,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:12,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:12,173 INFO L87 Difference]: Start difference. First operand 531 states and 1655 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:12,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:12,369 INFO L93 Difference]: Finished difference Result 855 states and 2351 transitions. [2021-06-05 04:13:12,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:13:12,370 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-06-05 04:13:12,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:12,370 INFO L225 Difference]: With dead ends: 855 [2021-06-05 04:13:12,370 INFO L226 Difference]: Without dead ends: 855 [2021-06-05 04:13:12,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:13:12,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-06-05 04:13:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 577. [2021-06-05 04:13:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.1180555555555554) internal successors, (1796), 576 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1796 transitions. [2021-06-05 04:13:12,376 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1796 transitions. Word has length 19 [2021-06-05 04:13:12,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:12,376 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1796 transitions. [2021-06-05 04:13:12,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1796 transitions. [2021-06-05 04:13:12,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:12,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:12,377 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:12,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10277 [2021-06-05 04:13:12,578 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:12,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:12,578 INFO L82 PathProgramCache]: Analyzing trace with hash 24056922, now seen corresponding path program 165 times [2021-06-05 04:13:12,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:12,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748966058] [2021-06-05 04:13:12,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:12,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:12,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748966058] [2021-06-05 04:13:12,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748966058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:12,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106013660] [2021-06-05 04:13:12,620 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 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 04:13:12,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:13:12,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:12,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:12,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:12,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106013660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:12,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:12,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:13:12,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411586440] [2021-06-05 04:13:12,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:13:12,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:12,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:13:12,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:13:12,674 INFO L87 Difference]: Start difference. First operand 577 states and 1796 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:13:12,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:12,736 INFO L93 Difference]: Finished difference Result 817 states and 2337 transitions. [2021-06-05 04:13:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:13:12,737 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 19 [2021-06-05 04:13:12,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:12,737 INFO L225 Difference]: With dead ends: 817 [2021-06-05 04:13:12,737 INFO L226 Difference]: Without dead ends: 817 [2021-06-05 04:13:12,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:12,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-06-05 04:13:12,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 632. [2021-06-05 04:13:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.172741679873217) internal successors, (2002), 631 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:12,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2002 transitions. [2021-06-05 04:13:12,745 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2002 transitions. Word has length 19 [2021-06-05 04:13:12,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:12,745 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2002 transitions. [2021-06-05 04:13:12,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:13:12,745 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2002 transitions. [2021-06-05 04:13:12,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:12,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:12,745 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:12,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10278 [2021-06-05 04:13:12,961 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:12,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:12,961 INFO L82 PathProgramCache]: Analyzing trace with hash -753092677, now seen corresponding path program 166 times [2021-06-05 04:13:12,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:12,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445314940] [2021-06-05 04:13:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:12,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:12,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445314940] [2021-06-05 04:13:12,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445314940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:12,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263080296] [2021-06-05 04:13:12,996 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 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 04:13:13,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:13,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:13,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:13,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:13,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263080296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:13,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:13,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:13:13,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326832710] [2021-06-05 04:13:13,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:13:13,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:13,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:13:13,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:13:13,044 INFO L87 Difference]: Start difference. First operand 632 states and 2002 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:13:13,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:13,153 INFO L93 Difference]: Finished difference Result 820 states and 2329 transitions. [2021-06-05 04:13:13,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:13:13,154 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 19 [2021-06-05 04:13:13,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:13,155 INFO L225 Difference]: With dead ends: 820 [2021-06-05 04:13:13,155 INFO L226 Difference]: Without dead ends: 818 [2021-06-05 04:13:13,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:13:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-06-05 04:13:13,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 649. [2021-06-05 04:13:13,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 3.1882716049382718) internal successors, (2066), 648 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:13,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 2066 transitions. [2021-06-05 04:13:13,161 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 2066 transitions. Word has length 19 [2021-06-05 04:13:13,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:13,161 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 2066 transitions. [2021-06-05 04:13:13,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:13:13,162 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 2066 transitions. [2021-06-05 04:13:13,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:13,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:13,162 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:13,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10279,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:13,363 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:13,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:13,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1701422536, now seen corresponding path program 167 times [2021-06-05 04:13:13,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:13,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029299058] [2021-06-05 04:13:13,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:13,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:13,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029299058] [2021-06-05 04:13:13,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029299058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:13,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705229711] [2021-06-05 04:13:13,404 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 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 04:13:13,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:13:13,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:13,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:13,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:13,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705229711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:13,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:13,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:13:13,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229491283] [2021-06-05 04:13:13,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:13:13,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:13,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:13:13,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:13:13,455 INFO L87 Difference]: Start difference. First operand 649 states and 2066 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:13:13,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:13,559 INFO L93 Difference]: Finished difference Result 822 states and 2381 transitions. [2021-06-05 04:13:13,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:13:13,560 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 19 [2021-06-05 04:13:13,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:13,561 INFO L225 Difference]: With dead ends: 822 [2021-06-05 04:13:13,561 INFO L226 Difference]: Without dead ends: 820 [2021-06-05 04:13:13,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:13:13,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-06-05 04:13:13,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 629. [2021-06-05 04:13:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.1640127388535033) internal successors, (1987), 628 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:13,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1987 transitions. [2021-06-05 04:13:13,568 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1987 transitions. Word has length 19 [2021-06-05 04:13:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:13,568 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 1987 transitions. [2021-06-05 04:13:13,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:13:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1987 transitions. [2021-06-05 04:13:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:13,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:13,569 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:13,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10280,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:13,785 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:13,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:13,785 INFO L82 PathProgramCache]: Analyzing trace with hash 957520631, now seen corresponding path program 168 times [2021-06-05 04:13:13,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:13,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372807394] [2021-06-05 04:13:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:13,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:13,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372807394] [2021-06-05 04:13:13,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372807394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:13,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415661734] [2021-06-05 04:13:13,819 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 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 04:13:13,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:13:13,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:13,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:13,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:13,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415661734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:13,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:13,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:13:13,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088981576] [2021-06-05 04:13:13,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:13:13,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:13,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:13:13,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:13:13,871 INFO L87 Difference]: Start difference. First operand 629 states and 1987 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:13:13,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:13,931 INFO L93 Difference]: Finished difference Result 797 states and 2254 transitions. [2021-06-05 04:13:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:13:13,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 19 [2021-06-05 04:13:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:13,932 INFO L225 Difference]: With dead ends: 797 [2021-06-05 04:13:13,932 INFO L226 Difference]: Without dead ends: 797 [2021-06-05 04:13:13,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:13:13,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-06-05 04:13:13,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 610. [2021-06-05 04:13:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.147783251231527) internal successors, (1917), 609 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1917 transitions. [2021-06-05 04:13:13,939 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1917 transitions. Word has length 19 [2021-06-05 04:13:13,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:13,939 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1917 transitions. [2021-06-05 04:13:13,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:13:13,939 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1917 transitions. [2021-06-05 04:13:13,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:13,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:13,940 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:14,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10281,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:14,140 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:14,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:14,140 INFO L82 PathProgramCache]: Analyzing trace with hash -212017540, now seen corresponding path program 169 times [2021-06-05 04:13:14,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:14,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224666334] [2021-06-05 04:13:14,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:14,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:14,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224666334] [2021-06-05 04:13:14,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224666334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:14,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046356560] [2021-06-05 04:13:14,176 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:14,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:14,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:14,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046356560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:14,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:14,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:13:14,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680770906] [2021-06-05 04:13:14,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:13:14,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:14,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:13:14,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:13:14,223 INFO L87 Difference]: Start difference. First operand 610 states and 1917 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:13:14,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:14,318 INFO L93 Difference]: Finished difference Result 795 states and 2316 transitions. [2021-06-05 04:13:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:13:14,318 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 19 [2021-06-05 04:13:14,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:14,319 INFO L225 Difference]: With dead ends: 795 [2021-06-05 04:13:14,319 INFO L226 Difference]: Without dead ends: 791 [2021-06-05 04:13:14,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:13:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-06-05 04:13:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 610. [2021-06-05 04:13:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.1461412151067325) internal successors, (1916), 609 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1916 transitions. [2021-06-05 04:13:14,326 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1916 transitions. Word has length 19 [2021-06-05 04:13:14,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:14,326 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1916 transitions. [2021-06-05 04:13:14,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:13:14,326 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1916 transitions. [2021-06-05 04:13:14,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:14,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:14,327 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:14,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10282,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:14,527 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:14,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1103339171, now seen corresponding path program 170 times [2021-06-05 04:13:14,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:14,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135017612] [2021-06-05 04:13:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:14,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:14,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135017612] [2021-06-05 04:13:14,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135017612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:14,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448495850] [2021-06-05 04:13:14,564 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 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 04:13:14,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:14,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:14,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:14,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:14,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448495850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:14,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:14,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:13:14,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519125569] [2021-06-05 04:13:14,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:13:14,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:14,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:13:14,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:13:14,616 INFO L87 Difference]: Start difference. First operand 610 states and 1916 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 04:13:14,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:14,678 INFO L93 Difference]: Finished difference Result 759 states and 2167 transitions. [2021-06-05 04:13:14,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:13:14,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 19 [2021-06-05 04:13:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:14,680 INFO L225 Difference]: With dead ends: 759 [2021-06-05 04:13:14,680 INFO L226 Difference]: Without dead ends: 759 [2021-06-05 04:13:14,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:13:14,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-06-05 04:13:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 557. [2021-06-05 04:13:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.134892086330935) internal successors, (1743), 556 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1743 transitions. [2021-06-05 04:13:14,686 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1743 transitions. Word has length 19 [2021-06-05 04:13:14,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:14,686 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 1743 transitions. [2021-06-05 04:13:14,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 04:13:14,686 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1743 transitions. [2021-06-05 04:13:14,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:14,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:14,687 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:14,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10283,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:14,887 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:14,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:14,888 INFO L82 PathProgramCache]: Analyzing trace with hash -191011332, now seen corresponding path program 171 times [2021-06-05 04:13:14,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:14,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986868136] [2021-06-05 04:13:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:14,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:14,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986868136] [2021-06-05 04:13:14,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986868136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:14,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105697538] [2021-06-05 04:13:14,930 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 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 04:13:14,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:13:14,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:14,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:14,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:14,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105697538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:14,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:14,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:14,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491937131] [2021-06-05 04:13:14,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:14,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:14,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:14,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:14,979 INFO L87 Difference]: Start difference. First operand 557 states and 1743 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:15,087 INFO L93 Difference]: Finished difference Result 713 states and 2090 transitions. [2021-06-05 04:13:15,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:13:15,088 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-06-05 04:13:15,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:15,089 INFO L225 Difference]: With dead ends: 713 [2021-06-05 04:13:15,089 INFO L226 Difference]: Without dead ends: 705 [2021-06-05 04:13:15,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:13:15,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-06-05 04:13:15,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 580. [2021-06-05 04:13:15,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 3.153713298791019) internal successors, (1826), 579 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1826 transitions. [2021-06-05 04:13:15,095 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1826 transitions. Word has length 19 [2021-06-05 04:13:15,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:15,095 INFO L482 AbstractCegarLoop]: Abstraction has 580 states and 1826 transitions. [2021-06-05 04:13:15,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1826 transitions. [2021-06-05 04:13:15,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:15,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:15,096 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:15,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10284 [2021-06-05 04:13:15,301 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:15,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:15,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1071829859, now seen corresponding path program 172 times [2021-06-05 04:13:15,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:15,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832909767] [2021-06-05 04:13:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:15,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:15,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832909767] [2021-06-05 04:13:15,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832909767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:15,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574272286] [2021-06-05 04:13:15,341 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 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 04:13:15,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:15,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:15,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:15,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:15,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574272286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:15,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:15,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:15,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340278509] [2021-06-05 04:13:15,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:15,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:15,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:15,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:15,392 INFO L87 Difference]: Start difference. First operand 580 states and 1826 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:15,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:15,480 INFO L93 Difference]: Finished difference Result 748 states and 2153 transitions. [2021-06-05 04:13:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:13:15,480 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 19 [2021-06-05 04:13:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:15,481 INFO L225 Difference]: With dead ends: 748 [2021-06-05 04:13:15,481 INFO L226 Difference]: Without dead ends: 748 [2021-06-05 04:13:15,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:13:15,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-05 04:13:15,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 605. [2021-06-05 04:13:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.1506622516556293) internal successors, (1903), 604 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:15,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1903 transitions. [2021-06-05 04:13:15,487 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1903 transitions. Word has length 19 [2021-06-05 04:13:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:15,487 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1903 transitions. [2021-06-05 04:13:15,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:13:15,488 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1903 transitions. [2021-06-05 04:13:15,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:15,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:15,488 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:15,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10285,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:15,689 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:15,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:15,689 INFO L82 PathProgramCache]: Analyzing trace with hash -633910472, now seen corresponding path program 173 times [2021-06-05 04:13:15,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:15,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097913723] [2021-06-05 04:13:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:15,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:15,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097913723] [2021-06-05 04:13:15,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097913723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:15,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124347025] [2021-06-05 04:13:15,732 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 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 04:13:15,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:13:15,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:15,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:15,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:15,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124347025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:15,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:15,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:15,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676763462] [2021-06-05 04:13:15,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:15,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:15,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:15,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:15,786 INFO L87 Difference]: Start difference. First operand 605 states and 1903 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:15,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:15,907 INFO L93 Difference]: Finished difference Result 772 states and 2234 transitions. [2021-06-05 04:13:15,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:13:15,907 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-06-05 04:13:15,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:15,908 INFO L225 Difference]: With dead ends: 772 [2021-06-05 04:13:15,908 INFO L226 Difference]: Without dead ends: 762 [2021-06-05 04:13:15,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:13:15,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-05 04:13:15,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 605. [2021-06-05 04:13:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.1490066225165565) internal successors, (1902), 604 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:15,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1902 transitions. [2021-06-05 04:13:15,915 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1902 transitions. Word has length 19 [2021-06-05 04:13:15,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:15,915 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1902 transitions. [2021-06-05 04:13:15,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1902 transitions. [2021-06-05 04:13:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:15,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:15,916 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:16,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10286 [2021-06-05 04:13:16,125 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:16,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:16,125 INFO L82 PathProgramCache]: Analyzing trace with hash 411305079, now seen corresponding path program 174 times [2021-06-05 04:13:16,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:16,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572350985] [2021-06-05 04:13:16,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:16,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:16,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572350985] [2021-06-05 04:13:16,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572350985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:16,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350570101] [2021-06-05 04:13:16,167 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 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 04:13:16,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:13:16,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:16,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:16,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:16,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350570101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:16,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:16,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:16,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586070698] [2021-06-05 