/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/popl20-more/buffer-series.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:42:13,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:42:13,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:42:13,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:42:14,012 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 23:42:14,025 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:42:14,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:42:14,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:42:14,026 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:42:14,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:42:14,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:42:14,027 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:42:14,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:42:14,027 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:42:14,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:42:14,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:42:14,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:42:14,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:42:14,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:42:14,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:42:14,028 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:42:14,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:42:14,028 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:42:14,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:42:14,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:42:14,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:42:14,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:42:14,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:42:14,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:42:14,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:42:14,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:42:14,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:42:14,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:42:14,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:42:14,030 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:42:14,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:42:14,030 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:42:14,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:42:14,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:42:14,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:42:14,266 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:42:14,270 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:42:14,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl [2021-06-05 23:42:14,270 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl' [2021-06-05 23:42:14,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:42:14,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:42:14,295 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:42:14,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:42:14,295 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:42:14,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:42:14" (1/1) ... [2021-06-05 23:42:14,309 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:42:14" (1/1) ... [2021-06-05 23:42:14,314 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:42:14,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:42:14,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:42:14,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:42:14,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:42:14" (1/1) ... [2021-06-05 23:42:14,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:42:14" (1/1) ... [2021-06-05 23:42:14,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:42:14" (1/1) ... [2021-06-05 23:42:14,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:42:14" (1/1) ... [2021-06-05 23:42:14,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:42:14" (1/1) ... [2021-06-05 23:42:14,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:42:14" (1/1) ... [2021-06-05 23:42:14,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:42:14" (1/1) ... [2021-06-05 23:42:14,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:42:14,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:42:14,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:42:14,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:42:14,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:42:14" (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 23:42:14,377 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:42:14,377 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:42:14,377 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:42:14,377 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:42:14,377 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:42:14,377 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:42:14,377 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:42:14,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:42:14,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:42:14,378 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 23:42:14,378 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 23:42:14,378 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 23:42:14,378 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 23:42:14,378 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 23:42:14,378 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 23:42:14,379 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 23:42:14,554 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:42:14,554 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:42:14,556 INFO L202 PluginConnector]: Adding new model buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:42:14 BoogieIcfgContainer [2021-06-05 23:42:14,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:42:14,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:42:14,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:42:14,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:42:14,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:42:14" (1/2) ... [2021-06-05 23:42:14,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d94dc69 and model type buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:42:14, skipping insertion in model container [2021-06-05 23:42:14,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:42:14" (2/2) ... [2021-06-05 23:42:14,568 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series.wvr.bpl [2021-06-05 23:42:14,571 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:42:14,571 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:42:14,571 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:42:14,572 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:42:14,650 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 23:42:14,663 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 23:42:14,692 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:42:14,692 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:42:14,693 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:42:14,693 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:42:14,693 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:42:14,693 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:42:14,693 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:42:14,693 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:42:14,699 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-06-05 23:42:14,748 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:14,751 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:14,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 23:42:14,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:14,769 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:14,770 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:14,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:14,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1591089523, now seen corresponding path program 1 times [2021-06-05 23:42:14,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:14,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721013759] [2021-06-05 23:42:14,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:14,910 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 23:42:14,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:14,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721013759] [2021-06-05 23:42:14,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721013759] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:42:14,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:42:14,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:42:14,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271873866] [2021-06-05 23:42:14,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:42:14,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:14,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:42:14,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:42:14,928 INFO L87 Difference]: Start difference. First operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 23:42:14,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:14,970 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-06-05 23:42:14,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:42:14,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 23:42:14,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:14,995 INFO L225 Difference]: With dead ends: 1236 [2021-06-05 23:42:14,996 INFO L226 Difference]: Without dead ends: 1109 [2021-06-05 23:42:14,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:42:15,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-06-05 23:42:15,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-06-05 23:42:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:15,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-06-05 23:42:15,099 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-06-05 23:42:15,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:15,100 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-06-05 23:42:15,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 23:42:15,101 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-06-05 23:42:15,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:42:15,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:15,105 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:15,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:42:15,106 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:15,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:15,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1256412427, now seen corresponding path program 1 times [2021-06-05 23:42:15,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:15,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38750378] [2021-06-05 23:42:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:15,174 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 23:42:15,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:15,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38750378] [2021-06-05 23:42:15,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38750378] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:42:15,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:42:15,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:42:15,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233859211] [2021-06-05 23:42:15,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:42:15,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:15,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:42:15,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:42:15,178 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 23:42:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:15,225 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-06-05 23:42:15,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:42:15,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 21 [2021-06-05 23:42:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:15,232 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 23:42:15,232 INFO L226 Difference]: Without dead ends: 1418 [2021-06-05 23:42:15,232 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:42:15,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-06-05 23:42:15,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-06-05 23:42:15,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-06-05 23:42:15,264 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-06-05 23:42:15,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:15,264 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-06-05 23:42:15,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 23:42:15,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-06-05 23:42:15,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:42:15,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:15,268 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:15,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:42:15,268 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:15,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:15,268 INFO L82 PathProgramCache]: Analyzing trace with hash -898961871, now seen corresponding path program 1 times [2021-06-05 23:42:15,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:15,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039820889] [2021-06-05 23:42:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:15,308 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 23:42:15,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:15,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039820889] [2021-06-05 23:42:15,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039820889] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:42:15,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:42:15,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:42:15,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574750637] [2021-06-05 23:42:15,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:42:15,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:15,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:42:15,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:42:15,313 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 23:42:15,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:15,359 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-06-05 23:42:15,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:42:15,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 21 [2021-06-05 23:42:15,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:15,371 INFO L225 Difference]: With dead ends: 2017 [2021-06-05 23:42:15,371 INFO L226 Difference]: Without dead ends: 1875 [2021-06-05 23:42:15,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:42:15,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-06-05 23:42:15,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-06-05 23:42:15,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-06-05 23:42:15,418 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-06-05 23:42:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:15,418 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-06-05 23:42:15,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 23:42:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-06-05 23:42:15,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:42:15,424 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:15,425 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:15,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 23:42:15,425 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:15,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:15,425 INFO L82 PathProgramCache]: Analyzing trace with hash 100882901, now seen corresponding path program 1 times [2021-06-05 23:42:15,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:15,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496096051] [2021-06-05 23:42:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:42:15,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:15,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496096051] [2021-06-05 23:42:15,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496096051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:15,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273102806] [2021-06-05 23:42:15,461 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 23:42:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:15,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:42:15,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:42:15,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273102806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:15,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:15,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-05 23:42:15,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275822053] [2021-06-05 23:42:15,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:42:15,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:15,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:42:15,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:42:15,652 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:15,764 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-06-05 23:42:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:42:15,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:42:15,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:15,772 INFO L225 Difference]: With dead ends: 2308 [2021-06-05 23:42:15,773 INFO L226 Difference]: Without dead ends: 2108 [2021-06-05 23:42:15,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:42:15,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-06-05 23:42:15,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-06-05 23:42:15,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-06-05 23:42:15,813 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-06-05 23:42:15,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:15,813 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-06-05 23:42:15,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:15,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-06-05 23:42:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:42:15,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:15,817 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:16,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:16,033 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:16,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:16,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1080968406, now seen corresponding path program 1 times [2021-06-05 23:42:16,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:16,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906729984] [2021-06-05 23:42:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:42:16,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:16,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906729984] [2021-06-05 23:42:16,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906729984] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:42:16,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:42:16,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:42:16,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292686481] [2021-06-05 23:42:16,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:42:16,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:16,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:42:16,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:42:16,053 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:16,111 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-06-05 23:42:16,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:42:16,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:42:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:16,119 INFO L225 Difference]: With dead ends: 1950 [2021-06-05 23:42:16,119 INFO L226 Difference]: Without dead ends: 1860 [2021-06-05 23:42:16,119 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:42:16,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-06-05 23:42:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-06-05 23:42:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-06-05 23:42:16,153 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-06-05 23:42:16,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:16,153 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-06-05 23:42:16,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-06-05 23:42:16,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:42:16,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:16,156 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:16,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 23:42:16,156 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:16,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:16,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1489193046, now seen corresponding path program 2 times [2021-06-05 23:42:16,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:16,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095853805] [2021-06-05 