04:13:16,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:16,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:16,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:16,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:16,226 INFO L87 Difference]: Start difference. First operand 605 states and 1902 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:16,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:16,373 INFO L93 Difference]: Finished difference Result 764 states and 2153 transitions. [2021-06-05 04:13:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:13:16,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-06-05 04:13:16,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:16,374 INFO L225 Difference]: With dead ends: 764 [2021-06-05 04:13:16,374 INFO L226 Difference]: Without dead ends: 764 [2021-06-05 04:13:16,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:13:16,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-06-05 04:13:16,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 593. [2021-06-05 04:13:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.152027027027027) internal successors, (1866), 592 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1866 transitions. [2021-06-05 04:13:16,381 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1866 transitions. Word has length 19 [2021-06-05 04:13:16,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:16,381 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1866 transitions. [2021-06-05 04:13:16,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:16,381 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1866 transitions. [2021-06-05 04:13:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:16,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:16,382 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:16,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10287 [2021-06-05 04:13:16,583 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:16,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:16,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1478881924, now seen corresponding path program 175 times [2021-06-05 04:13:16,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:16,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266928858] [2021-06-05 04:13:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:16,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:16,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266928858] [2021-06-05 04:13:16,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266928858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:16,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884137774] [2021-06-05 04:13:16,645 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 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 04:13:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:16,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:16,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:16,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884137774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:16,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:16,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:16,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001469703] [2021-06-05 04:13:16,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:16,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:16,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:16,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:16,700 INFO L87 Difference]: Start difference. First operand 593 states and 1866 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:16,765 INFO L93 Difference]: Finished difference Result 677 states and 2039 transitions. [2021-06-05 04:13:16,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:13:16,765 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-06-05 04:13:16,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:16,766 INFO L225 Difference]: With dead ends: 677 [2021-06-05 04:13:16,766 INFO L226 Difference]: Without dead ends: 665 [2021-06-05 04:13:16,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:13:16,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-05 04:13:16,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 593. [2021-06-05 04:13:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1503378378378377) internal successors, (1865), 592 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:16,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1865 transitions. [2021-06-05 04:13:16,773 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1865 transitions. Word has length 19 [2021-06-05 04:13:16,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:16,773 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1865 transitions. [2021-06-05 04:13:16,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:16,773 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1865 transitions. [2021-06-05 04:13:16,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:16,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:16,774 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:16,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10288 [2021-06-05 04:13:16,990 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:16,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:16,990 INFO L82 PathProgramCache]: Analyzing trace with hash -856152099, now seen corresponding path program 176 times [2021-06-05 04:13:16,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:16,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176365907] [2021-06-05 04:13:16,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:17,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:17,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176365907] [2021-06-05 04:13:17,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176365907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:17,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598260669] [2021-06-05 04:13:17,063 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 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 04:13:17,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:17,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:17,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:17,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:17,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598260669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:17,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:17,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:17,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340940628] [2021-06-05 04:13:17,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:17,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:17,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:17,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:17,122 INFO L87 Difference]: Start difference. First operand 593 states and 1865 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:17,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:17,301 INFO L93 Difference]: Finished difference Result 742 states and 2108 transitions. [2021-06-05 04:13:17,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:13:17,302 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-06-05 04:13:17,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:17,302 INFO L225 Difference]: With dead ends: 742 [2021-06-05 04:13:17,302 INFO L226 Difference]: Without dead ends: 742 [2021-06-05 04:13:17,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:13:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-05 04:13:17,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 587. [2021-06-05 04:13:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.151877133105802) internal successors, (1847), 586 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1847 transitions. [2021-06-05 04:13:17,308 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1847 transitions. Word has length 19 [2021-06-05 04:13:17,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:17,308 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1847 transitions. [2021-06-05 04:13:17,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:17,309 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1847 transitions. [2021-06-05 04:13:17,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:17,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:17,309 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:17,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10289 [2021-06-05 04:13:17,510 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:17,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:17,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1903193160, now seen corresponding path program 177 times [2021-06-05 04:13:17,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:17,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972830796] [2021-06-05 04:13:17,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:17,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:17,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972830796] [2021-06-05 04:13:17,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972830796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:17,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419590543] [2021-06-05 04:13:17,559 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 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 04:13:17,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:13:17,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:17,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:17,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:17,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419590543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:17,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:17,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:17,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204874967] [2021-06-05 04:13:17,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:17,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:17,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:17,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:17,617 INFO L87 Difference]: Start difference. First operand 587 states and 1847 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:17,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:17,669 INFO L93 Difference]: Finished difference Result 671 states and 2020 transitions. [2021-06-05 04:13:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:13:17,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-06-05 04:13:17,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:17,670 INFO L225 Difference]: With dead ends: 671 [2021-06-05 04:13:17,670 INFO L226 Difference]: Without dead ends: 657 [2021-06-05 04:13:17,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:17,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-06-05 04:13:17,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 587. [2021-06-05 04:13:17,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.150170648464164) internal successors, (1846), 586 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:17,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1846 transitions. [2021-06-05 04:13:17,676 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1846 transitions. Word has length 19 [2021-06-05 04:13:17,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:17,676 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1846 transitions. [2021-06-05 04:13:17,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:17,676 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1846 transitions. [2021-06-05 04:13:17,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:17,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:17,677 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:17,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10290,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:17,877 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:17,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:17,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1492618953, now seen corresponding path program 178 times [2021-06-05 04:13:17,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:17,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237174475] [2021-06-05 04:13:17,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:17,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:17,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237174475] [2021-06-05 04:13:17,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237174475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:17,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887272078] [2021-06-05 04:13:17,924 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 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 04:13:17,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:17,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:17,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:17,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:17,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887272078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:17,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:17,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:17,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780340880] [2021-06-05 04:13:17,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:17,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:17,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:17,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:17,982 INFO L87 Difference]: Start difference. First operand 587 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:18,153 INFO L93 Difference]: Finished difference Result 828 states and 2326 transitions. [2021-06-05 04:13:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:13:18,154 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 19 [2021-06-05 04:13:18,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:18,154 INFO L225 Difference]: With dead ends: 828 [2021-06-05 04:13:18,155 INFO L226 Difference]: Without dead ends: 828 [2021-06-05 04:13:18,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:13:18,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-05 04:13:18,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 591. [2021-06-05 04:13:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1491525423728812) internal successors, (1858), 590 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:18,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1858 transitions. [2021-06-05 04:13:18,161 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1858 transitions. Word has length 19 [2021-06-05 04:13:18,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:18,161 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1858 transitions. [2021-06-05 04:13:18,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 04:13:18,161 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1858 transitions. [2021-06-05 04:13:18,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:18,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:18,161 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:18,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10291,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:18,362 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:18,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:18,362 INFO L82 PathProgramCache]: Analyzing trace with hash 290615364, now seen corresponding path program 179 times [2021-06-05 04:13:18,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:18,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424506085] [2021-06-05 04:13:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:18,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:18,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:18,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424506085] [2021-06-05 04:13:18,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424506085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:18,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115182899] [2021-06-05 04:13:18,415 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 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 04:13:18,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:13:18,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:18,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:18,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:18,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115182899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:18,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:18,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:18,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682682054] [2021-06-05 04:13:18,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:18,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:18,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:18,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:18,478 INFO L87 Difference]: Start difference. First operand 591 states and 1858 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:18,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:18,537 INFO L93 Difference]: Finished difference Result 869 states and 2474 transitions. [2021-06-05 04:13:18,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:13:18,537 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-06-05 04:13:18,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:18,538 INFO L225 Difference]: With dead ends: 869 [2021-06-05 04:13:18,538 INFO L226 Difference]: Without dead ends: 869 [2021-06-05 04:13:18,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-06-05 04:13:18,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 667. [2021-06-05 04:13:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.205705705705706) internal successors, (2135), 666 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2135 transitions. [2021-06-05 04:13:18,545 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2135 transitions. Word has length 19 [2021-06-05 04:13:18,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:18,545 INFO L482 AbstractCegarLoop]: Abstraction has 667 states and 2135 transitions. [2021-06-05 04:13:18,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:18,546 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2135 transitions. [2021-06-05 04:13:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:18,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:18,546 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:18,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10292 [2021-06-05 04:13:18,747 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:18,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:18,747 INFO L82 PathProgramCache]: Analyzing trace with hash -486534235, now seen corresponding path program 180 times [2021-06-05 04:13:18,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:18,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202526819] [2021-06-05 04:13:18,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:18,796 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:18,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:18,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202526819] [2021-06-05 04:13:18,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202526819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:18,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547222797] [2021-06-05 04:13:18,796 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 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 04:13:18,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:13:18,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:18,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:18,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:18,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547222797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:18,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:18,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:18,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536640387] [2021-06-05 04:13:18,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:18,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:18,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:18,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:18,845 INFO L87 Difference]: Start difference. First operand 667 states and 2135 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:18,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:18,973 INFO L93 Difference]: Finished difference Result 878 states and 2501 transitions. [2021-06-05 04:13:18,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:13:18,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-06-05 04:13:18,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:18,974 INFO L225 Difference]: With dead ends: 878 [2021-06-05 04:13:18,974 INFO L226 Difference]: Without dead ends: 876 [2021-06-05 04:13:18,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:13:18,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-06-05 04:13:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 684. [2021-06-05 04:13:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 3.2225475841874083) internal successors, (2201), 683 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2201 transitions. [2021-06-05 04:13:18,982 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2201 transitions. Word has length 19 [2021-06-05 04:13:18,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:18,982 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 2201 transitions. [2021-06-05 04:13:18,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:18,982 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2201 transitions. [2021-06-05 04:13:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:18,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:18,983 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:19,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10293,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:19,183 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:19,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:19,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1434864094, now seen corresponding path program 181 times [2021-06-05 04:13:19,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:19,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535643462] [2021-06-05 04:13:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:19,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:19,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535643462] [2021-06-05 04:13:19,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535643462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:19,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318470960] [2021-06-05 04:13:19,228 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 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 04:13:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:19,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:19,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:19,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318470960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:19,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:19,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:19,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946567390] [2021-06-05 04:13:19,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:19,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:19,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:19,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:19,276 INFO L87 Difference]: Start difference. First operand 684 states and 2201 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:19,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:19,391 INFO L93 Difference]: Finished difference Result 876 states and 2523 transitions. [2021-06-05 04:13:19,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:13:19,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-06-05 04:13:19,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:19,392 INFO L225 Difference]: With dead ends: 876 [2021-06-05 04:13:19,392 INFO L226 Difference]: Without dead ends: 874 [2021-06-05 04:13:19,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:13:19,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-06-05 04:13:19,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 669. [2021-06-05 04:13:19,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.2050898203592815) internal successors, (2141), 668 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:19,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2141 transitions. [2021-06-05 04:13:19,399 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2141 transitions. Word has length 19 [2021-06-05 04:13:19,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:19,399 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 2141 transitions. [2021-06-05 04:13:19,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2141 transitions. [2021-06-05 04:13:19,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:19,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:19,400 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:19,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10294,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:19,601 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:19,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1224079073, now seen corresponding path program 182 times [2021-06-05 04:13:19,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:19,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987473146] [2021-06-05 04:13:19,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:19,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:19,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987473146] [2021-06-05 04:13:19,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987473146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:19,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2691712] [2021-06-05 04:13:19,651 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 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 04:13:19,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:19,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:19,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:19,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:19,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2691712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:19,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:19,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:19,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42424291] [2021-06-05 04:13:19,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:19,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:19,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:19,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:19,703 INFO L87 Difference]: Start difference. First operand 669 states and 2141 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:19,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:19,772 INFO L93 Difference]: Finished difference Result 868 states and 2462 transitions. [2021-06-05 04:13:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:13:19,773 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-06-05 04:13:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:19,774 INFO L225 Difference]: With dead ends: 868 [2021-06-05 04:13:19,774 INFO L226 Difference]: Without dead ends: 868 [2021-06-05 04:13:19,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:19,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-06-05 04:13:19,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 674. [2021-06-05 04:13:19,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.2005943536404162) internal successors, (2154), 673 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:19,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2154 transitions. [2021-06-05 04:13:19,781 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2154 transitions. Word has length 19 [2021-06-05 04:13:19,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:19,781 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2154 transitions. [2021-06-05 04:13:19,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:19,781 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2154 transitions. [2021-06-05 04:13:19,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:19,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:19,782 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:19,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10295,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:19,982 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:19,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:19,982 INFO L82 PathProgramCache]: Analyzing trace with hash 54540902, now seen corresponding path program 183 times [2021-06-05 04:13:19,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:19,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278232249] [2021-06-05 04:13:19,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:20,024 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:20,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:20,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278232249] [2021-06-05 04:13:20,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278232249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:20,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175134636] [2021-06-05 04:13:20,024 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 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 04:13:20,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:13:20,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:20,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:20,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:20,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175134636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:20,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:20,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:20,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822135999] [2021-06-05 04:13:20,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:20,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:20,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:20,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:20,073 INFO L87 Difference]: Start difference. First operand 674 states and 2154 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:20,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:20,180 INFO L93 Difference]: Finished difference Result 905 states and 2624 transitions. [2021-06-05 04:13:20,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:13:20,180 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-06-05 04:13:20,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:20,181 INFO L225 Difference]: With dead ends: 905 [2021-06-05 04:13:20,181 INFO L226 Difference]: Without dead ends: 901 [2021-06-05 04:13:20,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:13:20,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-06-05 04:13:20,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 674. [2021-06-05 04:13:20,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.199108469539376) internal successors, (2153), 673 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:20,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2153 transitions. [2021-06-05 04:13:20,189 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2153 transitions. Word has length 19 [2021-06-05 04:13:20,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:20,190 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2153 transitions. [2021-06-05 04:13:20,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:20,190 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2153 transitions. [2021-06-05 04:13:20,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:20,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:20,190 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:20,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10296 [2021-06-05 04:13:20,391 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:20,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:20,391 INFO L82 PathProgramCache]: Analyzing trace with hash -836780729, now seen corresponding path program 184 times [2021-06-05 04:13:20,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:20,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749638205] [2021-06-05 04:13:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:20,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:20,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749638205] [2021-06-05 04:13:20,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749638205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:20,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571487305] [2021-06-05 04:13:20,454 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 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 04:13:20,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:20,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:20,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:20,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:20,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571487305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:20,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:20,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:20,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82401893] [2021-06-05 04:13:20,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:20,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:20,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:20,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:20,508 INFO L87 Difference]: Start difference. First operand 674 states and 2153 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:20,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:20,590 INFO L93 Difference]: Finished difference Result 858 states and 2461 transitions. [2021-06-05 04:13:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:13:20,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-06-05 04:13:20,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:20,591 INFO L225 Difference]: With dead ends: 858 [2021-06-05 04:13:20,592 INFO L226 Difference]: Without dead ends: 858 [2021-06-05 04:13:20,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:13:20,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-06-05 04:13:20,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 687. [2021-06-05 04:13:20,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.2011661807580176) internal successors, (2196), 686 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:20,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2196 transitions. [2021-06-05 04:13:20,599 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2196 transitions. Word has length 19 [2021-06-05 04:13:20,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:20,599 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 2196 transitions. [2021-06-05 04:13:20,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:20,599 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2196 transitions. [2021-06-05 04:13:20,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:20,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:20,600 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:20,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10297 [2021-06-05 04:13:20,802 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:20,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:20,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1018544478, now seen corresponding path program 185 times [2021-06-05 04:13:20,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:20,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057964018] [2021-06-05 04:13:20,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:20,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:20,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057964018] [2021-06-05 04:13:20,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057964018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:20,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667945752] [2021-06-05 04:13:20,842 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 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 04:13:20,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:13:20,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:20,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:20,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:20,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667945752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:20,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:20,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:20,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164817975] [2021-06-05 04:13:20,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:20,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:20,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:20,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:20,891 INFO L87 Difference]: Start difference. First operand 687 states and 2196 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:21,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:21,004 INFO L93 Difference]: Finished difference Result 936 states and 2753 transitions. [2021-06-05 04:13:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:13:21,005 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-06-05 04:13:21,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:21,006 INFO L225 Difference]: With dead ends: 936 [2021-06-05 04:13:21,006 INFO L226 Difference]: Without dead ends: 930 [2021-06-05 04:13:21,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:13:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-06-05 04:13:21,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 695. [2021-06-05 04:13:21,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.2031700288184437) internal successors, (2223), 694 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:21,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2223 transitions. [2021-06-05 04:13:21,013 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2223 transitions. Word has length 19 [2021-06-05 04:13:21,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:21,013 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 2223 transitions. [2021-06-05 04:13:21,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:21,014 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2223 transitions. [2021-06-05 04:13:21,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:21,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:21,014 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:21,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10298,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:21,229 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:21,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:21,229 INFO L82 PathProgramCache]: Analyzing trace with hash -298925151, now seen corresponding path program 186 times [2021-06-05 04:13:21,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:21,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752897343] [2021-06-05 04:13:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:21,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:21,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752897343] [2021-06-05 04:13:21,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752897343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:21,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162244205] [2021-06-05 04:13:21,284 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 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 04:13:21,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:13:21,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:21,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:21,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:21,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162244205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:21,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:21,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:21,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575006936] [2021-06-05 04:13:21,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:21,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:21,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:21,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:21,363 INFO L87 Difference]: Start difference. First operand 695 states and 2223 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:21,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:21,456 INFO L93 Difference]: Finished difference Result 835 states and 2456 transitions. [2021-06-05 04:13:21,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:13:21,456 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-06-05 04:13:21,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:21,457 INFO L225 Difference]: With dead ends: 835 [2021-06-05 04:13:21,457 INFO L226 Difference]: Without dead ends: 835 [2021-06-05 04:13:21,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:13:21,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-06-05 04:13:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 707. [2021-06-05 04:13:21,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.2011331444759206) internal successors, (2260), 706 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2260 transitions. [2021-06-05 04:13:21,465 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2260 transitions. Word has length 19 [2021-06-05 04:13:21,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:21,465 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2260 transitions. [2021-06-05 04:13:21,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:21,465 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2260 transitions. [2021-06-05 04:13:21,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:21,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:21,466 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:21,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10299 [2021-06-05 04:13:21,677 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:21,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:21,677 INFO L82 PathProgramCache]: Analyzing trace with hash 75547110, now seen corresponding path program 187 times [2021-06-05 04:13:21,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:21,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297554635] [2021-06-05 04:13:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:21,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:21,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297554635] [2021-06-05 04:13:21,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297554635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:21,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505128810] [2021-06-05 04:13:21,717 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 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 04:13:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:21,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:21,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:21,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505128810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:21,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:21,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:21,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913335513] [2021-06-05 04:13:21,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:21,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:21,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:21,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:21,766 INFO L87 Difference]: Start difference. First operand 707 states and 2260 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:21,871 INFO L93 Difference]: Finished difference Result 914 states and 2697 transitions. [2021-06-05 04:13:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:13:21,872 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-06-05 04:13:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:21,873 INFO L225 Difference]: With dead ends: 914 [2021-06-05 04:13:21,873 INFO L226 Difference]: Without dead ends: 906 [2021-06-05 04:13:21,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:13:21,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-06-05 04:13:21,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 707. [2021-06-05 04:13:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.198300283286119) internal successors, (2258), 706 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2258 transitions. [2021-06-05 04:13:21,881 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2258 transitions. Word has length 19 [2021-06-05 04:13:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:21,881 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2258 transitions. [2021-06-05 04:13:21,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:21,881 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2258 transitions. [2021-06-05 04:13:21,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:21,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:21,882 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:22,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10300 [2021-06-05 04:13:22,082 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:22,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:22,083 INFO L82 PathProgramCache]: Analyzing trace with hash -805271417, now seen corresponding path program 188 times [2021-06-05 04:13:22,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:22,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365427241] [2021-06-05 04:13:22,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:22,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:22,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365427241] [2021-06-05 04:13:22,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365427241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:22,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985150043] [2021-06-05 04:13:22,129 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 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 04:13:22,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:22,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:22,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:22,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:22,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985150043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:22,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:22,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:13:22,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824326564] [2021-06-05 04:13:22,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:13:22,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:22,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:13:22,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:13:22,181 INFO L87 Difference]: Start difference. First operand 707 states and 2258 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:22,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:22,250 INFO L93 Difference]: Finished difference Result 812 states and 2469 transitions. [2021-06-05 04:13:22,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:13:22,251 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 19 [2021-06-05 04:13:22,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:22,251 INFO L225 Difference]: With dead ends: 812 [2021-06-05 04:13:22,251 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 04:13:22,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:22,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 04:13:22,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 737. [2021-06-05 04:13:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.1956521739130435) internal successors, (2352), 736 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2352 transitions. [2021-06-05 04:13:22,258 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2352 transitions. Word has length 19 [2021-06-05 04:13:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:22,259 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2352 transitions. [2021-06-05 04:13:22,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 04:13:22,259 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2352 transitions. [2021-06-05 04:13:22,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:22,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:22,259 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:22,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10301 [2021-06-05 04:13:22,460 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:22,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:22,460 INFO L82 PathProgramCache]: Analyzing trace with hash -367352030, now seen corresponding path program 189 times [2021-06-05 04:13:22,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:22,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487640523] [2021-06-05 04:13:22,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:22,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:22,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487640523] [2021-06-05 04:13:22,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487640523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:22,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223848659] [2021-06-05 04:13:22,501 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 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 04:13:22,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:13:22,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:22,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:22,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:22,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223848659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:22,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:22,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:22,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096476904] [2021-06-05 04:13:22,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:22,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:22,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:22,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:22,559 INFO L87 Difference]: Start difference. First operand 737 states and 2352 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:13:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:22,680 INFO L93 Difference]: Finished difference Result 930 states and 2762 transitions. [2021-06-05 04:13:22,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:13:22,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-06-05 04:13:22,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:22,682 INFO L225 Difference]: With dead ends: 930 [2021-06-05 04:13:22,682 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 04:13:22,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:13:22,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 04:13:22,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 766. [2021-06-05 04:13:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.197385620915033) internal successors, (2446), 765 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:22,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2446 transitions. [2021-06-05 04:13:22,691 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2446 transitions. Word has length 19 [2021-06-05 04:13:22,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:22,691 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 2446 transitions. [2021-06-05 04:13:22,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:13:22,691 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2446 transitions. [2021-06-05 04:13:22,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:22,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:22,692 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:22,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10302,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:22,892 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:22,892 INFO L82 PathProgramCache]: Analyzing trace with hash 677863521, now seen corresponding path program 190 times [2021-06-05 04:13:22,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:22,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607819768] [2021-06-05 04:13:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:22,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:22,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607819768] [2021-06-05 04:13:22,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607819768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:22,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847974524] [2021-06-05 04:13:22,940 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 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 04:13:22,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:22,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:22,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:22,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:22,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847974524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:22,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:22,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:22,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854241170] [2021-06-05 04:13:22,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:22,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:22,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:22,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:22,999 INFO L87 Difference]: Start difference. First operand 766 states and 2446 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:13:23,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:23,116 INFO L93 Difference]: Finished difference Result 870 states and 2608 transitions. [2021-06-05 04:13:23,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:13:23,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-06-05 04:13:23,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:23,118 INFO L225 Difference]: With dead ends: 870 [2021-06-05 04:13:23,118 INFO L226 Difference]: Without dead ends: 870 [2021-06-05 04:13:23,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:13:23,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-06-05 04:13:23,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 762. [2021-06-05 04:13:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.1984231274638635) internal successors, (2434), 761 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2434 transitions. [2021-06-05 04:13:23,125 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2434 transitions. Word has length 19 [2021-06-05 04:13:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:23,125 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2434 transitions. [2021-06-05 04:13:23,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:13:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2434 transitions. [2021-06-05 04:13:23,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:23,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:23,126 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:23,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10303 [2021-06-05 04:13:23,327 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:23,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:23,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1212323482, now seen corresponding path program 191 times [2021-06-05 04:13:23,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:23,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943127076] [2021-06-05 04:13:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:23,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:23,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943127076] [2021-06-05 04:13:23,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943127076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:23,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905852837] [2021-06-05 04:13:23,369 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 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 04:13:23,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:13:23,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:23,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:23,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:23,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905852837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:23,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:23,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:23,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511615320] [2021-06-05 04:13:23,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:23,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:23,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:23,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:23,453 INFO L87 Difference]: Start difference. First operand 762 states and 2434 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:13:23,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:23,524 INFO L93 Difference]: Finished difference Result 853 states and 2620 transitions. [2021-06-05 04:13:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:13:23,524 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-06-05 04:13:23,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:23,525 INFO L225 Difference]: With dead ends: 853 [2021-06-05 04:13:23,525 INFO L226 Difference]: Without dead ends: 841 [2021-06-05 04:13:23,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:13:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-06-05 04:13:23,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 762. [2021-06-05 04:13:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.1971090670170828) internal successors, (2433), 761 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2433 transitions. [2021-06-05 04:13:23,532 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2433 transitions. Word has length 19 [2021-06-05 04:13:23,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:23,532 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2433 transitions. [2021-06-05 04:13:23,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:13:23,533 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2433 transitions. [2021-06-05 04:13:23,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:23,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:23,533 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:23,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10304,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:23,734 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:23,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:23,734 INFO L82 PathProgramCache]: Analyzing trace with hash -589593657, now seen corresponding path program 192 times [2021-06-05 04:13:23,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:23,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489771918] [2021-06-05 04:13:23,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:23,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:23,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489771918] [2021-06-05 04:13:23,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489771918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:23,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076783216] [2021-06-05 04:13:23,783 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 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 04:13:23,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:13:23,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:23,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:23,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:23,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076783216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:23,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:23,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:23,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553107643] [2021-06-05 04:13:23,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:23,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:23,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:23,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:23,851 INFO L87 Difference]: Start difference. First operand 762 states and 2433 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:13:24,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:24,001 INFO L93 Difference]: Finished difference Result 875 states and 2625 transitions. [2021-06-05 04:13:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:13:24,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-06-05 04:13:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:24,002 INFO L225 Difference]: With dead ends: 875 [2021-06-05 04:13:24,002 INFO L226 Difference]: Without dead ends: 875 [2021-06-05 04:13:24,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:13:24,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-06-05 04:13:24,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 759. [2021-06-05 04:13:24,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1978891820580473) internal successors, (2424), 758 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2424 transitions. [2021-06-05 04:13:24,010 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2424 transitions. Word has length 19 [2021-06-05 04:13:24,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:24,010 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2424 transitions. [2021-06-05 04:13:24,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:13:24,011 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2424 transitions. [2021-06-05 04:13:24,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:24,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:24,011 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:24,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10305,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:24,212 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:24,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:24,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1636634718, now seen corresponding path program 193 times [2021-06-05 04:13:24,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:24,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618017639] [2021-06-05 04:13:24,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:24,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:24,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618017639] [2021-06-05 04:13:24,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618017639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:24,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420903262] [2021-06-05 04:13:24,257 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 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 04:13:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:24,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:24,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:24,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420903262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:24,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:24,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:24,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382523857] [2021-06-05 04:13:24,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:24,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:24,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:24,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:24,311 INFO L87 Difference]: Start difference. First operand 759 states and 2424 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:13:24,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:24,366 INFO L93 Difference]: Finished difference Result 848 states and 2607 transitions. [2021-06-05 04:13:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:13:24,366 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-06-05 04:13:24,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:24,367 INFO L225 Difference]: With dead ends: 848 [2021-06-05 04:13:24,367 INFO L226 Difference]: Without dead ends: 834 [2021-06-05 04:13:24,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-06-05 04:13:24,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 759. [2021-06-05 04:13:24,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1965699208443272) internal successors, (2423), 758 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2423 transitions. [2021-06-05 04:13:24,374 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2423 transitions. Word has length 19 [2021-06-05 04:13:24,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:24,374 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2423 transitions. [2021-06-05 04:13:24,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:13:24,374 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2423 transitions. [2021-06-05 04:13:24,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:24,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:24,375 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:24,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10306 [2021-06-05 04:13:24,576 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:24,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:24,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1226060511, now seen corresponding path program 194 times [2021-06-05 04:13:24,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:24,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409712584] [2021-06-05 04:13:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:24,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:24,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409712584] [2021-06-05 