23:42:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:42:16,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:16,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095853805] [2021-06-05 23:42:16,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095853805] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:42:16,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:42:16,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:42:16,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052536763] [2021-06-05 23:42:16,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:42:16,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:16,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:42:16,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:42:16,173 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:16,219 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-06-05 23:42:16,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:42:16,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:42:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:16,225 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 23:42:16,225 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 23:42:16,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:42:16,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 23:42:16,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-06-05 23:42:16,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-06-05 23:42:16,246 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-06-05 23:42:16,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:16,246 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-06-05 23:42:16,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-06-05 23:42:16,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:42:16,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:16,248 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:16,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 23:42:16,249 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:16,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:16,249 INFO L82 PathProgramCache]: Analyzing trace with hash 373109395, now seen corresponding path program 2 times [2021-06-05 23:42:16,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:16,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730853731] [2021-06-05 23:42:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:42:16,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:16,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730853731] [2021-06-05 23:42:16,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730853731] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:42:16,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:42:16,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:42:16,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630563636] [2021-06-05 23:42:16,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:42:16,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:16,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:42:16,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:42:16,280 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:16,317 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-06-05 23:42:16,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:42:16,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:42:16,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:16,322 INFO L225 Difference]: With dead ends: 1142 [2021-06-05 23:42:16,322 INFO L226 Difference]: Without dead ends: 1120 [2021-06-05 23:42:16,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:42:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-05 23:42:16,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-06-05 23:42:16,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-06-05 23:42:16,345 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-06-05 23:42:16,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:16,345 INFO L482 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-06-05 23:42:16,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-06-05 23:42:16,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:42:16,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:16,347 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:16,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 23:42:16,347 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:16,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:16,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1861969590, now seen corresponding path program 1 times [2021-06-05 23:42:16,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:16,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789077776] [2021-06-05 23:42:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:16,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:16,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789077776] [2021-06-05 23:42:16,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789077776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:16,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174843247] [2021-06-05 23:42:16,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:42:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:16,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 23:42:16,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:16,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174843247] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:42:16,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 23:42:16,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-06-05 23:42:16,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637049545] [2021-06-05 23:42:16,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:42:16,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:16,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:42:16,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:42:16,494 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:16,509 INFO L93 Difference]: Finished difference Result 1344 states and 4969 transitions. [2021-06-05 23:42:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:42:16,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:42:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:16,515 INFO L225 Difference]: With dead ends: 1344 [2021-06-05 23:42:16,515 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 23:42:16,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:42:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 23:42:16,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 926. [2021-06-05 23:42:16,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.6324324324324326) internal successors, (3360), 925 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3360 transitions. [2021-06-05 23:42:16,534 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3360 transitions. Word has length 27 [2021-06-05 23:42:16,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:16,534 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 3360 transitions. [2021-06-05 23:42:16,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,534 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3360 transitions. [2021-06-05 23:42:16,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:42:16,536 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:16,536 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:16,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:16,755 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:16,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:16,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1282023498, now seen corresponding path program 1 times [2021-06-05 23:42:16,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:16,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196692113] [2021-06-05 23:42:16,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:42:16,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:16,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196692113] [2021-06-05 23:42:16,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196692113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:16,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939651735] [2021-06-05 23:42:16,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:16,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 23:42:16,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:42:16,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939651735] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:42:16,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 23:42:16,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-06-05 23:42:16,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685895564] [2021-06-05 23:42:16,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:42:16,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:16,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:42:16,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:42:16,851 INFO L87 Difference]: Start difference. First operand 926 states and 3360 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:16,866 INFO L93 Difference]: Finished difference Result 1608 states and 5808 transitions. [2021-06-05 23:42:16,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:42:16,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:42:16,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:16,873 INFO L225 Difference]: With dead ends: 1608 [2021-06-05 23:42:16,873 INFO L226 Difference]: Without dead ends: 1608 [2021-06-05 23:42:16,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:42:16,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-06-05 23:42:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1079. [2021-06-05 23:42:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 3.6614100185528757) internal successors, (3947), 1078 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3947 transitions. [2021-06-05 23:42:16,894 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3947 transitions. Word has length 27 [2021-06-05 23:42:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:16,895 INFO L482 AbstractCegarLoop]: Abstraction has 1079 states and 3947 transitions. [2021-06-05 23:42:16,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3947 transitions. [2021-06-05 23:42:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:42:16,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:16,897 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:17,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:17,113 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:17,114 INFO L82 PathProgramCache]: Analyzing trace with hash 720950344, now seen corresponding path program 1 times [2021-06-05 23:42:17,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:17,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478674389] [2021-06-05 23:42:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:17,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:17,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478674389] [2021-06-05 23:42:17,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478674389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:17,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288914770] [2021-06-05 23:42:17,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:42:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:17,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:42:17,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:17,404 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 13 treesize of output 9 [2021-06-05 23:42:17,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:17,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:17,412 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 23:42:17,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-06-05 23:42:17,437 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 15 treesize of output 11 [2021-06-05 23:42:17,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:17,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:17,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:17,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-06-05 23:42:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:17,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288914770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:17,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:17,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 23:42:17,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451055111] [2021-06-05 23:42:17,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:42:17,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:17,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:42:17,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:42:17,489 INFO L87 Difference]: Start difference. First operand 1079 states and 3947 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:17,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:17,636 INFO L93 Difference]: Finished difference Result 2449 states and 9125 transitions. [2021-06-05 23:42:17,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:42:17,637 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:42:17,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:17,644 INFO L225 Difference]: With dead ends: 2449 [2021-06-05 23:42:17,644 INFO L226 Difference]: Without dead ends: 2370 [2021-06-05 23:42:17,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:42:17,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-06-05 23:42:17,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 1512. [2021-06-05 23:42:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.7068166776968896) internal successors, (5601), 1511 states have internal predecessors, (5601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:17,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5601 transitions. [2021-06-05 23:42:17,673 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5601 transitions. Word has length 29 [2021-06-05 23:42:17,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:17,674 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5601 transitions. [2021-06-05 23:42:17,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:17,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5601 transitions. [2021-06-05 23:42:17,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:42:17,698 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:17,699 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:17,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:17,916 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:17,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:17,917 INFO L82 PathProgramCache]: Analyzing trace with hash -53868170, now seen corresponding path program 2 times [2021-06-05 23:42:17,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:17,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719329555] [2021-06-05 23:42:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:18,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:18,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719329555] [2021-06-05 23:42:18,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719329555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:18,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619303272] [2021-06-05 23:42:18,051 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 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 23:42:18,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:42:18,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:18,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:42:18,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:18,144 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 17 treesize of output 13 [2021-06-05 23:42:18,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:18,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:18,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:18,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 23:42:18,168 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 15 treesize of output 11 [2021-06-05 23:42:18,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:18,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:18,172 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 23:42:18,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-06-05 23:42:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:18,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619303272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:18,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:18,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 23:42:18,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134911083] [2021-06-05 23:42:18,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:42:18,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:18,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:42:18,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:42:18,214 INFO L87 Difference]: Start difference. First operand 1512 states and 5601 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:18,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:18,373 INFO L93 Difference]: Finished difference Result 2849 states and 10712 transitions. [2021-06-05 23:42:18,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:42:18,373 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:42:18,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:18,381 INFO L225 Difference]: With dead ends: 2849 [2021-06-05 23:42:18,381 INFO L226 Difference]: Without dead ends: 2770 [2021-06-05 23:42:18,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:42:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2021-06-05 23:42:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 1711. [2021-06-05 23:42:18,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 3.7239766081871344) internal successors, (6368), 1710 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 6368 transitions. [2021-06-05 23:42:18,422 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 6368 transitions. Word has length 29 [2021-06-05 23:42:18,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:18,422 INFO L482 AbstractCegarLoop]: Abstraction has 1711 states and 6368 transitions. [2021-06-05 23:42:18,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:18,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 6368 transitions. [2021-06-05 23:42:18,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:42:18,426 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:18,426 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:18,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 23:42:18,642 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:18,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:18,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1931624520, now seen corresponding path program 3 times [2021-06-05 23:42:18,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:18,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995817641] [2021-06-05 23:42:18,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:18,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:18,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995817641] [2021-06-05 23:42:18,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995817641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:18,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793235219] [2021-06-05 23:42:18,749 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 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 23:42:18,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 23:42:18,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:18,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:42:18,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:18,825 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 17 treesize of output 13 [2021-06-05 23:42:18,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:18,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:18,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:18,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 23:42:18,854 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 15 treesize of output 11 [2021-06-05 23:42:18,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:18,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:18,857 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 23:42:18,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-06-05 23:42:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:18,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793235219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:18,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:18,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 23:42:18,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103613853] [2021-06-05 23:42:18,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:42:18,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:18,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:42:18,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:42:18,881 INFO L87 Difference]: Start difference. First operand 1711 states and 6368 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 23:42:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:19,035 