04:13:24,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409712584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:24,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706315575] [2021-06-05 04:13:24,627 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 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 04:13:24,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:24,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:24,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:24,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:24,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706315575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:24,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:24,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:24,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113203315] [2021-06-05 04:13:24,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:24,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:24,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:24,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:24,684 INFO L87 Difference]: Start difference. First operand 759 states and 2423 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:13:24,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:24,833 INFO L93 Difference]: Finished difference Result 921 states and 2738 transitions. [2021-06-05 04:13:24,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:13:24,833 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-06-05 04:13:24,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:24,834 INFO L225 Difference]: With dead ends: 921 [2021-06-05 04:13:24,834 INFO L226 Difference]: Without dead ends: 921 [2021-06-05 04:13:24,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:13:24,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-06-05 04:13:24,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 759. [2021-06-05 04:13:24,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1965699208443272) internal successors, (2423), 758 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:24,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2423 transitions. [2021-06-05 04:13:24,842 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2423 transitions. Word has length 19 [2021-06-05 04:13:24,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:24,842 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2423 transitions. [2021-06-05 04:13:24,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:13:24,842 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2423 transitions. [2021-06-05 04:13:24,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:24,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:24,843 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:25,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10307,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:25,043 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:25,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:25,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1905381146, now seen corresponding path program 195 times [2021-06-05 04:13:25,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:25,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211673884] [2021-06-05 04:13:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:25,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:25,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211673884] [2021-06-05 04:13:25,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211673884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:25,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154919946] [2021-06-05 04:13:25,091 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 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 04:13:25,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:13:25,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:25,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:25,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:25,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154919946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:25,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:25,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:25,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567303644] [2021-06-05 04:13:25,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:25,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:25,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:25,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:25,151 INFO L87 Difference]: Start difference. First operand 759 states and 2423 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:13:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:25,207 INFO L93 Difference]: Finished difference Result 846 states and 2603 transitions. [2021-06-05 04:13:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:13:25,207 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-06-05 04:13:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:25,208 INFO L225 Difference]: With dead ends: 846 [2021-06-05 04:13:25,208 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 04:13:25,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:13:25,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 04:13:25,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 757. [2021-06-05 04:13:25,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.1997354497354498) internal successors, (2419), 756 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2419 transitions. [2021-06-05 04:13:25,215 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2419 transitions. Word has length 19 [2021-06-05 04:13:25,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:25,215 INFO L482 AbstractCegarLoop]: Abstraction has 757 states and 2419 transitions. [2021-06-05 04:13:25,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:13:25,216 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2419 transitions. [2021-06-05 04:13:25,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:13:25,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:25,216 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:25,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10308 [2021-06-05 04:13:25,421 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:25,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:25,421 INFO L82 PathProgramCache]: Analyzing trace with hash 518303495, now seen corresponding path program 196 times [2021-06-05 04:13:25,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:25,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284286854] [2021-06-05 04:13:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:25,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:25,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284286854] [2021-06-05 04:13:25,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284286854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:25,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371138656] [2021-06-05 04:13:25,472 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 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 04:13:25,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:25,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:25,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:13:25,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:25,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371138656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:25,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:25,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:13:25,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56152643] [2021-06-05 04:13:25,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:13:25,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:25,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:13:25,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:13:25,527 INFO L87 Difference]: Start difference. First operand 757 states and 2419 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:13:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:25,682 INFO L93 Difference]: Finished difference Result 1025 states and 3016 transitions. [2021-06-05 04:13:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:13:25,683 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-06-05 04:13:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:25,684 INFO L225 Difference]: With dead ends: 1025 [2021-06-05 04:13:25,684 INFO L226 Difference]: Without dead ends: 1025 [2021-06-05 04:13:25,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:13:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-06-05 04:13:25,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 769. [2021-06-05 04:13:25,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.1927083333333335) internal successors, (2452), 768 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:25,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2452 transitions. [2021-06-05 04:13:25,692 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2452 transitions. Word has length 19 [2021-06-05 04:13:25,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:25,693 INFO L482 AbstractCegarLoop]: Abstraction has 769 states and 2452 transitions. [2021-06-05 04:13:25,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:13:25,693 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2452 transitions. [2021-06-05 04:13:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:13:25,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:25,694 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:25,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10309,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:25,901 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:25,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1714157417, now seen corresponding path program 197 times [2021-06-05 04:13:25,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:25,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130140713] [2021-06-05 04:13:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:26,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:26,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130140713] [2021-06-05 04:13:26,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130140713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:26,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207532868] [2021-06-05 04:13:26,012 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 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 04:13:26,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:13:26,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:26,038 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:13:26,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:26,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:26,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:13:27,015 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 262 [2021-06-05 04:13:27,978 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 245 [2021-06-05 04:13:28,134 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 332 [2021-06-05 04:13:28,356 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 394 [2021-06-05 04:13:28,638 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 384 [2021-06-05 04:13:28,928 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 384 [2021-06-05 04:13:29,244 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 389 [2021-06-05 04:13:29,494 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 359 [2021-06-05 04:13:29,634 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 251 [2021-06-05 04:13:30,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:30,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:30,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:13:30,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:13:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:30,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207532868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:30,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:30,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 04:13:30,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053941268] [2021-06-05 04:13:30,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:13:30,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:30,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:13:30,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:13:30,190 INFO L87 Difference]: Start difference. First operand 769 states and 2452 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 04:13:30,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:30,567 INFO L93 Difference]: Finished difference Result 853 states and 2629 transitions. [2021-06-05 04:13:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:13:30,567 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 04:13:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:30,568 INFO L225 Difference]: With dead ends: 853 [2021-06-05 04:13:30,568 INFO L226 Difference]: Without dead ends: 826 [2021-06-05 04:13:30,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 383.5ms TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:13:30,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-05 04:13:30,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 787. [2021-06-05 04:13:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.1895674300254453) internal successors, (2507), 786 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:30,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2507 transitions. [2021-06-05 04:13:30,577 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2507 transitions. Word has length 20 [2021-06-05 04:13:30,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:30,577 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2507 transitions. [2021-06-05 04:13:30,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 04:13:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2507 transitions. [2021-06-05 04:13:30,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:13:30,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:30,578 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:30,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10310 [2021-06-05 04:13:30,789 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:30,789 INFO L82 PathProgramCache]: Analyzing trace with hash -122454295, now seen corresponding path program 198 times [2021-06-05 04:13:30,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:30,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72383373] [2021-06-05 04:13:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:30,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:30,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72383373] [2021-06-05 04:13:30,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72383373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:30,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828558618] [2021-06-05 04:13:30,886 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 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 04:13:30,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:13:30,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:30,911 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:13:30,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:31,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:31,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:13:31,987 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 353 [2021-06-05 04:13:33,363 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 349 [2021-06-05 04:13:33,559 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 349 [2021-06-05 04:13:33,842 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 591 DAG size of output: 356 [2021-06-05 04:13:34,042 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 338 [2021-06-05 04:13:34,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:34,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:34,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:13:34,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:13:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:34,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828558618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:34,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:34,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 04:13:34,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473723759] [2021-06-05 04:13:34,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:13:34,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:34,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:13:34,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:13:34,844 INFO L87 Difference]: Start difference. First operand 787 states and 2507 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:13:35,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:35,253 INFO L93 Difference]: Finished difference Result 877 states and 2701 transitions. [2021-06-05 04:13:35,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:13:35,254 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:13:35,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:35,255 INFO L225 Difference]: With dead ends: 877 [2021-06-05 04:13:35,255 INFO L226 Difference]: Without dead ends: 861 [2021-06-05 04:13:35,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 325.6ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:13:35,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-06-05 04:13:35,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 806. [2021-06-05 04:13:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1962732919254657) internal successors, (2573), 805 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2573 transitions. [2021-06-05 04:13:35,264 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2573 transitions. Word has length 20 [2021-06-05 04:13:35,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:35,264 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2573 transitions. [2021-06-05 04:13:35,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:13:35,264 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2573 transitions. [2021-06-05 04:13:35,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:13:35,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:35,265 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:35,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10608,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:35,465 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:35,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:35,466 INFO L82 PathProgramCache]: Analyzing trace with hash 736420235, now seen corresponding path program 199 times [2021-06-05 04:13:35,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:35,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212080886] [2021-06-05 04:13:35,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:35,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:35,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212080886] [2021-06-05 04:13:35,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212080886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:35,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850645650] [2021-06-05 04:13:35,570 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 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 04:13:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:35,593 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:13:35,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:36,260 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 2028 DAG size of output: 48 [2021-06-05 04:13:36,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:36,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:13:36,853 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 188 [2021-06-05 04:13:37,424 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 197 [2021-06-05 04:13:37,611 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 237 [2021-06-05 04:13:37,801 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 308 [2021-06-05 04:13:37,987 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 308 [2021-06-05 04:13:38,199 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 313 [2021-06-05 04:13:38,351 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 274 [2021-06-05 04:13:39,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:39,464 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 04:13:39,464 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 04:13:39,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 04:13:40,528 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 241 [2021-06-05 04:13:40,688 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 264 [2021-06-05 04:13:41,431 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 354 [2021-06-05 04:13:41,741 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 354 [2021-06-05 04:13:42,106 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 364 [2021-06-05 04:13:42,285 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 245 [2021-06-05 04:13:42,428 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 248 [2021-06-05 04:13:43,160 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 214 [2021-06-05 04:13:43,283 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 225 [2021-06-05 04:13:43,439 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-06-05 04:13:43,596 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-06-05 04:13:43,769 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 240 [2021-06-05 04:13:43,943 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 248 [2021-06-05 04:13:44,819 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 176 [2021-06-05 04:13:45,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:13:45,734 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 04:13:45,734 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 04:13:45,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 04:13:46,333 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 263 [2021-06-05 04:13:46,437 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 253 [2021-06-05 04:13:47,369 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 267 [2021-06-05 04:13:47,530 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 283 [2021-06-05 04:13:47,704 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 296 [2021-06-05 04:13:48,898 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 314 [2021-06-05 04:13:49,094 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 339 [2021-06-05 04:13:49,510 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 777 DAG size of output: 513 [2021-06-05 04:13:50,020 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 531 [2021-06-05 04:13:50,534 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 531 [2021-06-05 04:13:51,159 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 873 DAG size of output: 543 [2021-06-05 04:13:51,597 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 456 [2021-06-05 04:13:52,003 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 292 [2021-06-05 04:13:52,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 04:13:52,959 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 04:13:52,960 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 04:13:52,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 04:13:54,768 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 239 [2021-06-05 04:13:54,920 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 239 [2021-06-05 04:13:55,112 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 253 [2021-06-05 04:13:55,881 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 04:13:55,899 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 04:13:55,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:13:55,899 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 04:13:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:55,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850645650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:55,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:55,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 04:13:55,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783187461] [2021-06-05 04:13:55,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:13:55,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:55,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:13:55,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:13:55,926 INFO L87 Difference]: Start difference. First operand 806 states and 2573 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:13:56,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:56,258 INFO L93 Difference]: Finished difference Result 901 states and 2754 transitions. [2021-06-05 04:13:56,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:13:56,259 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:13:56,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:56,260 INFO L225 Difference]: With dead ends: 901 [2021-06-05 04:13:56,260 INFO L226 Difference]: Without dead ends: 891 [2021-06-05 04:13:56,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 338.0ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:13:56,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-06-05 04:13:56,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 806. [2021-06-05 04:13:56,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1962732919254657) internal successors, (2573), 805 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:56,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2573 transitions. [2021-06-05 04:13:56,268 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2573 transitions. Word has length 20 [2021-06-05 04:13:56,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:56,268 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2573 transitions. [2021-06-05 04:13:56,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:13:56,268 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2573 transitions. [2021-06-05 04:13:56,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:13:56,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:56,269 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:56,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11011,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:56,470 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:56,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:56,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1564059463, now seen corresponding path program 200 times [2021-06-05 04:13:56,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:56,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657108378] [2021-06-05 04:13:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:56,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:56,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657108378] [2021-06-05 04:13:56,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657108378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:56,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032189173] [2021-06-05 04:13:56,569 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 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 04:13:56,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:56,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:56,593 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:13:56,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:56,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:56,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:13:58,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:58,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:58,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:13:58,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:13:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:58,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032189173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:58,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:58,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 04:13:58,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915707753] [2021-06-05 04:13:58,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:13:58,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:58,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:13:58,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:13:58,367 INFO L87 Difference]: Start difference. First operand 806 states and 2573 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:13:58,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:58,786 INFO L93 Difference]: Finished difference Result 938 states and 2953 transitions. [2021-06-05 04:13:58,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:13:58,786 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:13:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:58,787 INFO L225 Difference]: With dead ends: 938 [2021-06-05 04:13:58,787 INFO L226 Difference]: Without dead ends: 922 [2021-06-05 04:13:58,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 337.2ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:13:58,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-06-05 04:13:58,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 871. [2021-06-05 04:13:58,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.2367816091954023) internal successors, (2816), 870 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:58,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2816 transitions. [2021-06-05 04:13:58,797 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2816 transitions. Word has length 20 [2021-06-05 04:13:58,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:58,797 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2816 transitions. [2021-06-05 04:13:58,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:13:58,797 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2816 transitions. [2021-06-05 04:13:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:13:58,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:58,798 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:58,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12560,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:58,998 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:58,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:58,998 INFO L82 PathProgramCache]: Analyzing trace with hash -705184933, now seen corresponding path program 201 times [2021-06-05 04:13:58,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:58,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606541305] [2021-06-05 04:13:58,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:59,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:59,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606541305] [2021-06-05 04:13:59,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606541305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:59,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715420236] [2021-06-05 04:13:59,094 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 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 04:13:59,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:13:59,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:59,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:13:59,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:59,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:59,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:14:00,033 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 251 [2021-06-05 04:14:00,135 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 251 [2021-06-05 04:14:00,256 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 262 [2021-06-05 04:14:00,548 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 358 [2021-06-05 04:14:00,782 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 318 [2021-06-05 04:14:01,065 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 183 [2021-06-05 04:14:01,939 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 202 [2021-06-05 04:14:02,069 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 213 [2021-06-05 04:14:02,216 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 158 [2021-06-05 04:14:02,820 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 261 [2021-06-05 04:14:03,045 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 261 [2021-06-05 04:14:03,305 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 268 [2021-06-05 04:14:03,434 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 231 [2021-06-05 04:14:03,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:14:04,415 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 04:14:04,415 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 04:14:04,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 04:14:06,049 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 212 [2021-06-05 04:14:06,256 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 224 [2021-06-05 04:14:06,528 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 239 [2021-06-05 04:14:07,516 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 221 [2021-06-05 04:14:07,699 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 231 [2021-06-05 04:14:07,966 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 252 [2021-06-05 04:14:08,244 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 262 [2021-06-05 04:14:08,802 