INFO L93 Difference]: Finished difference Result 2677 states and 10034 transitions. [2021-06-05 23:42:19,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:42:19,035 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) Word has length 29 [2021-06-05 23:42:19,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:19,043 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 23:42:19,043 INFO L226 Difference]: Without dead ends: 2598 [2021-06-05 23:42:19,043 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:42:19,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-06-05 23:42:19,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 1837. [2021-06-05 23:42:19,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.7265795206971677) internal successors, (6842), 1836 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6842 transitions. [2021-06-05 23:42:19,077 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6842 transitions. Word has length 29 [2021-06-05 23:42:19,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:19,077 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 6842 transitions. [2021-06-05 23:42:19,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 23:42:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6842 transitions. [2021-06-05 23:42:19,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:42:19,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:19,081 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:19,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:19,297 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:19,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:19,297 INFO L82 PathProgramCache]: Analyzing trace with hash 490207522, now seen corresponding path program 4 times [2021-06-05 23:42:19,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:19,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257587633] [2021-06-05 23:42:19,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:19,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:19,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257587633] [2021-06-05 23:42:19,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257587633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:19,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991925857] [2021-06-05 23:42:19,417 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 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 23:42:19,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:42:19,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:19,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:42:19,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:19,499 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 17 treesize of output 13 [2021-06-05 23:42:19,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:19,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:19,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:19,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 23:42:19,520 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 15 treesize of output 11 [2021-06-05 23:42:19,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:19,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:19,523 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 23:42:19,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-06-05 23:42:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:19,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991925857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:19,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:19,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 23:42:19,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760978110] [2021-06-05 23:42:19,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:42:19,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:19,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:42:19,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:42:19,562 INFO L87 Difference]: Start difference. First operand 1837 states and 6842 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 23:42:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:19,797 INFO L93 Difference]: Finished difference Result 3111 states and 11725 transitions. [2021-06-05 23:42:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:42:19,797 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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) Word has length 29 [2021-06-05 23:42:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:19,804 INFO L225 Difference]: With dead ends: 3111 [2021-06-05 23:42:19,804 INFO L226 Difference]: Without dead ends: 3032 [2021-06-05 23:42:19,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:42:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-06-05 23:42:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2051. [2021-06-05 23:42:19,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.7434146341463417) internal successors, (7674), 2050 states have internal predecessors, (7674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 7674 transitions. [2021-06-05 23:42:19,841 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 7674 transitions. Word has length 29 [2021-06-05 23:42:19,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:19,841 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 7674 transitions. [2021-06-05 23:42:19,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 23:42:19,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 7674 transitions. [2021-06-05 23:42:19,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:42:19,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:19,845 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:20,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:20,051 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:20,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:20,052 INFO L82 PathProgramCache]: Analyzing trace with hash -464930448, now seen corresponding path program 5 times [2021-06-05 23:42:20,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:20,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423489998] [2021-06-05 23:42:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:20,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:20,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423489998] [2021-06-05 23:42:20,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423489998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:20,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090671809] [2021-06-05 23:42:20,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:42:20,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:42:20,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:20,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:42:20,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:20,241 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 17 treesize of output 13 [2021-06-05 23:42:20,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:20,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:20,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:20,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 23:42:20,282 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 15 treesize of output 11 [2021-06-05 23:42:20,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:20,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:20,285 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 23:42:20,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-06-05 23:42:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:20,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090671809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:20,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:20,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 23:42:20,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763520365] [2021-06-05 23:42:20,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:42:20,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:20,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:42:20,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:42:20,331 INFO L87 Difference]: Start difference. First operand 2051 states and 7674 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 23:42:20,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:20,541 INFO L93 Difference]: Finished difference Result 2933 states and 11023 transitions. [2021-06-05 23:42:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:42:20,541 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) Word has length 29 [2021-06-05 23:42:20,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:20,548 INFO L225 Difference]: With dead ends: 2933 [2021-06-05 23:42:20,548 INFO L226 Difference]: Without dead ends: 2854 [2021-06-05 23:42:20,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:42:20,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-06-05 23:42:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1852. [2021-06-05 23:42:20,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.731496488384657) internal successors, (6907), 1851 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:20,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6907 transitions. [2021-06-05 23:42:20,581 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6907 transitions. Word has length 29 [2021-06-05 23:42:20,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:20,581 INFO L482 AbstractCegarLoop]: Abstraction has 1852 states and 6907 transitions. [2021-06-05 23:42:20,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 23:42:20,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6907 transitions. [2021-06-05 23:42:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:42:20,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:20,585 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:20,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 23:42:20,793 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:20,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:20,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1689459718, now seen corresponding path program 6 times [2021-06-05 23:42:20,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:20,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876569176] [2021-06-05 23:42:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:20,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:20,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876569176] [2021-06-05 23:42:20,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876569176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:20,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46044701] [2021-06-05 23:42:20,903 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:42:20,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:42:20,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:20,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:42:20,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:20,990 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 15 treesize of output 11 [2021-06-05 23:42:20,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:20,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:20,995 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 23:42:20,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-06-05 23:42:21,015 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 15 treesize of output 11 [2021-06-05 23:42:21,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:21,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:21,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:21,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-06-05 23:42:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:21,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46044701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:21,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:21,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 23:42:21,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580555529] [2021-06-05 23:42:21,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:42:21,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:21,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:42:21,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:42:21,046 INFO L87 Difference]: Start difference. First operand 1852 states and 6907 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 23:42:21,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:21,212 INFO L93 Difference]: Finished difference Result 2807 states and 10501 transitions. [2021-06-05 23:42:21,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:42:21,212 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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) Word has length 29 [2021-06-05 23:42:21,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:21,220 INFO L225 Difference]: With dead ends: 2807 [2021-06-05 23:42:21,220 INFO L226 Difference]: Without dead ends: 2728 [2021-06-05 23:42:21,221 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:42:21,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-06-05 23:42:21,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1892. [2021-06-05 23:42:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.7223691168693813) internal successors, (7039), 1891 states have internal predecessors, (7039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:21,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 7039 transitions. [2021-06-05 23:42:21,256 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 7039 transitions. Word has length 29 [2021-06-05 23:42:21,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:21,256 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 7039 transitions. [2021-06-05 23:42:21,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 23:42:21,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 7039 transitions. [2021-06-05 23:42:21,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:42:21,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:21,259 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:21,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 23:42:21,477 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:21,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:21,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1599438650, now seen corresponding path program 7 times [2021-06-05 23:42:21,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:21,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649263333] [2021-06-05 23:42:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:42:21,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:21,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649263333] [2021-06-05 23:42:21,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649263333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:21,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666681035] [2021-06-05 23:42:21,500 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:42:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:21,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:42:21,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:42:21,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666681035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:21,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:21,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 23:42:21,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78301947] [2021-06-05 23:42:21,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:42:21,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:21,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:42:21,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:42:21,598 INFO L87 Difference]: Start difference. First operand 1892 states and 7039 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:21,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:21,656 INFO L93 Difference]: Finished difference Result 3393 states and 12285 transitions. [2021-06-05 23:42:21,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:42:21,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:42:21,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:21,662 INFO L225 Difference]: With dead ends: 3393 [2021-06-05 23:42:21,662 INFO L226 Difference]: Without dead ends: 3242 [2021-06-05 23:42:21,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:42:21,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-06-05 23:42:21,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2725. [2021-06-05 23:42:21,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 3.752202643171806) internal successors, (10221), 2724 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 10221 transitions. [2021-06-05 23:42:21,705 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 10221 transitions. Word has length 31 [2021-06-05 23:42:21,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:21,705 INFO L482 AbstractCegarLoop]: Abstraction has 2725 states and 10221 transitions. [2021-06-05 23:42:21,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:21,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 10221 transitions. [2021-06-05 23:42:21,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:42:21,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:21,709 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:21,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 23:42:21,921 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:21,921 INFO L82 PathProgramCache]: Analyzing trace with hash 415909830, now seen corresponding path program 8 times [2021-06-05 23:42:21,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:21,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558400615] [2021-06-05 23:42:21,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:21,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:21,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558400615] [2021-06-05 23:42:21,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558400615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:21,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584186445] [2021-06-05 23:42:21,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:42:21,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:42:21,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:21,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:42:21,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:22,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584186445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:22,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:22,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 23:42:22,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942705649] [2021-06-05 23:42:22,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:42:22,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:22,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:42:22,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:42:22,017 INFO L87 Difference]: Start difference. First operand 2725 states and 10221 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:22,080 INFO L93 Difference]: Finished difference Result 5257 states and 19424 transitions. [2021-06-05 23:42:22,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:42:22,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:42:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:22,090 INFO L225 Difference]: With dead ends: 5257 [2021-06-05 23:42:22,090 INFO L226 Difference]: Without dead ends: 5006 [2021-06-05 23:42:22,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:42:22,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-06-05 23:42:22,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4359. [2021-06-05 23:42:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 3.8077099586966496) internal successors, (16594), 4358 states have internal predecessors, (16594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:22,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 16594 transitions. [2021-06-05 23:42:22,174 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 16594 transitions. Word has length 31 [2021-06-05 23:42:22,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:22,175 INFO L482 AbstractCegarLoop]: Abstraction has 4359 states and 16594 transitions. [2021-06-05 23:42:22,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:22,175 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 16594 transitions. [2021-06-05 23:42:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:42:22,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:22,183 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:22,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 23:42:22,397 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:22,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1135351718, now seen corresponding path program 9 times [2021-06-05 23:42:22,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:22,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848553265] [2021-06-05 23:42:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:42:22,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:22,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848553265] [2021-06-05 23:42:22,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848553265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:22,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593491090] [2021-06-05 23:42:22,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:42:22,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:42:22,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:22,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:42:22,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:42:22,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593491090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:22,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:22,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 23:42:22,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599921218] [2021-06-05 23:42:22,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:42:22,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:22,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:42:22,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:42:22,518 INFO L87 Difference]: Start difference. First operand 4359 states and 16594 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:22,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:22,797 INFO L93 Difference]: Finished difference Result 16323 states and 59821 transitions. [2021-06-05 23:42:22,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:42:22,797 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:42:22,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:22,824 INFO L225 Difference]: With dead ends: 16323 [2021-06-05 23:42:22,824 INFO L226 Difference]: Without dead ends: 13965 [2021-06-05 23:42:22,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:42:22,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13965 states. [2021-06-05 23:42:23,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13965 to 7026. [2021-06-05 23:42:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7026 states, 7025 states have (on average 3.893523131672598) internal successors, (27352), 7025 states have internal predecessors, (27352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:23,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7026 states to 7026 states and 27352 transitions. [2021-06-05 23:42:23,034 INFO L78 Accepts]: Start accepts. Automaton has 7026 states and 27352 transitions. Word has length 34 [2021-06-05 23:42:23,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:23,034 INFO L482 AbstractCegarLoop]: Abstraction has 7026 states and 27352 transitions. [2021-06-05 23:42:23,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:23,035 INFO L276 IsEmpty]: Start isEmpty. Operand 7026 states and 27352 transitions. [2021-06-05 23:42:23,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:42:23,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:23,049 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:23,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 23:42:23,257 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:23,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:23,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1002610221, now seen corresponding path program 10 times [2021-06-05 23:42:23,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:23,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574752797] [2021-06-05 23:42:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:42:23,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:23,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574752797] [2021-06-05 23:42:23,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574752797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:23,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467858959] [2021-06-05 23:42:23,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:42:23,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:42:23,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:23,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:42:23,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:23,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:42:23,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467858959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:23,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:23,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 23:42:23,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058824958] [2021-06-05 23:42:23,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:42:23,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:23,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:42:23,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:42:23,431 INFO L87 Difference]: Start difference. First operand 7026 states and 27352 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 23:42:23,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:23,746 INFO L93 Difference]: Finished difference Result 18970 states and 71100 transitions. [2021-06-05 23:42:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:42:23,746 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) Word has length 34 [2021-06-05 23:42:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:23,783 INFO L225 Difference]: With dead ends: 18970 [2021-06-05 23:42:23,783 INFO L226 Difference]: Without dead ends: 18531 [2021-06-05 23:42:23,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:42:23,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18531 states. [2021-06-05 23:42:24,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18531 to 10689. [2021-06-05 23:42:24,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 3.994479790419162) internal successors, (42693), 10688 states have internal predecessors, (42693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:24,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 42693 transitions. [2021-06-05 23:42:24,049 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 42693 transitions. Word has length 34 [2021-06-05 23:42:24,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:24,049 INFO L482 AbstractCegarLoop]: Abstraction has 10689 states and 42693 transitions. [2021-06-05 23:42:24,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 23:42:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 42693 transitions. [2021-06-05 23:42:24,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:42:24,126 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:24,126 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:24,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:24,327 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:24,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:24,327 INFO L82 PathProgramCache]: Analyzing trace with hash 614978514, now seen corresponding path program 11 times [2021-06-05 23:42:24,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:24,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904677353] [2021-06-05 23:42:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:24,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:24,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904677353] [2021-06-05 23:42:24,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904677353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:24,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634160490] [2021-06-05 23:42:24,391 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) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:24,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:42:24,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:24,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:42:24,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:24,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634160490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:24,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:24,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 23:42:24,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373735471] [2021-06-05 23:42:24,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:42:24,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:24,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:42:24,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:42:24,502 INFO L87 Difference]: Start difference. First operand 10689 states and 42693 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:24,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:24,731 INFO L93 Difference]: Finished difference Result 18432 states and 70487 transitions. [2021-06-05 23:42:24,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:42:24,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:42:24,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:24,804 INFO L225 Difference]: With dead ends: 18432 [2021-06-05 23:42:24,808 INFO L226 Difference]: Without dead ends: 18354 [2021-06-05 23:42:24,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:42:24,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-06-05 23:42:25,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 10639. [2021-06-05 23:42:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10639 states, 10638 states have (on average 3.9989659710471894) internal successors, (42541), 10638 states have internal predecessors, (42541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:25,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10639 states to 10639 states and 42541 transitions. [2021-06-05 23:42:25,083 INFO L78 Accepts]: Start accepts. Automaton has 10639 states and 42541 transitions. Word has length 34 [2021-06-05 23:42:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:25,083 INFO L482 AbstractCegarLoop]: Abstraction has 10639 states and 42541 transitions. [2021-06-05 23:42:25,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 10639 states and 42541 transitions. [2021-06-05 23:42:25,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:42:25,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:25,103 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:25,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:25,317 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:25,317 INFO L82 PathProgramCache]: Analyzing trace with hash 307309967, now seen corresponding path program 12 times [2021-06-05 23:42:25,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:25,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382207475] [2021-06-05 23:42:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:42:25,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:25,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382207475] [2021-06-05 23:42:25,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382207475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:25,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294274299] [2021-06-05 23:42:25,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:42:25,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:42:25,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:25,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:42:25,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:42:25,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294274299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:25,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:25,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 23:42:25,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965720931] [2021-06-05 23:42:25,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:42:25,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:25,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:42:25,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:42:25,498 INFO L87 Difference]: Start difference. First operand 10639 states and 42541 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:25,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:25,774 INFO L93 Difference]: Finished difference Result 20371 states and 77140 transitions. [2021-06-05 23:42:25,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:42:25,774 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:42:25,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:25,813 INFO L225 Difference]: With dead ends: 20371 [2021-06-05 23:42:25,813 INFO L226 Difference]: Without dead ends: 18706 [2021-06-05 23:42:25,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:42:25,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18706 states. [2021-06-05 23:42:26,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18706 to 13271. [2021-06-05 23:42:26,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13271 states, 13270 states have (on average 4.00783722682743) internal successors, (53184), 13270 states have internal predecessors, (53184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:26,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 53184 transitions. [2021-06-05 23:42:26,143 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 53184 transitions. Word has length 34 [2021-06-05 23:42:26,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:26,143 INFO L482 AbstractCegarLoop]: Abstraction has 13271 states and 53184 transitions. [2021-06-05 23:42:26,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:26,144 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 53184 transitions. [2021-06-05 23:42:26,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:42:26,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:26,169 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:26,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 23:42:26,384 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:26,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:26,384 INFO L82 PathProgramCache]: Analyzing trace with hash -749871114, now seen corresponding path program 13 times [2021-06-05 23:42:26,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:26,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745049042] [2021-06-05 23:42:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:42:26,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:26,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745049042] [2021-06-05 23:42:26,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745049042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:26,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227357650] [2021-06-05 23:42:26,408 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 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 23:42:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:26,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:42:26,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:26,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227357650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:26,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:26,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 23:42:26,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717246545] [2021-06-05 23:42:26,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:42:26,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:26,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:42:26,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:42:26,589 INFO L87 Difference]: Start difference. First operand 13271 states and 53184 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 23:42:26,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:26,932 INFO L93 Difference]: Finished difference Result 29290 states and 113267 transitions. [2021-06-05 23:42:26,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:42:26,932 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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) Word has length 34 [2021-06-05 23:42:26,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:26,995 INFO L225 Difference]: With dead ends: 29290 [2021-06-05 23:42:26,996 INFO L226 Difference]: Without dead ends: 27668 [2021-06-05 23:42:26,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:42:27,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27668 states. [2021-06-05 23:42:27,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27668 to 18232. [2021-06-05 23:42:27,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18232 states, 18231 states have (on average 4.042016345784653) internal successors, (73690), 18231 states have internal predecessors, (73690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18232 states to 18232 states and 73690 transitions. [2021-06-05 23:42:27,428 INFO L78 Accepts]: Start accepts. Automaton has 18232 states and 73690 transitions. Word has length 34 [2021-06-05 23:42:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:27,429 INFO L482 AbstractCegarLoop]: Abstraction has 18232 states and 73690 transitions. [2021-06-05 23:42:27,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 23:42:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 18232 states and 73690 transitions. [2021-06-05 23:42:27,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:42:27,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:27,458 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:27,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:27,661 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:27,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1681290952, now seen corresponding path program 14 times [2021-06-05 23:42:27,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:27,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072481399] [2021-06-05 23:42:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:42:27,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:27,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072481399] [2021-06-05 23:42:27,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072481399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:27,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316192988] [2021-06-05 23:42:27,686 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 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 23:42:27,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:42:27,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:27,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:42:27,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:27,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316192988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:27,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:27,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 23:42:27,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383436677] [2021-06-05 23:42:27,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:42:27,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:27,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:42:27,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:42:27,792 INFO L87 Difference]: Start difference. First operand 18232 states and 73690 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:28,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:28,200 INFO L93 Difference]: Finished difference Result 27112 states and 106138 transitions. [2021-06-05 23:42:28,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:42:28,201 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:42:28,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:28,266 INFO L225 Difference]: With dead ends: 27112 [2021-06-05 23:42:28,266 INFO L226 Difference]: Without dead ends: 26976 [2021-06-05 23:42:28,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:42:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26976 states. [2021-06-05 23:42:28,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26976 to 18044. [2021-06-05 23:42:28,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18044 states, 18043 states have (on average 4.0432300615197025) internal successors, (72952), 18043 states have internal predecessors, (72952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18044 states to 18044 states and 72952 transitions. [2021-06-05 23:42:28,722 INFO L78 Accepts]: Start accepts. Automaton has 18044 states and 72952 transitions. Word has length 34 [2021-06-05 23:42:28,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:28,723 INFO L482 AbstractCegarLoop]: Abstraction has 18044 states and 72952 transitions. [2021-06-05 23:42:28,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 18044 states and 72952 transitions. [2021-06-05 23:42:28,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:42:28,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:28,843 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:29,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 23:42:29,043 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:29,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:29,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1329276436, now seen corresponding path program 15 times [2021-06-05 23:42:29,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:29,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146702395] [2021-06-05 23:42:29,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:29,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:29,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146702395] [2021-06-05 