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 329 [2021-06-05 04:14:09,464 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 348 [2021-06-05 04:14:10,550 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 185 [2021-06-05 04:14:10,733 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 234 [2021-06-05 04:14:10,945 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 249 [2021-06-05 04:14:11,199 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 259 [2021-06-05 04:14:11,491 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 272 [2021-06-05 04:14:12,211 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 206 [2021-06-05 04:14:12,333 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 214 [2021-06-05 04:14:12,489 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 241 [2021-06-05 04:14:12,670 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 251 [2021-06-05 04:14:12,907 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 294 [2021-06-05 04:14:13,482 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 622 DAG size of output: 359 [2021-06-05 04:14:14,190 WARN L205 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 398 [2021-06-05 04:14:14,959 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 399 [2021-06-05 04:14:16,542 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 965 DAG size of output: 559 [2021-06-05 04:14:18,349 WARN L205 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 1033 DAG size of output: 607 [2021-06-05 04:14:20,170 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 1033 DAG size of output: 607 [2021-06-05 04:14:22,080 WARN L205 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 1039 DAG size of output: 578 [2021-06-05 04:14:23,385 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 580 DAG size of output: 594 [2021-06-05 04:14:24,609 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 573 DAG size of output: 578 [2021-06-05 04:14:25,993 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 567 DAG size of output: 601 [2021-06-05 04:14:27,412 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 562 DAG size of output: 494 [2021-06-05 04:14:27,530 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 443 [2021-06-05 04:14:27,729 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 409 [2021-06-05 04:14:28,656 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 210 [2021-06-05 04:14:28,782 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 216 [2021-06-05 04:14:28,942 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 235 [2021-06-05 04:14:29,108 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 265 [2021-06-05 04:14:29,344 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 299 [2021-06-05 04:14:29,745 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 359 [2021-06-05 04:14:30,227 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 550 DAG size of output: 376 [2021-06-05 04:14:30,824 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 422 [2021-06-05 04:14:31,422 WARN L205 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 422 [2021-06-05 04:14:32,117 WARN L205 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 426 [2021-06-05 04:14:33,162 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 428 DAG size of output: 651 [2021-06-05 04:14:33,840 WARN L205 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 343 [2021-06-05 04:14:34,643 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 351 [2021-06-05 04:14:35,629 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 272 [2021-06-05 04:14:35,816 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 286 [2021-06-05 04:14:36,116 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 392 [2021-06-05 04:14:36,753 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 453 [2021-06-05 04:14:37,461 WARN L205 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 323 [2021-06-05 04:14:38,399 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 259 [2021-06-05 04:14:38,561 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 270 [2021-06-05 04:14:38,743 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 273 [2021-06-05 04:14:39,069 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 313 [2021-06-05 04:14:39,500 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 382 [2021-06-05 04:14:39,925 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 444 [2021-06-05 04:14:40,774 WARN L205 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 1023 DAG size of output: 679 [2021-06-05 04:14:41,612 WARN L205 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 1023 DAG size of output: 679 [2021-06-05 04:14:42,561 WARN L205 SmtUtils]: Spent 941.00 ms on a formula simplification. DAG size of input: 1028 DAG size of output: 677 [2021-06-05 04:14:42,824 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 258 [2021-06-05 04:14:43,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:14:43,750 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 04:14:43,750 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 04:14:43,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 04:14:44,972 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 410 [2021-06-05 04:14:45,154 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 410 [2021-06-05 04:14:45,413 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 416 [2021-06-05 04:14:45,716 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 522 [2021-06-05 04:14:46,117 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 518 [2021-06-05 04:14:46,455 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 479 [2021-06-05 04:14:46,784 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 485 [2021-06-05 04:14:47,037 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 350 [2021-06-05 04:14:47,849 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 347 [2021-06-05 04:14:48,185 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 416 [2021-06-05 04:14:48,382 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 331 [2021-06-05 04:14:49,288 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-06-05 04:14:49,813 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 747 DAG size of output: 576 [2021-06-05 04:14:50,612 WARN L205 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 969 DAG size of output: 660 [2021-06-05 04:14:50,807 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 352 [2021-06-05 04:14:50,966 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 303 [2021-06-05 04:14:51,398 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 279 [2021-06-05 04:14:51,511 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 248 [2021-06-05 04:14:52,131 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 390 [2021-06-05 04:14:52,266 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 249 [2021-06-05 04:14:52,392 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 227 [2021-06-05 04:14:52,781 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 241 [2021-06-05 04:14:53,427 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 334 [2021-06-05 04:14:53,934 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 554 [2021-06-05 04:14:55,017 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 1305 DAG size of output: 734 [2021-06-05 04:14:56,384 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 1481 DAG size of output: 824 [2021-06-05 04:14:57,750 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 1481 DAG size of output: 824 [2021-06-05 04:14:59,413 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 1487 DAG size of output: 829 [2021-06-05 04:15:01,162 WARN L205 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 831 DAG size of output: 1033 [2021-06-05 04:15:02,993 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 779 DAG size of output: 893 [2021-06-05 04:15:03,781 WARN L205 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 459 DAG size of output: 555 [2021-06-05 04:15:04,695 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 258 [2021-06-05 04:15:04,934 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 326 [2021-06-05 04:15:05,778 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 239 [2021-06-05 04:15:06,112 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 579 DAG size of output: 408 [2021-06-05 04:15:06,261 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 573 [2021-06-05 04:15:06,969 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 526 [2021-06-05 04:15:07,096 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 219 [2021-06-05 04:15:07,595 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 251 [2021-06-05 04:15:08,063 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 314 [2021-06-05 04:15:08,178 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 207 [2021-06-05 04:15:08,861 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 411 [2021-06-05 04:15:09,214 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 448 [2021-06-05 04:15:09,928 WARN L205 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 1102 DAG size of output: 720 [2021-06-05 04:15:10,924 WARN L205 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 619 [2021-06-05 04:15:11,490 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 481 [2021-06-05 04:15:11,673 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 242 [2021-06-05 04:15:12,332 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 246 [2021-06-05 04:15:12,941 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 261 [2021-06-05 04:15:13,171 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 295 [2021-06-05 04:15:13,551 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 359 [2021-06-05 04:15:14,607 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 264 [2021-06-05 04:15:14,772 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 269 [2021-06-05 04:15:15,194 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 449 [2021-06-05 04:15:16,465 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 1606 DAG size of output: 905 [2021-06-05 04:15:17,672 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 1606 DAG size of output: 905 [2021-06-05 04:15:19,031 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 1612 DAG size of output: 912 [2021-06-05 04:15:19,906 WARN L205 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 914 DAG size of output: 718 [2021-06-05 04:15:20,015 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 179 [2021-06-05 04:15:20,235 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 242 [2021-06-05 04:15:20,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 04:15:21,031 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 04:15:21,031 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 04:15:21,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 04:15:22,075 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 225 [2021-06-05 04:15:22,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 04:15:22,593 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 04:15:22,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:15:22,594 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 04:15:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:22,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715420236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:22,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:22,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 04:15:22,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115967021] [2021-06-05 04:15:22,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:15:22,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:22,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:15:22,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:15:22,622 INFO L87 Difference]: Start difference. First operand 871 states and 2816 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:15:23,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:23,028 INFO L93 Difference]: Finished difference Result 978 states and 3027 transitions. [2021-06-05 04:15:23,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:15:23,029 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:15:23,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:23,030 INFO L225 Difference]: With dead ends: 978 [2021-06-05 04:15:23,030 INFO L226 Difference]: Without dead ends: 959 [2021-06-05 04:15:23,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 378.1ms TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:15:23,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-06-05 04:15:23,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 869. [2021-06-05 04:15:23,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.224654377880184) internal successors, (2799), 868 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:23,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2799 transitions. [2021-06-05 04:15:23,040 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2799 transitions. Word has length 20 [2021-06-05 04:15:23,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:23,040 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2799 transitions. [2021-06-05 04:15:23,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:15:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2799 transitions. [2021-06-05 04:15:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:23,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:23,041 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:23,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12777,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:23,242 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:23,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1005428375, now seen corresponding path program 202 times [2021-06-05 04:15:23,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:23,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473929345] [2021-06-05 04:15:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:23,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:23,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473929345] [2021-06-05 04:15:23,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473929345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:23,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732485372] [2021-06-05 04:15:23,349 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 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 04:15:23,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:15:23,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:23,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:15:23,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:23,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:23,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:15:24,542 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 249 [2021-06-05 04:15:24,687 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 202 [2021-06-05 04:15:24,998 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 238 [2021-06-05 04:15:25,832 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 221 [2021-06-05 04:15:25,964 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 232 [2021-06-05 04:15:26,094 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 232 [2021-06-05 04:15:26,250 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 237 [2021-06-05 04:15:26,374 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 239 [2021-06-05 04:15:26,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:15:27,165 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 04:15:27,165 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 04:15:27,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 04:15:27,919 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 255 [2021-06-05 04:15:28,091 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 299 [2021-06-05 04:15:29,131 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 315 [2021-06-05 04:15:29,325 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 326 [2021-06-05 04:15:29,526 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 326 [2021-06-05 04:15:29,751 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 337 [2021-06-05 04:15:30,103 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 399 [2021-06-05 04:15:30,464 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 308 [2021-06-05 04:15:30,766 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 310 [2021-06-05 04:15:31,817 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 265 [2021-06-05 04:15:33,315 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 291 [2021-06-05 04:15:33,985 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 434 [2021-06-05 04:15:34,588 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 610 DAG size of output: 577 [2021-06-05 04:15:35,301 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 578 [2021-06-05 04:15:36,172 WARN L205 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 691 DAG size of output: 653 [2021-06-05 04:15:36,349 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 266 [2021-06-05 04:15:37,351 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 228 [2021-06-05 04:15:37,517 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 247 [2021-06-05 04:15:38,489 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 233 [2021-06-05 04:15:38,968 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 301 [2021-06-05 04:15:39,901 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 458 [2021-06-05 04:15:40,520 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 463 [2021-06-05 04:15:41,277 WARN L205 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 569 [2021-06-05 04:15:43,025 WARN L205 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 1194 DAG size of output: 1035 [2021-06-05 04:15:44,773 WARN L205 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 1194 DAG size of output: 1035 [2021-06-05 04:15:46,600 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 1200 DAG size of output: 859 [2021-06-05 04:15:47,936 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 861 DAG size of output: 700 [2021-06-05 04:15:48,892 WARN L205 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 650 DAG size of output: 590 [2021-06-05 04:15:49,437 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 672 [2021-06-05 04:15:50,424 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 215 [2021-06-05 04:15:50,603 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 230 [2021-06-05 04:15:50,779 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 230 [2021-06-05 04:15:50,961 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 234 [2021-06-05 04:15:51,128 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 255 [2021-06-05 04:15:51,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:15:52,176 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 04:15:52,176 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 04:15:52,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 04:15:54,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 04:15:54,601 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 04:15:54,601 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 04:15:54,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 04:15:55,791 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 04:15:55,810 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 04:15:55,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:15:55,810 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 04:15:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:55,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732485372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:55,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:55,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 04:15:55,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399562829] [2021-06-05 04:15:55,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:15:55,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:55,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:15:55,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:15:55,838 INFO L87 Difference]: Start difference. First operand 869 states and 2799 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:15:56,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:56,290 INFO L93 Difference]: Finished difference Result 942 states and 2954 transitions. [2021-06-05 04:15:56,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:15:56,291 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:15:56,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:56,292 INFO L225 Difference]: With dead ends: 942 [2021-06-05 04:15:56,292 INFO L226 Difference]: Without dead ends: 932 [2021-06-05 04:15:56,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 401.2ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:15:56,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-06-05 04:15:56,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 872. [2021-06-05 04:15:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.2238805970149254) internal successors, (2808), 871 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:56,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2808 transitions. [2021-06-05 04:15:56,301 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2808 transitions. Word has length 20 [2021-06-05 04:15:56,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:56,301 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2808 transitions. [2021-06-05 04:15:56,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:15:56,301 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2808 transitions. [2021-06-05 04:15:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:15:56,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:56,302 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:56,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15915 [2021-06-05 04:15:56,503 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:56,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:56,503 INFO L82 PathProgramCache]: Analyzing trace with hash 990820585, now seen corresponding path program 203 times [2021-06-05 04:15:56,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:56,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050976247] [2021-06-05 04:15:56,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:56,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:56,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050976247] [2021-06-05 04:15:56,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050976247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:56,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480855007] [2021-06-05 04:15:56,599 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 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 04:15:56,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:15:56,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:56,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 04:15:56,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:57,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:57,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:15:58,031 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 475 [2021-06-05 04:15:58,245 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 485 [2021-06-05 04:15:58,467 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 485 [2021-06-05 04:15:58,720 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 496 [2021-06-05 04:15:59,035 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 658 [2021-06-05 04:15:59,167 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 446 [2021-06-05 04:16:00,018 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 294 [2021-06-05 04:16:00,166 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 294 [2021-06-05 04:16:00,409 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 318 [2021-06-05 04:16:00,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:16:00,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:00,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:16:00,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:3 [2021-06-05 04:16:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:00,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480855007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:00,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:00,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 04:16:00,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373998485] [2021-06-05 04:16:00,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:16:00,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:00,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:16:00,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:00,856 INFO L87 Difference]: Start difference. First operand 872 states and 2808 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:16:01,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:01,528 INFO L93 Difference]: Finished difference Result 1010 states and 3206 transitions. [2021-06-05 04:16:01,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:16:01,528 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:16:01,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:01,530 INFO L225 Difference]: With dead ends: 1010 [2021-06-05 04:16:01,530 INFO L226 Difference]: Without dead ends: 994 [2021-06-05 04:16:01,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 401.6ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:16:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-06-05 04:16:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 941. [2021-06-05 04:16:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.2542553191489363) internal successors, (3059), 940 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3059 transitions. [2021-06-05 04:16:01,540 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3059 transitions. Word has length 20 [2021-06-05 04:16:01,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:01,540 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 3059 transitions. [2021-06-05 04:16:01,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:16:01,540 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3059 transitions. [2021-06-05 04:16:01,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:01,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:01,541 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:01,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18834,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:01,742 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:01,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:01,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1849695115, now seen corresponding path program 204 times [2021-06-05 04:16:01,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:01,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896021822] [2021-06-05 04:16:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:01,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:01,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896021822] [2021-06-05 04:16:01,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896021822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:01,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349610908] [2021-06-05 04:16:01,842 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 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 04:16:01,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:16:01,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:01,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:16:01,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:02,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:02,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:16:03,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:16:04,115 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 04:16:04,115 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 04:16:04,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 04:16:04,779 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 259 [2021-06-05 04:16:05,457 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 269 [2021-06-05 04:16:06,012 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 375 [2021-06-05 04:16:06,275 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 404 [2021-06-05 04:16:06,543 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 404 [2021-06-05 04:16:06,827 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 394 [2021-06-05 04:16:07,129 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 391 [2021-06-05 04:16:07,285 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 302 [2021-06-05 04:16:07,501 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 266 [2021-06-05 04:16:07,672 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 271 [2021-06-05 04:16:08,315 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 249 [2021-06-05 04:16:08,441 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 259 [2021-06-05 04:16:09,030 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 331 [2021-06-05 04:16:10,044 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 258 [2021-06-05 04:16:10,206 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 280 [2021-06-05 04:16:10,571 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 299 [2021-06-05 04:16:11,008 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 478 [2021-06-05 04:16:11,522 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 504 [2021-06-05 04:16:12,185 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 804 DAG size of output: 581 [2021-06-05 04:16:12,831 WARN L205 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 804 DAG size of output: 581 [2021-06-05 04:16:13,526 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 809 DAG size of output: 559 [2021-06-05 04:16:14,095 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 561 [2021-06-05 04:16:14,202 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 551 DAG size of output: 519 [2021-06-05 04:16:15,175 WARN L205 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 465 [2021-06-05 04:16:15,936 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 355 [2021-06-05 04:16:16,180 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 370 [2021-06-05 04:16:16,485 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 378 [2021-06-05 04:16:16,735 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 378 [2021-06-05 04:16:17,032 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 360 [2021-06-05 04:16:17,527 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 291 [2021-06-05 04:16:18,118 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 229 [2021-06-05 04:16:18,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:16:18,913 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 04:16:18,913 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 04:16:18,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 04:16:21,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 04:16:21,312 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 04:16:21,312 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 04:16:21,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 04:16:22,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 04:16:22,651 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 04:16:22,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:16:22,651 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 04:16:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:22,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349610908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:22,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:22,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 04:16:22,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132524499] [2021-06-05 04:16:22,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:16:22,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:22,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:16:22,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:22,680 INFO L87 Difference]: Start difference. First operand 941 states and 3059 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:16:23,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:23,252 INFO L93 Difference]: Finished difference Result 1081 states and 3355 transitions. [2021-06-05 04:16:23,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:16:23,253 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:16:23,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:23,254 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 04:16:23,254 INFO L226 Difference]: Without dead ends: 1055 [2021-06-05 04:16:23,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 450.6ms TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:16:23,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-06-05 04:16:23,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 947. [2021-06-05 04:16:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.251585623678647) internal successors, (3076), 946 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:23,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3076 transitions. [2021-06-05 04:16:23,264 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3076 transitions. Word has length 20 [2021-06-05 04:16:23,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:23,264 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 3076 transitions. [2021-06-05 04:16:23,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:16:23,264 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3076 transitions. [2021-06-05 