23:42:29,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146702395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:29,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769458204] [2021-06-05 23:42:29,070 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 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 23:42:29,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:42:29,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:29,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:42:29,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:29,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769458204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:29,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:29,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 23:42:29,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831602535] [2021-06-05 23:42:29,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:42:29,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:29,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:42:29,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:42:29,172 INFO L87 Difference]: Start difference. First operand 18044 states and 72952 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:29,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:29,473 INFO L93 Difference]: Finished difference Result 30228 states and 119473 transitions. [2021-06-05 23:42:29,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:42:29,473 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:42:29,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:29,625 INFO L225 Difference]: With dead ends: 30228 [2021-06-05 23:42:29,626 INFO L226 Difference]: Without dead ends: 30070 [2021-06-05 23:42:29,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:42:29,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30070 states. [2021-06-05 23:42:30,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30070 to 20840. [2021-06-05 23:42:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20840 states, 20839 states have (on average 4.074667690388214) internal successors, (84912), 20839 states have internal predecessors, (84912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:30,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20840 states to 20840 states and 84912 transitions. [2021-06-05 23:42:30,112 INFO L78 Accepts]: Start accepts. Automaton has 20840 states and 84912 transitions. Word has length 34 [2021-06-05 23:42:30,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:30,113 INFO L482 AbstractCegarLoop]: Abstraction has 20840 states and 84912 transitions. [2021-06-05 23:42:30,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:30,113 INFO L276 IsEmpty]: Start isEmpty. Operand 20840 states and 84912 transitions. [2021-06-05 23:42:30,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:42:30,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:30,150 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:30,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 23:42:30,350 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:30,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:30,351 INFO L82 PathProgramCache]: Analyzing trace with hash 190972073, now seen corresponding path program 16 times [2021-06-05 23:42:30,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:30,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728122251] [2021-06-05 23:42:30,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:42:30,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:30,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728122251] [2021-06-05 23:42:30,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728122251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:30,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794114810] [2021-06-05 23:42:30,373 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 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 23:42:30,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:42:30,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:30,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:42:30,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:42:30,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794114810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:30,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:30,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 23:42:30,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397352154] [2021-06-05 23:42:30,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:42:30,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:30,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:42:30,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:42:30,487 INFO L87 Difference]: Start difference. First operand 20840 states and 84912 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 23:42:30,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:30,923 INFO L93 Difference]: Finished difference Result 28338 states and 112394 transitions. [2021-06-05 23:42:30,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:42:30,924 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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) Word has length 34 [2021-06-05 23:42:30,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:31,027 INFO L225 Difference]: With dead ends: 28338 [2021-06-05 23:42:31,028 INFO L226 Difference]: Without dead ends: 28230 [2021-06-05 23:42:31,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:42:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28230 states. [2021-06-05 23:42:31,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28230 to 21970. [2021-06-05 23:42:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21970 states, 21969 states have (on average 4.097774136282944) internal successors, (90024), 21969 states have internal predecessors, (90024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21970 states to 21970 states and 90024 transitions. [2021-06-05 23:42:31,530 INFO L78 Accepts]: Start accepts. Automaton has 21970 states and 90024 transitions. Word has length 34 [2021-06-05 23:42:31,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:31,530 INFO L482 AbstractCegarLoop]: Abstraction has 21970 states and 90024 transitions. [2021-06-05 23:42:31,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 23:42:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 21970 states and 90024 transitions. [2021-06-05 23:42:31,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:42:31,564 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:31,564 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:31,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 23:42:31,764 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:31,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:31,765 INFO L82 PathProgramCache]: Analyzing trace with hash 832677239, now seen corresponding path program 17 times [2021-06-05 23:42:31,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:31,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385685040] [2021-06-05 23:42:31,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 23:42:31,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:31,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385685040] [2021-06-05 23:42:31,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385685040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:31,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992217989] [2021-06-05 23:42:31,784 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 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 23:42:31,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:42:31,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:31,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:42:31,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 23:42:31,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992217989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:31,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:31,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 23:42:31,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59859219] [2021-06-05 23:42:31,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:42:31,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:31,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:42:31,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:42:31,861 INFO L87 Difference]: Start difference. First operand 21970 states and 90024 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:31,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:31,987 INFO L93 Difference]: Finished difference Result 29898 states and 123092 transitions. [2021-06-05 23:42:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:42:31,987 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:42:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:32,195 INFO L225 Difference]: With dead ends: 29898 [2021-06-05 23:42:32,195 INFO L226 Difference]: Without dead ends: 29898 [2021-06-05 23:42:32,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:42:32,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29898 states. [2021-06-05 23:42:32,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29898 to 24224. [2021-06-05 23:42:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24224 states, 24223 states have (on average 4.093588737976304) internal successors, (99159), 24223 states have internal predecessors, (99159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:32,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24224 states to 24224 states and 99159 transitions. [2021-06-05 23:42:32,715 INFO L78 Accepts]: Start accepts. Automaton has 24224 states and 99159 transitions. Word has length 37 [2021-06-05 23:42:32,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:32,715 INFO L482 AbstractCegarLoop]: Abstraction has 24224 states and 99159 transitions. [2021-06-05 23:42:32,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:32,715 INFO L276 IsEmpty]: Start isEmpty. Operand 24224 states and 99159 transitions. [2021-06-05 23:42:32,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:42:32,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:32,755 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:32,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 23:42:32,955 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:32,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:32,956 INFO L82 PathProgramCache]: Analyzing trace with hash -97394957, now seen corresponding path program 18 times [2021-06-05 23:42:32,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:32,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336909729] [2021-06-05 23:42:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:42:32,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:32,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336909729] [2021-06-05 23:42:32,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336909729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:32,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020391958] [2021-06-05 23:42:32,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:42:33,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:42:33,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:33,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:42:33,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:42:33,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020391958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:33,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:33,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 23:42:33,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758881855] [2021-06-05 23:42:33,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:42:33,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:33,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:42:33,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:42:33,068 INFO L87 Difference]: Start difference. First operand 24224 states and 99159 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:33,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:33,258 INFO L93 Difference]: Finished difference Result 37062 states and 153499 transitions. [2021-06-05 23:42:33,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:42:33,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:42:33,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:33,357 INFO L225 Difference]: With dead ends: 37062 [2021-06-05 23:42:33,358 INFO L226 Difference]: Without dead ends: 37062 [2021-06-05 23:42:33,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:42:33,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37062 states. [2021-06-05 23:42:33,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37062 to 34305. [2021-06-05 23:42:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34305 states, 34304 states have (on average 4.138496968283582) internal successors, (141967), 34304 states have internal predecessors, (141967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34305 states to 34305 states and 141967 transitions. [2021-06-05 23:42:34,282 INFO L78 Accepts]: Start accepts. Automaton has 34305 states and 141967 transitions. Word has length 37 [2021-06-05 23:42:34,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:34,282 INFO L482 AbstractCegarLoop]: Abstraction has 34305 states and 141967 transitions. [2021-06-05 23:42:34,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:34,283 INFO L276 IsEmpty]: Start isEmpty. Operand 34305 states and 141967 transitions. [2021-06-05 23:42:34,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:42:34,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:34,351 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:34,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 23:42:34,552 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:34,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:34,552 INFO L82 PathProgramCache]: Analyzing trace with hash 411273525, now seen corresponding path program 19 times [2021-06-05 23:42:34,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:34,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786698169] [2021-06-05 23:42:34,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:34,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:34,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786698169] [2021-06-05 23:42:34,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786698169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:34,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139733227] [2021-06-05 23:42:34,862 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 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 23:42:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:34,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:42:34,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:35,029 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:42:35,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:42:35,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:35,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:35,035 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 23:42:35,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 23:42:35,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:42:35,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:35,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:35,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:35,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 23:42:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:35,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139733227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:35,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:35,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 23:42:35,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456212725] [2021-06-05 23:42:35,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:42:35,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:35,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:42:35,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:42:35,181 INFO L87 Difference]: Start difference. First operand 34305 states and 141967 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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 23:42:36,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:36,563 INFO L93 Difference]: Finished difference Result 68650 states and 282459 transitions. [2021-06-05 23:42:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:42:36,563 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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) Word has length 39 [2021-06-05 23:42:36,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:36,760 INFO L225 Difference]: With dead ends: 68650 [2021-06-05 23:42:36,760 INFO L226 Difference]: Without dead ends: 68595 [2021-06-05 23:42:36,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 861.6ms TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:42:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68595 states. [2021-06-05 23:42:37,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68595 to 35386. [2021-06-05 23:42:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35386 states, 35385 states have (on average 4.1413310724883425) internal successors, (146541), 35385 states have internal predecessors, (146541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35386 states to 35386 states and 146541 transitions. [2021-06-05 23:42:38,069 INFO L78 Accepts]: Start accepts. Automaton has 35386 states and 146541 transitions. Word has length 39 [2021-06-05 23:42:38,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:38,069 INFO L482 AbstractCegarLoop]: Abstraction has 35386 states and 146541 transitions. [2021-06-05 23:42:38,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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 23:42:38,069 INFO L276 IsEmpty]: Start isEmpty. Operand 35386 states and 146541 transitions. [2021-06-05 23:42:38,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:42:38,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:38,128 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:38,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:38,328 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:38,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:38,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1949174297, now seen corresponding path program 20 times [2021-06-05 23:42:38,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:38,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218120425] [2021-06-05 23:42:38,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:38,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:38,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218120425] [2021-06-05 23:42:38,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218120425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:38,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601224898] [2021-06-05 23:42:38,628 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 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 23:42:38,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:42:38,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:38,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:42:38,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:38,794 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:42:38,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:42:38,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:38,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:38,800 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 23:42:38,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 23:42:38,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:42:38,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:38,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:38,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:38,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:42:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:38,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601224898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:38,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:38,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:42:38,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959893768] [2021-06-05 23:42:38,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:42:38,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:38,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:42:38,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:42:38,965 INFO L87 Difference]: Start difference. First operand 35386 states and 146541 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:39,612 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-06-05 23:42:41,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:41,078 INFO L93 Difference]: Finished difference Result 63622 states and 260156 transitions. [2021-06-05 23:42:41,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:42:41,078 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:42:41,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:41,265 INFO L225 Difference]: With dead ends: 63622 [2021-06-05 23:42:41,265 