04:16:23,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:16:23,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:23,265 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:23,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19308,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:23,466 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:23,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:23,466 INFO L82 PathProgramCache]: Analyzing trace with hash -734658873, now seen corresponding path program 205 times [2021-06-05 04:16:23,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:23,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014052693] [2021-06-05 04:16:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:23,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:23,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014052693] [2021-06-05 04:16:23,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014052693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:23,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64980952] [2021-06-05 04:16:23,564 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 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 04:16:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:23,588 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:16:23,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:23,887 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 1189 DAG size of output: 49 [2021-06-05 04:16:24,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:24,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:16:24,722 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 256 [2021-06-05 04:16:25,598 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 254 [2021-06-05 04:16:25,737 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 254 [2021-06-05 04:16:25,884 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 262 [2021-06-05 04:16:26,027 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 253 [2021-06-05 04:16:26,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:16:26,851 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 04:16:26,851 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 04:16:26,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 04:16:27,965 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 315 [2021-06-05 04:16:28,164 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 331 [2021-06-05 04:16:28,353 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 331 [2021-06-05 04:16:28,590 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 341 [2021-06-05 04:16:29,051 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 439 [2021-06-05 04:16:29,456 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 423 [2021-06-05 04:16:29,686 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 343 [2021-06-05 04:16:29,850 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 295 [2021-06-05 04:16:29,966 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 255 [2021-06-05 04:16:31,473 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 231 [2021-06-05 04:16:31,705 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 291 [2021-06-05 04:16:31,984 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 320 [2021-06-05 04:16:32,367 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 374 [2021-06-05 04:16:32,837 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 417 [2021-06-05 04:16:33,042 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 294 [2021-06-05 04:16:34,142 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 242 [2021-06-05 04:16:34,847 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 220 [2021-06-05 04:16:35,115 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 330 [2021-06-05 04:16:35,487 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 402 [2021-06-05 04:16:35,945 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 432 [2021-06-05 04:16:36,548 WARN L205 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 646 DAG size of output: 497 [2021-06-05 04:16:37,762 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 924 DAG size of output: 729 [2021-06-05 04:16:39,289 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 1058 DAG size of output: 857 [2021-06-05 04:16:39,653 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 348 [2021-06-05 04:16:39,857 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 302 [2021-06-05 04:16:40,040 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 265 [2021-06-05 04:16:40,145 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 228 [2021-06-05 04:16:40,860 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 232 [2021-06-05 04:16:40,992 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 239 [2021-06-05 04:16:41,849 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 298 [2021-06-05 04:16:42,181 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 349 [2021-06-05 04:16:42,411 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 298 [2021-06-05 04:16:42,547 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 248 [2021-06-05 04:16:42,686 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 233 [2021-06-05 04:16:43,635 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 262 [2021-06-05 04:16:44,595 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 226 [2021-06-05 04:16:44,779 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 280 [2021-06-05 04:16:44,987 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 287 [2021-06-05 04:16:45,409 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 406 [2021-06-05 04:16:45,972 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 482 [2021-06-05 04:16:46,982 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 841 DAG size of output: 671 [2021-06-05 04:16:48,309 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 981 DAG size of output: 787 [2021-06-05 04:16:51,597 WARN L205 SmtUtils]: Spent 3.28 s on a formula simplification. DAG size of input: 1718 DAG size of output: 1383 [2021-06-05 04:16:52,102 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 426 [2021-06-05 04:16:52,337 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 351 [2021-06-05 04:16:52,525 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 304 [2021-06-05 04:16:52,653 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 264 [2021-06-05 04:16:53,586 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 222 [2021-06-05 04:16:53,742 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 245 [2021-06-05 04:16:54,582 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 250 [2021-06-05 04:16:54,753 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 257 [2021-06-05 04:16:55,111 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 344 [2021-06-05 04:16:55,575 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 390 [2021-06-05 04:16:55,794 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 300 [2021-06-05 04:16:55,920 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 250 [2021-06-05 04:16:56,793 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 243 [2021-06-05 04:16:56,960 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 262 [2021-06-05 04:16:57,188 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 330 [2021-06-05 04:16:57,295 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 266 [2021-06-05 04:16:57,447 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 262 [2021-06-05 04:16:58,480 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 245 [2021-06-05 04:16:58,702 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 310 [2021-06-05 04:16:59,024 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 389 [2021-06-05 04:16:59,631 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 540 [2021-06-05 04:17:00,419 WARN L205 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 622 [2021-06-05 04:17:01,821 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 1030 DAG size of output: 835 [2021-06-05 04:17:03,618 WARN L205 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 1173 DAG size of output: 953 [2021-06-05 04:17:03,844 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 346 [2021-06-05 04:17:04,017 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 297 [2021-06-05 04:17:04,755 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 256 [2021-06-05 04:17:04,937 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 289 [2021-06-05 04:17:05,642 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 262 [2021-06-05 04:17:06,244 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 329 [2021-06-05 04:17:06,517 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 378 [2021-06-05 04:17:06,931 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 410 [2021-06-05 04:17:07,578 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 656 DAG size of output: 560 [2021-06-05 04:17:08,419 WARN L205 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 595 [2021-06-05 04:17:08,559 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 254 [2021-06-05 04:17:09,429 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 233 [2021-06-05 04:17:10,256 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 319 [2021-06-05 04:17:10,566 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 373 [2021-06-05 04:17:10,958 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 401 [2021-06-05 04:17:11,439 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 439 [2021-06-05 04:17:12,842 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 1076 DAG size of output: 887 [2021-06-05 04:17:14,593 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 1212 DAG size of output: 1004 [2021-06-05 04:17:18,684 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 1979 DAG size of output: 1641 [2021-06-05 04:17:27,106 WARN L205 SmtUtils]: Spent 8.41 s on a formula simplification. DAG size of input: 3193 DAG size of output: 2569 [2021-06-05 04:17:35,552 WARN L205 SmtUtils]: Spent 8.43 s on a formula simplification. DAG size of input: 3193 DAG size of output: 2569 [2021-06-05 04:17:45,586 WARN L205 SmtUtils]: Spent 10.02 s on a formula simplification. DAG size of input: 3202 DAG size of output: 2270 [2021-06-05 04:18:02,888 WARN L205 SmtUtils]: Spent 17.29 s on a formula simplification. DAG size of input: 2272 DAG size of output: 2759 [2021-06-05 04:18:04,477 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 1300 DAG size of output: 1279 [2021-06-05 04:18:07,710 WARN L205 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 829 DAG size of output: 1038 [2021-06-05 04:18:08,810 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 566 DAG size of output: 530 [2021-06-05 04:18:09,136 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 399 [2021-06-05 04:18:09,949 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 252 [2021-06-05 04:18:10,265 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 245 [2021-06-05 04:18:10,390 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 219 [2021-06-05 04:18:11,094 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 213 [2021-06-05 04:18:11,310 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 263 [2021-06-05 04:18:11,568 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 282 [2021-06-05 04:18:12,083 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 350 [2021-06-05 04:18:13,067 WARN L205 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 1044 DAG size of output: 557 [2021-06-05 04:18:13,372 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 521 [2021-06-05 04:18:14,023 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 459 [2021-06-05 04:18:14,401 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 269 [2021-06-05 04:18:14,617 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 303 [2021-06-05 04:18:14,842 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 275 [2021-06-05 04:18:15,162 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 218 [2021-06-05 04:18:15,492 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 397 [2021-06-05 04:18:17,014 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 1554 DAG size of output: 803 [2021-06-05 04:18:22,386 WARN L205 SmtUtils]: Spent 5.37 s on a formula simplification. DAG size of input: 3037 DAG size of output: 1686 [2021-06-05 04:18:27,770 WARN L205 SmtUtils]: Spent 5.37 s on a formula simplification. DAG size of input: 3037 DAG size of output: 1686 [2021-06-05 04:18:33,402 WARN L205 SmtUtils]: Spent 5.62 s on a formula simplification. DAG size of input: 3039 DAG size of output: 1662 [2021-06-05 04:18:33,865 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 1662 DAG size of output: 1662 [2021-06-05 04:18:34,027 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 781 DAG size of output: 781 [2021-06-05 04:18:34,316 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 298 [2021-06-05 04:18:35,795 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 188 [2021-06-05 04:18:35,941 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 207 [2021-06-05 04:18:36,255 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 251 [2021-06-05 04:18:36,573 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 375 [2021-06-05 04:18:37,523 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 263 [2021-06-05 04:18:38,033 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 794 DAG size of output: 508 [2021-06-05 04:18:40,944 WARN L205 SmtUtils]: Spent 2.90 s on a formula simplification. DAG size of input: 986 DAG size of output: 1338 [2021-06-05 04:18:41,485 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 768 DAG size of output: 749 [2021-06-05 04:18:41,895 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 305 [2021-06-05 04:18:42,831 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 211 [2021-06-05 04:18:43,736 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 224 [2021-06-05 04:18:43,875 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 229 [2021-06-05 04:18:44,354 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 484 [2021-06-05 04:18:44,768 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 231 [2021-06-05 04:18:45,101 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 217 [2021-06-05 04:18:45,393 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 489 DAG size of output: 321 [2021-06-05 04:18:45,879 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 709 DAG size of output: 399 [2021-06-05 04:18:46,258 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 686 [2021-06-05 04:18:46,540 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 361 [2021-06-05 04:18:47,469 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 224 [2021-06-05 04:18:47,934 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 403 [2021-06-05 04:18:49,008 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 281 [2021-06-05 04:18:49,143 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 249 [2021-06-05 04:18:49,735 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 347 [2021-06-05 04:18:50,139 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 768 DAG size of output: 415 [2021-06-05 04:18:51,125 WARN L205 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 1350 DAG size of output: 700 [2021-06-05 04:18:52,812 WARN L205 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 2054 DAG size of output: 1054 [2021-06-05 04:18:54,508 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 2054 DAG size of output: 1054 [2021-06-05 04:18:55,702 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 2056 DAG size of output: 695 [2021-06-05 04:18:56,811 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 697 DAG size of output: 852 [2021-06-05 04:18:56,953 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 214 [2021-06-05 04:18:57,718 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 622 DAG size of output: 541 [2021-06-05 04:18:58,089 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 313 [2021-06-05 04:18:58,435 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 380 [2021-06-05 04:18:58,775 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 380 [2021-06-05 04:18:59,172 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 371 [2021-06-05 04:18:59,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:18:59,803 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 04:18:59,803 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 04:18:59,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 04:19:00,564 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 298 [2021-06-05 04:19:00,713 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 312 [2021-06-05 04:19:00,852 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 312 [2021-06-05 04:19:01,012 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 312 [2021-06-05 04:19:01,265 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 396 [2021-06-05 04:19:01,412 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 309 [2021-06-05 04:19:02,589 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 239 [2021-06-05 04:19:02,791 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 308 [2021-06-05 04:19:03,962 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 308 [2021-06-05 04:19:04,871 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 447 [2021-06-05 04:19:05,247 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 721 DAG size of output: 505 [2021-06-05 04:19:05,960 WARN L205 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 1067 DAG size of output: 653 [2021-06-05 04:19:06,078 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 256 [2021-06-05 04:19:06,837 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 238 [2021-06-05 04:19:07,027 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 315 [2021-06-05 04:19:07,276 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 343 [2021-06-05 04:19:07,896 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 245 [2021-06-05 04:19:08,039 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 271 [2021-06-05 04:19:08,482 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 495 [2021-06-05 04:19:09,089 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 250 [2021-06-05 04:19:09,257 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 278 [2021-06-05 04:19:10,007 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 383 [2021-06-05 04:19:10,280 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 406 [2021-06-05 04:19:11,137 WARN L205 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 740 [2021-06-05 04:19:12,465 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 257 [2021-06-05 04:19:12,642 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 302 [2021-06-05 04:19:12,963 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 450 [2021-06-05 04:19:13,364 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 489 [2021-06-05 04:19:14,363 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 322 [2021-06-05 04:19:14,590 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 351 [2021-06-05 04:19:14,828 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 477 DAG size of output: 378 [2021-06-05 04:19:15,596 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 913 DAG size of output: 704 [2021-06-05 04:19:17,466 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 1540 DAG size of output: 1209 [2021-06-05 04:19:20,476 WARN L205 SmtUtils]: Spent 3.00 s on a formula simplification. DAG size of input: 2433 DAG size of output: 1679 [2021-06-05 04:19:23,976 WARN L205 SmtUtils]: Spent 3.49 s on a formula simplification. DAG size of input: 2445 DAG size of output: 1690 [2021-06-05 04:19:27,461 WARN L205 SmtUtils]: Spent 3.48 s on a formula simplification. DAG size of input: 2445 DAG size of output: 1690 [2021-06-05 04:19:31,041 WARN L205 SmtUtils]: Spent 3.57 s on a formula simplification. DAG size of input: 2450 DAG size of output: 1487 [2021-06-05 04:19:36,253 WARN L205 SmtUtils]: Spent 5.20 s on a formula simplification. DAG size of input: 1489 DAG size of output: 1519 [2021-06-05 04:19:36,518 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 1328 DAG size of output: 1328 [2021-06-05 04:19:36,671 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 1317 [2021-06-05 04:19:37,579 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 474 [2021-06-05 04:19:38,513 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 349 [2021-06-05 04:19:38,685 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 366 [2021-06-05 04:19:38,979 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 389 [2021-06-05 04:19:39,275 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 487 [2021-06-05 04:19:39,723 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 1443 DAG size of output: 594 [2021-06-05 04:19:40,282 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 1486 DAG size of output: 610 [2021-06-05 04:19:40,991 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 1700 DAG size of output: 684 [2021-06-05 04:19:41,704 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 1700 DAG size of output: 684 [2021-06-05 04:19:42,559 WARN L205 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 1705 DAG size of output: 683 [2021-06-05 04:19:43,078 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 451 [2021-06-05 04:19:44,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 04:19:44,379 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 04:19:44,380 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 04:19:44,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 04:19:45,060 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 316 [2021-06-05 04:19:45,201 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 329 [2021-06-05 04:19:45,372 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 341 [2021-06-05 04:19:45,554 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 341 [2021-06-05 04:19:45,771 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 331 [2021-06-05 04:19:45,997 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 381 [2021-06-05 04:19:46,244 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 361 [2021-06-05 04:19:46,409 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 306 [2021-06-05 04:19:46,640 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 287 [2021-06-05 04:19:46,992 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 298 [2021-06-05 04:19:47,337 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 351 [2021-06-05 04:19:47,553 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 311 [2021-06-05 04:19:47,921 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 285 [2021-06-05 04:19:48,178 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 285 [2021-06-05 04:19:48,314 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 298 [2021-06-05 04:19:48,529 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 367 [2021-06-05 04:19:48,954 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 688 DAG size of output: 491 [2021-06-05 04:19:49,380 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 692 DAG size of output: 494 [2021-06-05 04:19:49,576 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 269 [2021-06-05 04:19:49,689 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 226 [2021-06-05 04:19:49,822 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 199 [2021-06-05 04:19:50,967 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 292 [2021-06-05 04:19:51,656 WARN L205 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 652 [2021-06-05 04:19:52,349 WARN L205 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 652 [2021-06-05 04:19:53,134 WARN L205 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 985 DAG size of output: 651 [2021-06-05 04:19:53,990 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 653 DAG size of output: 691 [2021-06-05 04:19:55,433 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 234 [2021-06-05 04:19:55,778 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 321 [2021-06-05 04:19:56,509 WARN L205 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 621 [2021-06-05 04:19:57,344 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 211 [2021-06-05 04:19:57,783 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 284 [2021-06-05 04:19:58,018 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 289 [2021-06-05 04:19:58,778 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 708 DAG size of output: 396 [2021-06-05 04:19:59,227 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 1027 DAG size of output: 466 [2021-06-05 04:19:59,678 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 1027 DAG size of output: 466 [2021-06-05 04:20:00,262 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 1031 DAG size of output: 465 [2021-06-05 04:20:00,408 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 278 [2021-06-05 04:20:00,540 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 285 [2021-06-05 04:20:00,828 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 04:20:00,846 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 04:20:00,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:20:00,846 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 04:20:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:00,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64980952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:00,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:00,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 04:20:00,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338978906] [2021-06-05 04:20:00,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:20:00,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:00,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:20:00,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:20:00,874 INFO L87 Difference]: Start difference. First operand 947 states and 3076 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:20:01,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:01,352 INFO L93 Difference]: Finished difference Result 1018 states and 3228 transitions. [2021-06-05 04:20:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:20:01,352 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:20:01,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:01,353 INFO L225 Difference]: With dead ends: 1018 [2021-06-05 04:20:01,354 INFO L226 Difference]: Without dead ends: 1008 [2021-06-05 04:20:01,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 434.6ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:20:01,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-06-05 04:20:01,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 951. [2021-06-05 04:20:01,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.2505263157894735) internal successors, (3088), 950 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3088 transitions. [2021-06-05 04:20:01,363 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3088 transitions. Word has length 20 [2021-06-05 04:20:01,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:01,363 INFO L482 AbstractCegarLoop]: Abstraction has 951 states and 3088 transitions. [2021-06-05 04:20:01,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:20:01,363 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3088 transitions. [2021-06-05 04:20:01,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:20:01,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:01,364 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:01,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20681 [2021-06-05 04:20:01,566 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:01,566 INFO L82 PathProgramCache]: Analyzing trace with hash 754746123, now seen corresponding path program 206 times [2021-06-05 04:20:01,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:01,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094427185] [2021-06-05 04:20:01,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:01,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:01,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094427185] [2021-06-05 04:20:01,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094427185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:01,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749535486] [2021-06-05 04:20:01,673 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 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 04:20:01,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:20:01,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:01,696 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:20:01,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:02,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:20:02,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:20:02,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:20:03,226 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 04:20:03,227 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 04:20:03,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 04:20:03,942 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 268 [2021-06-05 04:20:04,101 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 311 [2021-06-05 04:20:04,922 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 219 [2021-06-05 04:20:05,111 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 280 [2021-06-05 04:20:05,263 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 310 [2021-06-05 04:20:05,379 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 246 [2021-06-05 04:20:05,529 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 242 [2021-06-05 04:20:06,480 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 264 [2021-06-05 04:20:06,697 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 284 [2021-06-05 04:20:06,942 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 307 [2021-06-05 04:20:07,324 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 430 [2021-06-05 04:20:07,887 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 655 DAG size of output: 458 [2021-06-05 04:20:08,436 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 655 DAG size of output: 458 [2021-06-05 04:20:09,090 WARN L205 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 663 DAG size of output: 466 [2021-06-05 04:20:09,524 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 328 [2021-06-05 04:20:10,324 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 190 [2021-06-05 04:20:10,493 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 217 [2021-06-05 04:20:10,721 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 184 [2021-06-05 04:20:11,160 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 190 [2021-06-05 04:20:12,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:20:12,425 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 04:20:12,426 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 04:20:12,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 04:20:13,946 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 263 [2021-06-05 04:20:14,135 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 285 [2021-06-05 04:20:15,462 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 252 [2021-06-05 04:20:15,893 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 649 DAG size of output: 424 [2021-06-05 04:20:17,149 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 266 [2021-06-05 04:20:18,161 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 291 [2021-06-05 04:20:18,560 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 429 [2021-06-05 04:20:19,488 WARN L205 SmtUtils]: Spent 925.00 ms on a formula simplification. DAG size of input: 1007 DAG size of output: 696 [2021-06-05 04:20:20,636 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 1051 DAG size of output: 720 [2021-06-05 04:20:21,977 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 1093 DAG size of output: 752 [2021-06-05 04:20:23,355 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 1093 DAG size of output: 752 [2021-06-05 04:20:24,534 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 1098 DAG size of output: 513 [2021-06-05 04:20:24,642 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 513 [2021-06-05 04:20:24,947 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 458 [2021-06-05 04:20:25,190 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 276 [2021-06-05 04:20:25,875 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 243 [2021-06-05 04:20:26,025 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 267 [2021-06-05 04:20:26,189 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 267 [2021-06-05 04:20:26,377 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 271 [2021-06-05 04:20:26,572 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 280 [2021-06-05 04:20:26,700 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 193 [2021-06-05 04:20:27,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 04:20:27,499 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 04:20:27,499 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 04:20:27,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 04:20:28,736 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 230 [2021-06-05 04:20:28,915 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 277 [2021-06-05 04:20:29,754 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 243 [2021-06-05 04:20:30,071 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 426 [2021-06-05 04:20:30,388 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 426 [2021-06-05 04:20:30,780 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 430 [2021-06-05 04:20:31,120 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 422 [2021-06-05 04:20:31,812 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 04:20:31,830 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 