INFO L226 Difference]: Without dead ends: 63406 [2021-06-05 23:42:41,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1258.0ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:42:41,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63406 states. [2021-06-05 23:42:42,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63406 to 35493. [2021-06-05 23:42:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35493 states, 35492 states have (on average 4.143947931928322) internal successors, (147077), 35492 states have internal predecessors, (147077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:42,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35493 states to 35493 states and 147077 transitions. [2021-06-05 23:42:42,190 INFO L78 Accepts]: Start accepts. Automaton has 35493 states and 147077 transitions. Word has length 39 [2021-06-05 23:42:42,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:42,191 INFO L482 AbstractCegarLoop]: Abstraction has 35493 states and 147077 transitions. [2021-06-05 23:42:42,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:42,191 INFO L276 IsEmpty]: Start isEmpty. Operand 35493 states and 147077 transitions. [2021-06-05 23:42:42,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:42:42,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:42,259 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:42,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 23:42:42,460 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:42,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:42,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1346065441, now seen corresponding path program 21 times [2021-06-05 23:42:42,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:42,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198695771] [2021-06-05 23:42:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:42,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:42,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198695771] [2021-06-05 23:42:42,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198695771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:42,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114240764] [2021-06-05 23:42:42,806 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 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 23:42:42,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:42:42,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:42,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:42:42,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:43,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:43,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:43,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 23:42:43,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:43,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:43,055 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 23:42:43,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:81 [2021-06-05 23:42:43,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:43,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 23:42:43,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:43,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:43,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:43,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-05 23:42:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:43,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114240764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:43,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:43,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:42:43,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764128542] [2021-06-05 23:42:43,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:42:43,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:43,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:42:43,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:42:43,379 INFO L87 Difference]: Start difference. First operand 35493 states and 147077 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:45,710 INFO L93 Difference]: Finished difference Result 59288 states and 241076 transitions. [2021-06-05 23:42:45,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:42:45,710 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:42:45,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:45,869 INFO L225 Difference]: With dead ends: 59288 [2021-06-05 23:42:45,870 INFO L226 Difference]: Without dead ends: 59124 [2021-06-05 23:42:45,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1348.5ms TimeCoverageRelationStatistics Valid=530, Invalid=2020, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:42:45,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59124 states. [2021-06-05 23:42:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59124 to 35683. [2021-06-05 23:42:46,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35683 states, 35682 states have (on average 4.1406031052071075) internal successors, (147745), 35682 states have internal predecessors, (147745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:46,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35683 states to 35683 states and 147745 transitions. [2021-06-05 23:42:46,734 INFO L78 Accepts]: Start accepts. Automaton has 35683 states and 147745 transitions. Word has length 39 [2021-06-05 23:42:46,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:46,734 INFO L482 AbstractCegarLoop]: Abstraction has 35683 states and 147745 transitions. [2021-06-05 23:42:46,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:46,734 INFO L276 IsEmpty]: Start isEmpty. Operand 35683 states and 147745 transitions. [2021-06-05 23:42:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:42:46,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:46,796 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:46,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:46,997 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:46,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:46,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1267064945, now seen corresponding path program 22 times [2021-06-05 23:42:46,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:46,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522451284] [2021-06-05 23:42:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:47,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:47,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522451284] [2021-06-05 23:42:47,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522451284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:47,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957714941] [2021-06-05 23:42:47,317 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 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 23:42:47,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:42:47,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:47,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:42:47,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:47,475 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:42:47,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:42:47,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:47,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:47,481 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 23:42:47,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 23:42:47,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:42:47,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:47,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:47,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:47,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:42:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:47,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957714941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:47,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:47,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:42:47,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461498000] [2021-06-05 23:42:47,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:42:47,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:47,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:42:47,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:42:47,651 INFO L87 Difference]: Start difference. First operand 35683 states and 147745 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:49,770 INFO L93 Difference]: Finished difference Result 76962 states and 312761 transitions. [2021-06-05 23:42:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:42:49,770 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:42:49,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:50,201 INFO L225 Difference]: With dead ends: 76962 [2021-06-05 23:42:50,201 INFO L226 Difference]: Without dead ends: 76778 [2021-06-05 23:42:50,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1059.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1804, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:42:50,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76778 states. [2021-06-05 23:42:51,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76778 to 35521. [2021-06-05 23:42:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35521 states, 35520 states have (on average 4.1433277027027025) internal successors, (147171), 35520 states have internal predecessors, (147171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35521 states to 35521 states and 147171 transitions. [2021-06-05 23:42:51,236 INFO L78 Accepts]: Start accepts. Automaton has 35521 states and 147171 transitions. Word has length 39 [2021-06-05 23:42:51,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:51,236 INFO L482 AbstractCegarLoop]: Abstraction has 35521 states and 147171 transitions. [2021-06-05 23:42:51,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:51,236 INFO L276 IsEmpty]: Start isEmpty. Operand 35521 states and 147171 transitions. [2021-06-05 23:42:51,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:42:51,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:51,298 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:51,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 23:42:51,501 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:51,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:51,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2136317753, now seen corresponding path program 23 times [2021-06-05 23:42:51,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:51,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979140577] [2021-06-05 23:42:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:51,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:51,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979140577] [2021-06-05 23:42:51,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979140577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:51,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153801095] [2021-06-05 23:42:51,755 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 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 23:42:51,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:42:51,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:51,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:42:51,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:52,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:52,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:52,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:52,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:52,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 23:42:52,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:42:52,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:52,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:52,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:45 [2021-06-05 23:42:52,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:52,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:52,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 23:42:52,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:52,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:52,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:52,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:61 [2021-06-05 23:42:52,889 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-06-05 23:42:53,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:53,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:53,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:53,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:53,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-06-05 23:42:53,083 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:53,110 INFO L628 ElimStorePlain]: treesize reduction 14, result has 70.8 percent of original size [2021-06-05 23:42:53,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:42:53,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:21 [2021-06-05 23:42:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:53,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153801095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:53,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:53,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:42:53,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199893728] [2021-06-05 23:42:53,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:42:53,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:53,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:42:53,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:42:53,167 INFO L87 Difference]: Start difference. First operand 35521 states and 147171 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:54,045 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2021-06-05 23:42:54,296 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 23:42:54,747 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-06-05 23:42:55,404 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-06-05 23:42:55,828 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 34 [2021-06-05 23:42:56,681 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-06-05 23:42:57,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:57,910 INFO L93 Difference]: Finished difference Result 64923 states and 264691 transitions. [2021-06-05 23:42:57,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:42:57,911 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:42:57,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:58,091 INFO L225 Difference]: With dead ends: 64923 [2021-06-05 23:42:58,091 INFO L226 Difference]: Without dead ends: 64829 [2021-06-05 23:42:58,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 3866.9ms TimeCoverageRelationStatistics Valid=697, Invalid=4133, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:42:58,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64829 states. [2021-06-05 23:42:58,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64829 to 36170. [2021-06-05 23:42:58,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36170 states, 36169 states have (on average 4.1395117365699905) internal successors, (149722), 36169 states have internal predecessors, (149722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36170 states to 36170 states and 149722 transitions. [2021-06-05 23:42:59,206 INFO L78 Accepts]: Start accepts. Automaton has 36170 states and 149722 transitions. Word has length 39 [2021-06-05 23:42:59,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:59,206 INFO L482 AbstractCegarLoop]: Abstraction has 36170 states and 149722 transitions. [2021-06-05 23:42:59,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 36170 states and 149722 transitions. [2021-06-05 23:42:59,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:42:59,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:59,274 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:59,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 23:42:59,475 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:59,476 INFO L82 PathProgramCache]: Analyzing trace with hash -337359375, now seen corresponding path program 24 times [2021-06-05 23:42:59,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:59,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044637638] [2021-06-05 23:42:59,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:59,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:59,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044637638] [2021-06-05 23:42:59,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044637638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:59,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799256046] [2021-06-05 23:42:59,750 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 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 23:42:59,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:42:59,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:59,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:42:59,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:59,936 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:42:59,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:42:59,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:59,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:59,943 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 23:42:59,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:43:00,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:43:00,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:00,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:00,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:00,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 23:43:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:00,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799256046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:00,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:00,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:43:00,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554584437] [2021-06-05 23:43:00,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:43:00,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:00,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:43:00,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:43:00,083 INFO L87 Difference]: Start difference. First operand 36170 states and 149722 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:01,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:01,452 INFO L93 Difference]: Finished difference Result 68165 states and 280651 transitions. [2021-06-05 23:43:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:43:01,452 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:01,653 INFO L225 Difference]: With dead ends: 68165 [2021-06-05 23:43:01,653 INFO L226 Difference]: Without dead ends: 68110 [2021-06-05 23:43:01,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 800.9ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:43:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68110 states. [2021-06-05 23:43:02,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68110 to 35744. [2021-06-05 23:43:02,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35744 states, 35743 states have (on average 4.14192988836975) internal successors, (148045), 35743 states have internal predecessors, (148045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:02,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35744 states to 35744 states and 148045 transitions. [2021-06-05 23:43:02,589 INFO L78 Accepts]: Start accepts. Automaton has 35744 states and 148045 transitions. Word has length 39 [2021-06-05 23:43:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:02,589 INFO L482 AbstractCegarLoop]: Abstraction has 35744 states and 148045 transitions. [2021-06-05 23:43:02,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:02,590 INFO L276 IsEmpty]: Start isEmpty. Operand 35744 states and 148045 transitions. [2021-06-05 23:43:02,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:02,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:02,652 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:02,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 23:43:02,854 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:02,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:02,854 INFO L82 PathProgramCache]: Analyzing trace with hash -201798279, now seen corresponding path program 25 times [2021-06-05 23:43:02,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:02,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809758052] [2021-06-05 23:43:02,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:03,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:03,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809758052] [2021-06-05 23:43:03,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809758052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:03,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977219461] [2021-06-05 23:43:03,166 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 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 23:43:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:03,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:43:03,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:03,346 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:43:03,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:43:03,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:03,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:03,353 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 23:43:03,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:43:03,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:43:03,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:03,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:03,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:03,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:43:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:03,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977219461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:03,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:03,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:43:03,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669087385] [2021-06-05 23:43:03,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:43:03,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:03,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:43:03,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:43:03,483 INFO L87 Difference]: Start difference. First operand 35744 states and 148045 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:03,954 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-06-05 23:43:05,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:05,268 INFO L93 Difference]: Finished difference Result 63705 states and 260677 transitions. [2021-06-05 23:43:05,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:43:05,269 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:05,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:05,444 INFO L225 Difference]: With dead ends: 63705 [2021-06-05 23:43:05,444 INFO L226 Difference]: Without dead ends: 63489 [2021-06-05 23:43:05,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1270.8ms TimeCoverageRelationStatistics Valid=348, Invalid=1722, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:43:05,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63489 states. [2021-06-05 23:43:06,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63489 to 35594. [2021-06-05 23:43:06,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35594 states, 35593 states have (on average 4.1428651701177195) internal successors, (147457), 35593 states have internal predecessors, (147457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35594 states to 35594 states and 147457 transitions. [2021-06-05 23:43:06,631 INFO L78 Accepts]: Start accepts. Automaton has 35594 states and 147457 transitions. Word has length 39 [2021-06-05 23:43:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:06,631 INFO L482 AbstractCegarLoop]: Abstraction has 35594 states and 147457 transitions. [2021-06-05 23:43:06,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 35594 states and 147457 transitions. [2021-06-05 23:43:06,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:06,702 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:06,703 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:06,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:06,905 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:06,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:06,905 INFO L82 PathProgramCache]: Analyzing trace with hash 401310577, now seen corresponding path program 26 times [2021-06-05 23:43:06,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:06,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271221222] [2021-06-05 23:43:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:07,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:07,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271221222] [2021-06-05 23:43:07,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271221222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:07,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894795156] [2021-06-05 23:43:07,252 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 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 23:43:07,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:43:07,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:07,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:43:07,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:07,453 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:43:07,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:43:07,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:07,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:07,462 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 23:43:07,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:43:07,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:43:07,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:07,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:07,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:07,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:43:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:07,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894795156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:07,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:07,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:43:07,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298005074] [2021-06-05 23:43:07,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:43:07,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:07,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:43:07,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:43:07,616 INFO L87 Difference]: Start difference. First operand 35594 states and 147457 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:09,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:09,094 INFO L93 Difference]: Finished difference Result 62825 states and 257100 transitions. [2021-06-05 23:43:09,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:43:09,094 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:09,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:09,267 INFO L225 Difference]: With dead ends: 62825 [2021-06-05 23:43:09,267 INFO L226 Difference]: Without dead ends: 62633 [2021-06-05 23:43:09,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 995.7ms TimeCoverageRelationStatistics Valid=299, Invalid=1423, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:43:09,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62633 states. [2021-06-05 23:43:10,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62633 to 35555. [2021-06-05 23:43:10,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35555 states, 35554 states have (on average 4.1431906395904825) internal successors, (147307), 35554 states have internal predecessors, (147307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:10,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35555 states to 35555 states and 147307 transitions. [2021-06-05 23:43:10,194 INFO L78 Accepts]: Start accepts. Automaton has 35555 states and 147307 transitions. Word has length 39 [2021-06-05 23:43:10,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:10,194 INFO L482 AbstractCegarLoop]: Abstraction has 35555 states and 147307 transitions. [2021-06-05 23:43:10,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:10,194 INFO L276 IsEmpty]: Start isEmpty. Operand 35555 states and 147307 transitions. [2021-06-05 23:43:10,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:10,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:10,259 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:10,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 23:43:10,459 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:10,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:10,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1628962993, now seen corresponding path program 27 times [2021-06-05 23:43:10,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:10,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221872153] [2021-06-05 23:43:10,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:10,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:10,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221872153] [2021-06-05 23:43:10,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221872153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:10,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610831631] [2021-06-05 23:43:10,706 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:10,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:43:10,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:10,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:43:10,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:10,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:11,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:11,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 23:43:11,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:11,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:11,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:43:11,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:50 [2021-06-05 23:43:11,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:11,149 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 46 [2021-06-05 23:43:11,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:11,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:11,171 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 23:43:11,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:116 [2021-06-05 23:43:11,612 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-06-05 23:43:11,791 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_9, q2], 3=[v_prenex_10]} [2021-06-05 23:43:11,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:11,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:43:11,801 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:11,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:11,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:43:11,811 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:11,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:11,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:11,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-06-05 23:43:11,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:11,977 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 23:43:11,977 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.1 percent of original size [2021-06-05 23:43:11,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:11,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:11,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:11,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 23:43:11,989 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:11,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:11,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:43:11,993 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:12,049 INFO L628 ElimStorePlain]: treesize reduction 69, result has 49.3 percent of original size [2021-06-05 23:43:12,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 23:43:12,052 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:175, output treesize:65 [2021-06-05 23:43:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:12,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610831631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:12,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:12,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:43:12,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806938321] [2021-06-05 23:43:12,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:43:12,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:12,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:43:12,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:43:12,122 INFO L87 Difference]: Start difference. First operand 35555 states and 147307 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:13,371 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 73 [2021-06-05 23:43:13,730 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-06-05 23:43:13,924 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-05 23:43:14,973 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2021-06-05 23:43:15,602 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 69 [2021-06-05 23:43:17,680 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-06-05 23:43:18,061 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-05 23:43:18,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:18,973 INFO L93 Difference]: Finished difference Result 67568 states and 274876 transitions. [2021-06-05 23:43:18,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 23:43:18,974 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:18,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:19,159 INFO L225 Difference]: With dead ends: 67568 [2021-06-05 23:43:19,159 INFO L226 Difference]: Without dead ends: 67486 [2021-06-05 23:43:19,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3015 ImplicationChecksByTransitivity, 5895.9ms TimeCoverageRelationStatistics Valid=980, Invalid=8526, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 23:43:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67486 states. [2021-06-05 23:43:19,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67486 to 36428. [2021-06-05 23:43:19,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36428 states, 36427 states have (on average 4.138166744447799) internal successors, (150741), 36427 states have internal predecessors, (150741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:20,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36428 states to 36428 states and 150741 transitions. [2021-06-05 23:43:20,086 INFO L78 Accepts]: Start accepts. Automaton has 36428 states and 150741 transitions. Word has length 39 [2021-06-05 23:43:20,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:20,086 INFO L482 AbstractCegarLoop]: Abstraction has 36428 states and 150741 transitions. [2021-06-05 23:43:20,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:20,086 INFO L276 IsEmpty]: Start isEmpty. Operand 36428 states and 150741 transitions. [2021-06-05 23:43:20,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:20,149 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:20,149 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:20,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:20,350 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:20,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:20,350 INFO L82 PathProgramCache]: Analyzing trace with hash -867045925, now seen corresponding path program 28 times [2021-06-05 23:43:20,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:20,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078125223] [2021-06-05 23:43:20,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:20,738 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 23:43:20,766 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:20,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:20,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078125223] [2021-06-05 23:43:20,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078125223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:20,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808030960] [2021-06-05 23:43:20,767 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 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 23:43:20,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:43:20,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:20,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:43:20,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:20,957 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:43:20,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:43:20,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:20,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:20,965 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 23:43:20,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-06-05 23:43:20,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:43:20,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:20,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:20,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:20,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 23:43:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:21,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808030960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:21,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:21,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:43:21,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320159666] [2021-06-05 23:43:21,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:43:21,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:21,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:43:21,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:43:21,057 INFO L87 Difference]: Start difference. First operand 36428 states and 150741 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:22,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:22,535 INFO L93 Difference]: Finished difference Result 68647 states and 282569 transitions. [2021-06-05 23:43:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:43:22,536 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:22,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:22,738 INFO L225 Difference]: With dead ends: 68647 [2021-06-05 23:43:22,739 INFO L226 Difference]: Without dead ends: 68592 [2021-06-05 23:43:22,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 915.9ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:43:22,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68592 states. [2021-06-05 23:43:23,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68592 to 36130. [2021-06-05 23:43:23,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36130 states, 36129 states have (on average 4.138116194746602) internal successors, (149506), 36129 states have internal predecessors, (149506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36130 states to 36130 states and 149506 transitions. [2021-06-05 23:43:23,713 INFO L78 Accepts]: Start accepts. Automaton has 36130 states and 149506 transitions. Word has length 39 [2021-06-05 23:43:23,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:23,714 INFO L482 AbstractCegarLoop]: Abstraction has 36130 states and 149506 transitions. [2021-06-05 23:43:23,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:23,714 INFO L276 IsEmpty]: Start isEmpty. Operand 36130 states and 149506 transitions. [2021-06-05 23:43:23,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:23,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:23,776 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:23,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 23:43:23,976 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:23,976 INFO L82 PathProgramCache]: Analyzing trace with hash -731484829, now seen corresponding path program 29 times [2021-06-05 23:43:23,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:23,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074812660] [2021-06-05 23:43:23,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:24,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:24,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074812660] [2021-06-05 23:43:24,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074812660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:24,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970758873] [2021-06-05 23:43:24,283 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 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 23:43:24,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:43:24,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:24,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:43:24,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:24,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:24,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:24,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:24,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:24,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 23:43:24,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:43:24,533 INFO L628 ElimStorePlain]: treesize reduction 37, result has 52.6 percent of original size [2021-06-05 23:43:24,538 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 23:43:24,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:42 [2021-06-05 23:43:24,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:43:24,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:24,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:24,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:43:24,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:43:24,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:24,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:24,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:24,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:24,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 