04:20:31,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:20:31,831 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 04:20:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:31,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749535486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:31,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:31,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 04:20:31,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938819627] [2021-06-05 04:20:31,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:20:31,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:31,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:20:31,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:20:31,857 INFO L87 Difference]: Start difference. First operand 951 states and 3088 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:20:32,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:32,355 INFO L93 Difference]: Finished difference Result 1044 states and 3286 transitions. [2021-06-05 04:20:32,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:20:32,356 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:20:32,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:32,357 INFO L225 Difference]: With dead ends: 1044 [2021-06-05 04:20:32,357 INFO L226 Difference]: Without dead ends: 1034 [2021-06-05 04:20:32,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 478.7ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:20:32,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-05 04:20:32,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 951. [2021-06-05 04:20:32,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.2505263157894735) internal successors, (3088), 950 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3088 transitions. [2021-06-05 04:20:32,367 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3088 transitions. Word has length 20 [2021-06-05 04:20:32,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:32,367 INFO L482 AbstractCegarLoop]: Abstraction has 951 states and 3088 transitions. [2021-06-05 04:20:32,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:20:32,368 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3088 transitions. [2021-06-05 04:20:32,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:20:32,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:32,369 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:32,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28149,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:32,569 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:32,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:32,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1412276551, now seen corresponding path program 207 times [2021-06-05 04:20:32,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:32,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095779907] [2021-06-05 04:20:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:32,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:32,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095779907] [2021-06-05 04:20:32,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095779907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:32,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904412225] [2021-06-05 04:20:32,666 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 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 04:20:32,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:20:32,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:32,692 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 04:20:32,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:33,059 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 04:20:33,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:20:33,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:20:33,838 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 316 [2021-06-05 04:20:34,013 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 277 [2021-06-05 04:20:34,173 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 274 [2021-06-05 04:20:35,406 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 272 [2021-06-05 04:20:35,546 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 266 [2021-06-05 04:20:35,732 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 330 [2021-06-05 04:20:36,017 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 433 [2021-06-05 04:20:36,391 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 736 DAG size of output: 517 [2021-06-05 04:20:36,607 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 216 [2021-06-05 04:20:37,507 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 321 [2021-06-05 04:20:37,691 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 339 [2021-06-05 04:20:38,391 WARN L205 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 1144 DAG size of output: 744 [2021-06-05 04:20:39,084 WARN L205 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 1144 DAG size of output: 744 [2021-06-05 04:20:39,834 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 1149 DAG size of output: 749 [2021-06-05 04:20:40,256 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 513 [2021-06-05 04:20:40,400 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 281 [2021-06-05 04:20:41,081 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 477 [2021-06-05 04:20:41,790 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 282 [2021-06-05 04:20:42,295 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 258 [2021-06-05 04:20:42,487 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 324 [2021-06-05 04:20:42,664 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 324 [2021-06-05 04:20:42,862 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 328 [2021-06-05 04:20:43,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:20:43,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:20:43,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:20:43,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:20:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:43,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904412225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:43,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:43,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 04:20:43,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105787167] [2021-06-05 04:20:43,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:20:43,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:43,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:20:43,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:20:43,186 INFO L87 Difference]: Start difference. First operand 951 states and 3088 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:20:43,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:43,710 INFO L93 Difference]: Finished difference Result 1074 states and 3428 transitions. [2021-06-05 04:20:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:20:43,711 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:20:43,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:43,712 INFO L225 Difference]: With dead ends: 1074 [2021-06-05 04:20:43,712 INFO L226 Difference]: Without dead ends: 1058 [2021-06-05 04:20:43,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:20:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-05 04:20:43,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1006. [2021-06-05 04:20:43,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.261691542288557) internal successors, (3278), 1005 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:43,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3278 transitions. [2021-06-05 04:20:43,723 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3278 transitions. Word has length 20 [2021-06-05 04:20:43,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:43,723 INFO L482 AbstractCegarLoop]: Abstraction has 1006 states and 3278 transitions. [2021-06-05 04:20:43,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:20:43,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3278 transitions. [2021-06-05 04:20:43,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:20:43,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:43,724 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:43,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29769,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:43,925 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:43,925 INFO L82 PathProgramCache]: Analyzing trace with hash -553402021, now seen corresponding path program 208 times [2021-06-05 04:20:43,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:43,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926338073] [2021-06-05 04:20:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:44,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:44,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926338073] [2021-06-05 04:20:44,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926338073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:44,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236603695] [2021-06-05 04:20:44,021 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 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 04:20:44,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:20:44,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:44,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:20:44,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:44,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:20:44,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:20:45,140 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 290 [2021-06-05 04:20:45,335 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 298 [2021-06-05 04:20:45,442 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 274 [2021-06-05 04:20:46,416 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 477 DAG size of output: 292 [2021-06-05 04:20:47,296 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 414 [2021-06-05 04:20:47,489 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 414 [2021-06-05 04:20:47,718 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 729 DAG size of output: 418 [2021-06-05 04:20:48,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:20:49,009 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 04:20:49,010 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 04:20:49,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 04:20:49,675 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 291 [2021-06-05 04:20:50,620 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 297 [2021-06-05 04:20:50,840 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 362 [2021-06-05 04:20:51,060 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 362 [2021-06-05 04:20:51,319 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 345 [2021-06-05 04:20:51,797 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 363 [2021-06-05 04:20:51,983 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 242 [2021-06-05 04:20:52,303 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 243 [2021-06-05 04:20:52,691 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 275 [2021-06-05 04:20:52,851 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 275 [2021-06-05 04:20:53,035 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 280 [2021-06-05 04:20:53,192 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 272 [2021-06-05 04:20:54,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:20:54,397 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 04:20:54,398 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 04:20:54,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 04:20:55,134 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 238 [2021-06-05 04:20:55,254 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 246 [2021-06-05 04:20:55,384 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 311 [2021-06-05 04:20:55,554 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 307 [2021-06-05 04:20:55,656 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 260 [2021-06-05 04:20:55,804 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 278 [2021-06-05 04:20:56,378 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 331 [2021-06-05 04:20:57,412 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 344 [2021-06-05 04:20:57,729 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 639 DAG size of output: 487 [2021-06-05 04:20:58,117 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 718 DAG size of output: 527 [2021-06-05 04:20:58,689 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 791 DAG size of output: 555 [2021-06-05 04:20:59,109 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 791 DAG size of output: 555 [2021-06-05 04:20:59,629 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 802 DAG size of output: 565 [2021-06-05 04:20:59,829 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 670 [2021-06-05 04:21:00,315 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 419 [2021-06-05 04:21:00,419 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 215 [2021-06-05 04:21:01,160 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 04:21:01,395 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 04:21:01,396 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 04:21:01,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 04:21:02,506 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 258 [2021-06-05 04:21:03,176 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 04:21:03,194 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 04:21:03,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:21:03,195 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 04:21:03,221 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:03,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236603695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:03,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:03,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 04:21:03,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318175507] [2021-06-05 04:21:03,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:21:03,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:03,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:21:03,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:21:03,222 INFO L87 Difference]: Start difference. First operand 1006 states and 3278 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:21:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:03,916 INFO L93 Difference]: Finished difference Result 1179 states and 3670 transitions. [2021-06-05 04:21:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:21:03,917 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:21:03,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:03,918 INFO L225 Difference]: With dead ends: 1179 [2021-06-05 04:21:03,918 INFO L226 Difference]: Without dead ends: 1153 [2021-06-05 04:21:03,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 504.4ms TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:21:03,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-06-05 04:21:03,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1019. [2021-06-05 04:21:03,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.2652259332023577) internal successors, (3324), 1018 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3324 transitions. [2021-06-05 04:21:03,929 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3324 transitions. Word has length 20 [2021-06-05 04:21:03,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:03,929 INFO L482 AbstractCegarLoop]: Abstraction has 1019 states and 3324 transitions. [2021-06-05 04:21:03,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:21:03,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3324 transitions. [2021-06-05 04:21:03,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:21:03,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:03,930 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:04,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30486 [2021-06-05 04:21:04,130 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:04,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:04,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1157211287, now seen corresponding path program 209 times [2021-06-05 04:21:04,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:04,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617009807] [2021-06-05 04:21:04,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:04,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:04,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617009807] [2021-06-05 04:21:04,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617009807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:04,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105345959] [2021-06-05 04:21:04,226 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 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 04:21:04,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:21:04,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:04,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:21:04,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:04,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:21:04,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:21:05,911 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 253 [2021-06-05 04:21:06,099 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 325 [2021-06-05 04:21:06,352 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 364 [2021-06-05 04:21:06,605 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 364 [2021-06-05 04:21:06,898 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 371 [2021-06-05 04:21:07,250 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 425 [2021-06-05 04:21:07,510 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 341 [2021-06-05 04:21:07,924 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 222 [2021-06-05 04:21:08,452 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 298 [2021-06-05 04:21:08,634 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 298 [2021-06-05 04:21:08,824 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 301 [2021-06-05 04:21:08,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:21:09,432 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 04:21:09,433 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 04:21:09,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 04:21:10,301 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 350 [2021-06-05 04:21:10,440 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 370 [2021-06-05 04:21:10,631 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 527 DAG size of output: 397 [2021-06-05 04:21:10,842 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 419 [2021-06-05 04:21:11,076 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 440 [2021-06-05 04:21:11,575 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 457 [2021-06-05 04:21:11,916 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 482 [2021-06-05 04:21:12,264 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 482 [2021-06-05 04:21:12,678 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 488 [2021-06-05 04:21:12,931 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 489 [2021-06-05 04:21:13,282 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 381 [2021-06-05 04:21:13,488 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 351 [2021-06-05 04:21:13,735 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 348 [2021-06-05 04:21:14,141 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 300 [2021-06-05 04:21:14,507 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 250 [2021-06-05 04:21:14,852 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 316 [2021-06-05 04:21:15,286 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 341 [2021-06-05 04:21:15,580 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 606 DAG size of output: 364 [2021-06-05 04:21:15,903 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 381 [2021-06-05 04:21:16,230 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 394 [2021-06-05 04:21:16,634 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 418 [2021-06-05 04:21:17,090 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 429 [2021-06-05 04:21:17,557 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 429 [2021-06-05 04:21:18,101 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 692 DAG size of output: 430 [2021-06-05 04:21:19,014 WARN L205 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 468 [2021-06-05 04:21:19,438 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 425 [2021-06-05 04:21:19,739 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 356 [2021-06-05 04:21:19,971 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 349 [2021-06-05 04:21:20,175 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 334 [2021-06-05 04:21:20,829 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 230 [2021-06-05 04:21:20,962 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 238 [2021-06-05 04:21:21,137 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 250 [2021-06-05 04:21:21,342 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 261 [2021-06-05 04:21:21,524 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 286 [2021-06-05 04:21:21,775 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 287 [2021-06-05 04:21:21,939 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 275 [2021-06-05 04:21:22,067 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 210 [2021-06-05 04:21:22,708 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 183 [2021-06-05 04:21:23,063 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 317 [2021-06-05 04:21:23,419 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 317 [2021-06-05 04:21:23,747 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 276 [2021-06-05 04:21:24,288 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 299 [2021-06-05 04:21:24,543 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 263 [2021-06-05 04:21:25,055 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 191 [2021-06-05 04:21:25,180 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 203 [2021-06-05 04:21:25,351 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 233 [2021-06-05 04:21:25,519 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 233 [2021-06-05 04:21:25,676 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 206 [2021-06-05 04:21:26,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:21:26,466 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 04:21:26,467 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 04:21:26,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 04:21:26,966 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 272 [2021-06-05 04:21:27,626 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 442 [2021-06-05 04:21:27,857 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 442 [2021-06-05 04:21:28,114 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 370 [2021-06-05 04:21:28,523 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 473 [2021-06-05 04:21:28,630 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 327 [2021-06-05 04:21:28,813 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 292 [2021-06-05 04:21:29,826 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 504 DAG size of output: 308 [2021-06-05 04:21:30,390 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 567 [2021-06-05 04:21:30,737 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 350 [2021-06-05 04:21:31,721 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 282 [2021-06-05 04:21:31,900 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 292 [2021-06-05 04:21:32,140 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 365 [2021-06-05 04:21:32,541 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 958 DAG size of output: 456 [2021-06-05 04:21:32,941 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 958 DAG size of output: 456 [2021-06-05 04:21:33,394 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 968 DAG size of output: 445 [2021-06-05 04:21:33,886 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 589 [2021-06-05 04:21:34,278 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 460 [2021-06-05 04:21:34,516 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 232 [2021-06-05 04:21:35,359 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 268 [2021-06-05 04:21:35,661 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 405 [2021-06-05 04:21:35,969 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 405 [2021-06-05 04:21:36,290 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 635 DAG size of output: 382 [2021-06-05 04:21:36,526 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 346 [2021-06-05 04:21:37,354 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 215 [2021-06-05 04:21:37,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 04:21:37,823 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 04:21:37,823 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 04:21:37,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 04:21:39,246 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 272 [2021-06-05 04:21:39,390 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 311 [2021-06-05 04:21:39,892 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 585 DAG size of output: 358 [2021-06-05 04:21:40,162 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 408 [2021-06-05 04:21:40,436 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 408 [2021-06-05 04:21:40,749 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 648 DAG size of output: 414 [2021-06-05 04:21:40,937 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 451 [2021-06-05 04:21:41,156 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 340 [2021-06-05 04:21:41,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 04:21:41,738 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 04:21:41,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:21:41,739 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 04:21:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:41,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105345959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:41,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:41,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 04:21:41,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763767273] [2021-06-05 04:21:41,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:21:41,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:41,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:21:41,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:21:41,765 INFO L87 Difference]: Start difference. First operand 1019 states and 3324 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:21:42,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:42,250 INFO L93 Difference]: Finished difference Result 1092 states and 3484 transitions. [2021-06-05 04:21:42,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:21:42,250 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:21:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:42,252 INFO L225 Difference]: With dead ends: 1092 [2021-06-05 04:21:42,252 INFO L226 Difference]: Without dead ends: 1082 [2021-06-05 04:21:42,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 424.8ms TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:21:42,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-06-05 04:21:42,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1022. [2021-06-05 04:21:42,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2644466209598435) internal successors, (3333), 1021 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3333 transitions. [2021-06-05 04:21:42,262 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3333 transitions. Word has length 20 [2021-06-05 04:21:42,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:42,262 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3333 transitions. [2021-06-05 04:21:42,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:21:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3333 transitions. [2021-06-05 04:21:42,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:21:42,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:42,263 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:42,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31869,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:42,464 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:42,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1648351013, now seen corresponding path program 210 times [2021-06-05 04:21:42,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:42,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203489112] [2021-06-05 04:21:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:42,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:42,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203489112] [2021-06-05 04:21:42,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203489112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:42,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915371425] [2021-06-05 04:21:42,560 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 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 04:21:42,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:21:42,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:42,584 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:21:42,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:42,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:21:42,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:21:44,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:21:44,640 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 04:21:44,640 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 04:21:44,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 04:21:45,678 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 361 [2021-06-05 04:21:45,877 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 378 [2021-06-05 04:21:46,089 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 378 [2021-06-05 04:21:46,343 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 388 [2021-06-05 04:21:46,641 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 494 [2021-06-05 04:21:46,866 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 378 [2021-06-05 04:21:47,285 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 256 [2021-06-05 04:21:47,718 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 267 [2021-06-05 04:21:47,893 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 316 [2021-06-05 04:21:48,030 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 301 [2021-06-05 04:21:48,659 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 236 [2021-06-05 04:21:48,894 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 231 [2021-06-05 04:21:49,145 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 345 [2021-06-05 04:21:49,404 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 345 [2021-06-05 04:21:49,703 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 353 [2021-06-05 04:21:49,846 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 356 [2021-06-05 04:21:50,155 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 395 [2021-06-05 04:21:50,338 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 352 [2021-06-05 04:21:51,744 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 273 [2021-06-05 04:21:51,967 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 294 [2021-06-05 04:21:52,237 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 343 [2021-06-05 04:21:52,566 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 355 [2021-06-05 04:21:52,906 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 355 [2021-06-05 04:21:53,229 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 327 [2021-06-05 04:21:53,660 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 407 [2021-06-05 04:21:54,091 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 286 [2021-06-05 04:21:54,262 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 266 [2021-06-05 04:21:54,995 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 229 [2021-06-05 04:21:55,264 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 319 [2021-06-05 04:21:55,521 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 319 [2021-06-05 04:21:55,794 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 318 [2021-06-05 04:21:56,164 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 371 [2021-06-05 04:21:56,300 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 293 [2021-06-05 04:21:57,109 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 309 [2021-06-05 04:21:57,303 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 357 [2021-06-05 04:21:57,497 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 357 [2021-06-05 04:21:57,732 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 362 [2021-06-05 04:21:57,931 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 265 [2021-06-05 04:21:58,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 04:21:58,647 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 04:21:58,648 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 04:21:58,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 04:21:59,273 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 249 [2021-06-05 04:21:59,408 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 288 [2021-06-05 04:22:00,290 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 239 [2021-06-05 04:22:00,418 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 239 [2021-06-05 04:22:00,583 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 217 [2021-06-05 04:22:00,710 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 267 [2021-06-05 04:22:01,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 04:22:02,017 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 04:22:02,017 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 04:22:02,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 04:22:02,486 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 190 [2021-06-05 04:22:03,245 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 219 [2021-06-05 04:22:03,945 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 04:22:03,963 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 04:22:03,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:22:03,964 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 04:22:03,990 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:22:03,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915371425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:22:03,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:22:03,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 04:22:03,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114909303] [2021-06-05 04:22:03,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:22:03,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:22:03,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:22:03,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:22:03,991 INFO L87 Difference]: Start difference. First operand 1022 states and 3333 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:22:04,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:22:04,462 INFO L93 Difference]: Finished difference Result 1112 states and 3526 transitions. [2021-06-05 04:22:04,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:22:04,462 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:22:04,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:22:04,463 INFO L225 Difference]: With dead ends: 1112 [2021-06-05 04:22:04,463 INFO L226 Difference]: Without dead ends: 1102 [2021-06-05 04:22:04,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 486.7ms TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:22:04,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-06-05 04:22:04,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1022. [2021-06-05 04:22:04,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2644466209598435) internal successors, (3333), 1021 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:22:04,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3333 transitions. [2021-06-05 04:22:04,474 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3333 transitions. Word has length 20 [2021-06-05 04:22:04,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:22:04,474 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3333 transitions. [2021-06-05 04:22:04,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 04:22:04,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3333 transitions. [2021-06-05 04:22:04,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:22:04,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:22:04,475 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:22:04,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34240 [2021-06-05 04:22:04,675 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:22:04,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:22:04,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1573530903, now seen corresponding path program 211 times [2021-06-05 04:22:04,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:22:04,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120132780] [2021-06-05 04:22:04,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:22:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:22:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:22:04,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:22:04,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120132780] [2021-06-05 04:22:04,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120132780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:22:04,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238781121] [2021-06-05 04:22:04,771 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 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 04:22:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:22:04,795 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:22:04,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:22:05,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:22:05,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:22:06,032 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 260 [2021-06-05 04:22:06,135 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 319 [2021-06-05 04:22:06,309 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 351 [2021-06-05 04:22:06,423 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 265 [2021-06-05 04:22:06,589 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 253 [2021-06-05 04:22:07,240 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 296 [2021-06-05 04:22:07,644 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 361 [2021-06-05 04:22:07,847 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 591 DAG size of output: 390 [2021-06-05 04:22:08,125 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 434 [2021-06-05 04:22:08,333 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 286 [2021-06-05 04:22:09,518 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 244 [2021-06-05 04:22:09,715 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 289 [2021-06-05 04:22:09,929 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 372 [2021-06-05 04:22:10,500 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 1157 DAG size of output: 652 [2021-06-05 04:22:11,199 WARN L205 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 1229 DAG size of output: 708 [2021-06-05 04:22:11,887 WARN L205 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 1229 DAG size of output: 708 [2021-06-05 04:22:12,669 WARN L205 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 1236 DAG size of output: 715 [2021-06-05 04:22:14,154 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 717 DAG size of output: 423 [2021-06-05 04:22:14,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:22:15,417 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 04:22:15,417 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 04:22:15,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 04:22:15,933 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 342 [2021-06-05 04:22:16,439 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 331 [2021-06-05 04:22:16,619 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 481 [2021-06-05 04:22:16,842 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 650 DAG size of output: 501 [2021-06-05 04:22:17,118 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 529 [2021-06-05 04:22:17,458 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 544 [2021-06-05 04:22:18,534 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 414 [2021-06-05 04:22:18,726 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 436 [2021-06-05 04:22:18,970 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 615 DAG size of output: 452 [2021-06-05 04:22:19,597 WARN L205 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 1163 DAG size of output: 819 [2021-06-05 04:22:20,233 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 1163 DAG size of output: 819 [2021-06-05 04:22:21,003 WARN L205 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 1177 DAG size of output: 807 [2021-06-05 04:22:22,073 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 809 DAG size of output: 994 [2021-06-05 04:22:23,016 WARN L205 SmtUtils]: Spent 937.00 ms on a formula simplification. DAG size of input: 718 DAG size of output: 881 [2021-06-05 04:22:23,658 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 638 DAG size of output: 648 [2021-06-05 04:22:23,902 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 566 [2021-06-05 04:22:24,221 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 414 [2021-06-05 04:22:24,377 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 388 [2021-06-05 04:22:24,554 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 369 [2021-06-05 04:22:24,658 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 263 [2021-06-05 04:22:25,271 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 268 [2021-06-05 04:22:25,965 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 281 [2021-06-05 04:22:26,138 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 300 [2021-06-05 04:22:26,504 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 367 [2021-06-05 04:22:27,102 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 690 DAG size of output: 551 [2021-06-05 04:22:27,963 WARN L205 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 677 [2021-06-05 04:22:28,719 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 242 [2021-06-05 04:22:29,396 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 259 [2021-06-05 04:22:29,695 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 320 [2021-06-05 04:22:30,086 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 397 [2021-06-05 04:22:30,563 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 418 [2021-06-05 04:22:31,197 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 507 [2021-06-05 04:22:32,916 WARN L205 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 1053 DAG size of output: 866 [2021-06-05 04:22:33,640 WARN L205 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 542 DAG size of output: 607 [2021-06-05 04:22:34,125 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 545 [2021-06-05 04:22:34,358 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 327 [2021-06-05 04:22:35,176 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 343 [2021-06-05 04:22:35,656 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 291 [2021-06-05 04:22:36,083 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 451 [2021-06-05 04:22:36,597 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 472 [2021-06-05 04:22:37,223 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 587 DAG size of output: 488 [2021-06-05 04:22:38,288 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 885 DAG size of output: 764 [2021-06-05 04:22:38,753 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 549 [2021-06-05 04:22:38,955 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 345 [2021-06-05 04:22:39,639 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 278 [2021-06-05 04:22:40,338 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 253 [2021-06-05 04:22:40,731 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 418 [2021-06-05 04:22:41,244 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 446 [2021-06-05 04:22:41,840 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 474 [2021-06-05 04:22:42,697 WARN L205 SmtUtils]: Spent 854.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 568 [2021-06-05 04:22:44,026 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 994 DAG size of output: 861 [2021-06-05 04:22:46,819 WARN L205 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 1302 DAG size of output: 1160 [2021-06-05 04:22:51,655 WARN L205 SmtUtils]: Spent 4.83 s on a formula simplification. DAG size of input: 1780 DAG size of output: 1685 [2021-06-05 04:22:51,882 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 348 [2021-06-05 04:22:52,221 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 375 [2021-06-05 04:22:52,438 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 333 [2021-06-05 04:22:52,749 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 349 [2021-06-05 04:22:53,224 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 252 [2021-06-05 04:22:53,374 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 270 [2021-06-05 04:22:53,570 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 327 [2021-06-05 04:22:53,752 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 287 [2021-06-05 04:22:54,277 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 327 [2021-06-05 04:22:54,667 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 477 [2021-06-05 04:22:55,131 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 495 [2021-06-05 04:22:55,869 WARN L205 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 552 [2021-06-05 04:22:56,870 WARN L205 SmtUtils]: Spent 997.00 ms on a formula simplification. DAG size of input: 747 DAG size of output: 634 [2021-06-05 04:22:57,247 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 359 [2021-06-05 04:22:57,430 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 316 [2021-06-05 04:22:57,553 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 276 [2021-06-05 04:22:57,699 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 283 [2021-06-05 04:22:57,957 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 250 [2021-06-05 04:22:58,168 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 359 [2021-06-05 04:22:58,569 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 593 DAG size of output: 503 [2021-06-05 04:22:59,059 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 525 [2021-06-05 04:22:59,661 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 533 [2021-06-05 04:23:00,274 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 267 [2021-06-05 04:23:01,145 WARN L205 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 677 DAG size of output: 587 [2021-06-05 04:23:03,318 WARN L205 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 996 DAG size of output: 805 [2021-06-05 04:23:03,438 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 256 [2021-06-05 04:23:03,654 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 265 [2021-06-05 04:23:04,195 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 215 [2021-06-05 04:23:04,804 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 264 [2021-06-05 04:23:05,134 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 304 [2021-06-05 04:23:05,667 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 238 [2021-06-05 04:23:05,874 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 257 [2021-06-05 04:23:06,010 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 273 [2021-06-05 04:23:06,184 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 281 [2021-06-05 04:23:06,781 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 426 [2021-06-05 04:23:09,121 WARN L205 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 1211 DAG size of output: 891 [2021-06-05 04:23:16,569 WARN L205 SmtUtils]: Spent 7.44 s on a formula simplification. DAG size of input: 2487 DAG size of output: 2146 [2021-06-05 04:23:17,519 WARN L205 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 675 DAG size of output: 716 [2021-06-05 04:23:17,734 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 369 [2021-06-05 04:23:18,051 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 395 [2021-06-05 04:23:18,376 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 382 [2021-06-05 04:23:18,601 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 370 [2021-06-05 04:23:18,837 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 342 [2021-06-05 04:23:19,337 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 267 [2021-06-05 04:23:19,499 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 275 [2021-06-05 04:23:19,778 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 428 [2021-06-05 04:23:20,283 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 586 [2021-06-05 04:23:20,543 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 353 [2021-06-05 04:23:20,825 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 352 [2021-06-05 04:23:21,523 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 325 [2021-06-05 04:23:21,905 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 470 [2021-06-05 04:23:22,975 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 813 DAG size of output: 755 [2021-06-05 04:23:23,151 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 343 [2021-06-05 04:23:23,410 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 363 [2021-06-05 04:23:23,932 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 273 [2021-06-05 04:23:24,061 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 332 [2021-06-05 04:23:24,452 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 270 [2021-06-05 04:23:24,701 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 429 [2021-06-05 04:23:25,041 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 455 [2021-06-05 04:23:25,603 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 549 [2021-06-05 04:23:26,386 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 731 DAG size of output: 649 [2021-06-05 04:23:27,348 WARN L205 SmtUtils]: Spent 934.00 ms on a formula simplification. DAG size of input: 765 DAG size of output: 671 [2021-06-05 04:23:29,682 WARN L205 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 1203 DAG size of output: 1037 [2021-06-05 04:23:29,800 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 255 [2021-06-05 04:23:29,959 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 266 [2021-06-05 04:23:30,502 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 254 [2021-06-05 04:23:30,640 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 262 [2021-06-05 04:23:30,756 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 242 [2021-06-05 04:23:31,270 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 246 [2021-06-05 04:23:31,415 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 254 [2021-06-05 04:23:31,617 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 283 [2021-06-05 04:23:32,018 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 364 [2021-06-05 04:23:32,217 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 264 [2021-06-05 04:23:32,812 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 247 [2021-06-05 04:23:32,948 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 268 [2021-06-05 04:23:33,684 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 274 [2021-06-05 04:23:34,030 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 369 [2021-06-05 04:23:34,485 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 409 [2021-06-05 04:23:35,505 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 721 DAG size of output: 540 [2021-06-05 04:23:38,616 WARN L205 SmtUtils]: Spent 3.11 s on a formula simplification. DAG size of input: 1571 DAG size of output: 1210 [2021-06-05 04:23:38,790 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 563 [2021-06-05 04:23:39,677 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 270 [2021-06-05 04:23:39,811 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 285 [2021-06-05 04:23:40,480 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 278 [2021-06-05 04:23:40,652 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 301 [2021-06-05 04:23:41,022 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 377 [2021-06-05 04:23:41,523 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 453 [2021-06-05 04:23:42,112 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 261 [2021-06-05 04:23:42,241 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 281 [2021-06-05 04:23:42,968 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 350 [2021-06-05 04:23:43,349 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 432 [2021-06-05 04:23:43,860 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 483 [2021-06-05 04:23:44,496 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 506 [2021-06-05 04:23:45,769 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 856 DAG size of output: 678 [2021-06-05 04:23:45,993 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 385 [2021-06-05 04:23:46,190 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 399 [2021-06-05 04:23:46,894 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 312 [2021-06-05 04:23:47,405 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 208 [2021-06-05 04:23:47,608 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 247 [2021-06-05 04:23:48,101 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 458 [2021-06-05 04:23:48,701 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 476 [2021-06-05 04:23:49,517 WARN L205 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 620 [2021-06-05 04:23:49,702 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 379 [2021-06-05 04:23:50,455 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 306 [2021-06-05 04:23:50,902 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 221 [2021-06-05 04:23:51,083 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 258 [2021-06-05 04:23:51,539 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 470 [2021-06-05 04:23:52,177 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 584 [2021-06-05 04:23:53,031 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 729 [2021-06-05 04:23:54,018 WARN L205 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 807 DAG size of output: 756 [2021-06-05 04:23:56,086 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 1058 DAG size of output: 1016 [2021-06-05 04:23:59,710 WARN L205 SmtUtils]: Spent 3.62 s on a formula simplification. DAG size of input: 1591 DAG size of output: 1440 [2021-06-05 04:24:03,938 WARN L205 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 1650 DAG size of output: 1493 [2021-06-05 04:24:08,902 WARN L205 SmtUtils]: Spent 4.96 s on a formula simplification. DAG size of input: 1836 DAG size of output: 1636 [2021-06-05 04:24:18,079 WARN L205 SmtUtils]: Spent 9.17 s on a formula simplification. DAG size of input: 2963 DAG size of output: 2563 [2021-06-05 04:24:36,381 WARN L205 SmtUtils]: Spent 18.29 s on a formula simplification. DAG size of input: 4614 DAG size of output: 4052 [2021-06-05 04:24:37,558 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 800 DAG size of output: 976 [2021-06-05 04:24:38,796 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 716 DAG size of output: 682 [2021-06-05 04:24:39,053 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 358 [2021-06-05 04:24:40,221 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 227 [2021-06-05 04:24:40,496 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 229 [2021-06-05 04:24:40,753 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 262 [2021-06-05 04:24:41,069 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 387 [2021-06-05 04:24:41,233 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 330 [2021-06-05 04:24:41,710 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 234 [2021-06-05 04:24:41,947 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 285 [2021-06-05 04:24:42,176 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 301 [2021-06-05 04:24:42,563 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 392 [2021-06-05 04:24:42,852 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 369 [2021-06-05 04:24:43,026 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 354 [2021-06-05 04:24:43,199 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 299 [2021-06-05 04:24:43,442 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 243 [2021-06-05 04:24:43,602 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 257 [2021-06-05 04:24:43,980 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 425 [2021-06-05 04:24:44,168 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 317 [2021-06-05 04:24:44,484 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 251 [2021-06-05 04:24:44,713 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 265 [2021-06-05 04:24:45,425 WARN L205 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 457 [2021-06-05 04:24:46,639 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 791 DAG size of output: 601 [2021-06-05 04:24:47,749 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 903 DAG size of output: 569 [2021-06-05 04:24:49,055 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 917 DAG size of output: 577 [2021-06-05 04:24:49,298 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 556 [2021-06-05 04:24:49,642 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 407 [2021-06-05 04:24:50,384 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 252 [2021-06-05 04:24:50,873 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 196 [2021-06-05 04:24:51,116 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 226 [2021-06-05 04:24:51,444 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 301 [2021-06-05 04:24:51,908 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 387 [2021-06-05 04:24:52,069 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 381 [2021-06-05 04:24:52,250 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 362 [2021-06-05 04:24:53,055 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 196 [2021-06-05 04:24:53,226 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 212 [2021-06-05 04:24:53,427 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 232 [2021-06-05 04:24:53,830 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 408 [2021-06-05 04:24:54,467 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 657 DAG size of output: 540 [2021-06-05 04:24:55,654 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 806 DAG size of output: 647 [2021-06-05 04:24:56,409 WARN L205 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 597 [2021-06-05 04:24:56,912 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 527 DAG size of output: 542 [2021-06-05 04:24:57,181 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 343 [2021-06-05 04:24:57,623 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 303 [2021-06-05 04:24:57,834 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 317 [2021-06-05 04:24:58,447 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 264 [2021-06-05 04:24:58,636 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 278 [2021-06-05 04:24:59,128 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 413 [2021-06-05 04:24:59,707 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 422 [2021-06-05 04:25:00,745 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 832 DAG size of output: 690 [2021-06-05 04:25:01,222 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 554 [2021-06-05 04:25:01,391 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 493 [2021-06-05 04:25:01,966 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 219 [2021-06-05 04:25:02,430 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 210 [2021-06-05 04:25:02,611 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 307 [2021-06-05 04:25:02,980 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 400 [2021-06-05 04:25:03,466 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 427 [2021-06-05 04:25:04,020 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 446 [2021-06-05 04:25:04,812 WARN L205 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 589 [2021-06-05 04:25:06,089 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 947 DAG size of output: 808 [2021-06-05 04:25:08,533 WARN L205 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 1252 DAG size of output: 1075 [2021-06-05 04:25:12,460 WARN L205 SmtUtils]: Spent 3.92 s on a formula simplification. DAG size of input: 1464 DAG size of output: 1303 [2021-06-05 04:25:17,835 WARN L205 SmtUtils]: Spent 5.37 s on a formula simplification. DAG size of input: 1926 DAG size of output: 1441 [2021-06-05 04:25:18,921 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 715 DAG size of output: 728 [2021-06-05 04:25:19,169 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 631 [2021-06-05 04:25:19,894 WARN L205 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 609 DAG size of output: 672 [2021-06-05 04:25:20,074 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 551 [2021-06-05 04:25:20,330 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 405 [2021-06-05 04:25:20,635 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 389 [2021-06-05 04:25:20,787 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 343 [2021-06-05 04:25:21,294 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 216 [2021-06-05 04:25:21,583 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 424 [2021-06-05 04:25:21,797 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 383 [2021-06-05 04:25:22,237 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 268 [2021-06-05 04:25:22,380 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 281 [2021-06-05 04:25:22,566 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 288 [2021-06-05 04:25:22,913 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 418 Received shutdown request... [2021-06-05 04:25:23,671 WARN L205 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 733 DAG size of output: 650 [2021-06-05 04:25:24,690 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 868 DAG size of output: 789 [2021-06-05 04:25:24,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35789 [2021-06-05 04:25:24,895 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 04:25:24,897 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 04:25:24,898 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 04:25:24,898 INFO L202 PluginConnector]: Adding new model unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:25:24 BasicIcfg [2021-06-05 04:25:24,898 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 04:25:24,899 INFO L168 Benchmark]: Toolchain (without parser) took 890720.67 ms. Allocated memory was 343.9 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 322.9 MB in the beginning and 1.1 GB in the end (delta: -742.0 MB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. [2021-06-05 04:25:24,899 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 343.9 MB. Free memory was 324.2 MB in the beginning and 324.1 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:25:24,899 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.47 ms. Allocated memory is still 343.9 MB. Free memory was 322.9 MB in the beginning and 321.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:25:24,899 INFO L168 Benchmark]: Boogie Preprocessor took 11.13 ms. Allocated memory is still 343.9 MB. Free memory was 321.5 MB in the beginning and 320.5 MB in the end (delta: 990.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:25:24,899 INFO L168 Benchmark]: RCFGBuilder took 368.73 ms. Allocated memory is still 343.9 MB. Free memory was 320.4 MB in the beginning and 326.1 MB in the end (delta: -5.7 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:25:24,899 INFO L168 Benchmark]: TraceAbstraction took 890317.59 ms. Allocated memory was 343.9 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 326.1 MB in the beginning and 1.1 GB in the end (delta: -738.9 MB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. [2021-06-05 04:25:24,899 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 0.13 ms. Allocated memory is still 343.9 MB. Free memory was 324.2 MB in the beginning and 324.1 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.47 ms. Allocated memory is still 343.9 MB. Free memory was 322.9 MB in the beginning and 321.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.13 ms. Allocated memory is still 343.9 MB. Free memory was 321.5 MB in the beginning and 320.5 MB in the end (delta: 990.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 368.73 ms. Allocated memory is still 343.9 MB. Free memory was 320.4 MB in the beginning and 326.1 MB in the end (delta: -5.7 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 890317.59 ms. Allocated memory was 343.9 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 326.1 MB in the beginning and 1.1 GB in the end (delta: -738.9 MB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 8,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 8,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 8,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 890219.6ms, OverallIterations: 228, TraceHistogramMax: 8, EmptinessCheckTime: 111.8ms, AutomataDifference: 43529.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4444 SDtfs, 10132 SDslu, 31008 SDs, 0 SdLazy, 55219 SolverSat, 6230 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21504.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7233 GetRequests, 2908 SyntacticMatches, 93 SemanticMatches, 4232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18689 ImplicationChecksByTransitivity, 39514.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1022occurred in iteration=226, InterpolantAutomatonStates: 3738, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 965.1ms AutomataMinimizationTime, 227 MinimizatonAttempts, 21627 StatesRemovedByMinimization, 223 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 576.2ms SsaConstructionTime, 2127.9ms SatisfiabilityAnalysisTime, 592206.9ms InterpolantComputationTime, 7691 NumberOfCodeBlocks, 7691 NumberOfCodeBlocksAsserted, 857 NumberOfCheckSat, 7241 ConstructedInterpolants, 6 QuantifiedInterpolants, 59502 SizeOfPredicates, 284 NumberOfNonLiveVariables, 14878 ConjunctsInSsa, 4464 ConjunctsInUnsatCore, 450 InterpolantComputations, 4 PerfectInterpolantSequences, 2014/10209 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