23:43:24,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:43:24,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:24,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:24,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 23:43:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:24,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970758873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:24,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:24,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:43:24,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171668389] [2021-06-05 23:43:24,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:43:24,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:24,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:43:24,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:43:24,797 INFO L87 Difference]: Start difference. First operand 36130 states and 149506 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:25,704 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-06-05 23:43:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:28,559 INFO L93 Difference]: Finished difference Result 71366 states and 291021 transitions. [2021-06-05 23:43:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 23:43:28,560 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:28,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:28,759 INFO L225 Difference]: With dead ends: 71366 [2021-06-05 23:43:28,759 INFO L226 Difference]: Without dead ends: 70937 [2021-06-05 23:43:28,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 2540.8ms TimeCoverageRelationStatistics Valid=717, Invalid=5135, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:43:28,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70937 states. [2021-06-05 23:43:29,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70937 to 36685. [2021-06-05 23:43:29,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36685 states, 36684 states have (on average 4.133873078181224) internal successors, (151647), 36684 states have internal predecessors, (151647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36685 states to 36685 states and 151647 transitions. [2021-06-05 23:43:29,711 INFO L78 Accepts]: Start accepts. Automaton has 36685 states and 151647 transitions. Word has length 39 [2021-06-05 23:43:29,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:29,711 INFO L482 AbstractCegarLoop]: Abstraction has 36685 states and 151647 transitions. [2021-06-05 23:43:29,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:29,712 INFO L276 IsEmpty]: Start isEmpty. Operand 36685 states and 151647 transitions. [2021-06-05 23:43:29,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:29,776 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:29,776 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:29,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-06-05 23:43:29,977 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:29,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:29,977 INFO L82 PathProgramCache]: Analyzing trace with hash -869929743, now seen corresponding path program 30 times [2021-06-05 23:43:29,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:29,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667046937] [2021-06-05 23:43:29,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:30,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:30,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667046937] [2021-06-05 23:43:30,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667046937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:30,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816395105] [2021-06-05 23:43:30,291 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 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 23:43:30,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:43:30,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:30,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 23:43:30,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:30,487 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:43:30,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:43:30,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:30,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:30,493 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 23:43:30,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:43:30,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:43:30,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:30,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:30,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:30,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:43:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:30,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816395105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:30,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:30,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:43:30,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441461434] [2021-06-05 23:43:30,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:43:30,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:30,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:43:30,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:43:30,596 INFO L87 Difference]: Start difference. First operand 36685 states and 151647 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:33,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:33,072 INFO L93 Difference]: Finished difference Result 78913 states and 320376 transitions. [2021-06-05 23:43:33,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:43:33,072 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:33,316 INFO L225 Difference]: With dead ends: 78913 [2021-06-05 23:43:33,317 INFO L226 Difference]: Without dead ends: 78697 [2021-06-05 23:43:33,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1369.6ms TimeCoverageRelationStatistics Valid=424, Invalid=2228, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:43:33,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78697 states. [2021-06-05 23:43:34,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78697 to 36285. [2021-06-05 23:43:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36285 states, 36284 states have (on average 4.13661669055231) internal successors, (150093), 36284 states have internal predecessors, (150093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36285 states to 36285 states and 150093 transitions. [2021-06-05 23:43:34,395 INFO L78 Accepts]: Start accepts. Automaton has 36285 states and 150093 transitions. Word has length 39 [2021-06-05 23:43:34,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:34,395 INFO L482 AbstractCegarLoop]: Abstraction has 36285 states and 150093 transitions. [2021-06-05 23:43:34,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:34,396 INFO L276 IsEmpty]: Start isEmpty. Operand 36285 states and 150093 transitions. [2021-06-05 23:43:34,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:34,459 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:34,459 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:34,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:34,659 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:34,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:34,660 INFO L82 PathProgramCache]: Analyzing trace with hash 471732141, now seen corresponding path program 31 times [2021-06-05 23:43:34,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:34,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914718301] [2021-06-05 23:43:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:34,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:34,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914718301] [2021-06-05 23:43:34,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914718301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:34,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838345359] [2021-06-05 23:43:34,921 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:43:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:34,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:43:34,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:35,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:43:35,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:35,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:35,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:35,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:43:35,168 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:43:35,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 23:43:35,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:35,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:35,171 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 23:43:35,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:15 [2021-06-05 23:43:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:35,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838345359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:35,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:35,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 23:43:35,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705014318] [2021-06-05 23:43:35,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:43:35,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:35,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:43:35,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:43:35,219 INFO L87 Difference]: Start difference. First operand 36285 states and 150093 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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 23:43:36,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:36,697 INFO L93 Difference]: Finished difference Result 71999 states and 296239 transitions. [2021-06-05 23:43:36,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:43:36,698 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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) Word has length 39 [2021-06-05 23:43:36,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:36,901 INFO L225 Difference]: With dead ends: 71999 [2021-06-05 23:43:36,902 INFO L226 Difference]: Without dead ends: 71944 [2021-06-05 23:43:36,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 732.3ms TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:43:36,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71944 states. [2021-06-05 23:43:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71944 to 36473. [2021-06-05 23:43:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36473 states, 36472 states have (on average 4.142684799298092) internal successors, (151092), 36472 states have internal predecessors, (151092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36473 states to 36473 states and 151092 transitions. [2021-06-05 23:43:37,971 INFO L78 Accepts]: Start accepts. Automaton has 36473 states and 151092 transitions. Word has length 39 [2021-06-05 23:43:37,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:37,971 INFO L482 AbstractCegarLoop]: Abstraction has 36473 states and 151092 transitions. [2021-06-05 23:43:37,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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 23:43:37,971 INFO L276 IsEmpty]: Start isEmpty. Operand 36473 states and 151092 transitions. [2021-06-05 23:43:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:38,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:38,034 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:38,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 23:43:38,234 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:38,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:38,235 INFO L82 PathProgramCache]: Analyzing trace with hash -165855889, now seen corresponding path program 32 times [2021-06-05 23:43:38,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:38,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458698706] [2021-06-05 23:43:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:38,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:38,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458698706] [2021-06-05 23:43:38,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458698706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:38,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668665482] [2021-06-05 23:43:38,491 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 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 23:43:38,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:43:38,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:38,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:43:38,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:38,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:43:38,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:38,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:38,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:38,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-05 23:43:38,989 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:43:38,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 23:43:38,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:38,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:38,992 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 23:43:38,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-06-05 23:43:39,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:39,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:43:39,028 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:39,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:39,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:39,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:43:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:39,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668665482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:39,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:39,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:43:39,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987808144] [2021-06-05 23:43:39,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:43:39,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:39,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:43:39,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:43:39,074 INFO L87 Difference]: Start difference. First operand 36473 states and 151092 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:41,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:41,177 INFO L93 Difference]: Finished difference Result 91941 states and 379072 transitions. [2021-06-05 23:43:41,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:43:41,177 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:41,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:41,432 INFO L225 Difference]: With dead ends: 91941 [2021-06-05 23:43:41,433 INFO L226 Difference]: Without dead ends: 91886 [2021-06-05 23:43:41,433 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1305.8ms TimeCoverageRelationStatistics Valid=360, Invalid=2190, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:43:41,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91886 states. [2021-06-05 23:43:42,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91886 to 36713. [2021-06-05 23:43:42,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36713 states, 36712 states have (on average 4.144475920679887) internal successors, (152152), 36712 states have internal predecessors, (152152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36713 states to 36713 states and 152152 transitions. [2021-06-05 23:43:42,557 INFO L78 Accepts]: Start accepts. Automaton has 36713 states and 152152 transitions. Word has length 39 [2021-06-05 23:43:42,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:42,557 INFO L482 AbstractCegarLoop]: Abstraction has 36713 states and 152152 transitions. [2021-06-05 23:43:42,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:42,558 INFO L276 IsEmpty]: Start isEmpty. Operand 36713 states and 152152 transitions. [2021-06-05 23:43:42,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:42,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:42,622 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:42,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:42,823 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:42,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:42,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1253137135, now seen corresponding path program 33 times [2021-06-05 23:43:42,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:42,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078823552] [2021-06-05 23:43:42,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:43,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:43,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078823552] [2021-06-05 23:43:43,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078823552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:43,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686242831] [2021-06-05 23:43:43,060 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 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 23:43:43,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:43:43,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:43,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 23:43:43,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:43,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:43,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:43,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:43:43,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:43,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:43,435 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 23:43:43,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 23:43:43,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:43,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:43,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 53 [2021-06-05 23:43:43,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:43,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:43,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:43,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:43:43,784 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-06-05 23:43:43,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:43,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:43,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 23:43:43,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:43:43,854 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 23:43:43,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 12 [2021-06-05 23:43:43,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:43,863 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 23:43:43,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 12 [2021-06-05 23:43:43,864 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:43,928 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.1 percent of original size [2021-06-05 23:43:43,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:43:43,930 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:116, output treesize:81 [2021-06-05 23:43:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:44,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686242831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:44,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:44,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:43:44,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383512461] [2021-06-05 23:43:44,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:43:44,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:44,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:43:44,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:43:44,046 INFO L87 Difference]: Start difference. First operand 36713 states and 152152 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:46,381 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-06-05 23:43:48,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:48,610 INFO L93 Difference]: Finished difference Result 87602 states and 358764 transitions. [2021-06-05 23:43:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 23:43:48,610 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:48,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:49,005 INFO L225 Difference]: With dead ends: 87602 [2021-06-05 23:43:49,006 INFO L226 Difference]: Without dead ends: 87508 [2021-06-05 23:43:49,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 3155.5ms TimeCoverageRelationStatistics Valid=782, Invalid=5698, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 23:43:49,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87508 states. [2021-06-05 23:43:50,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87508 to 37105. [2021-06-05 23:43:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37105 states, 37104 states have (on average 4.141116860715826) internal successors, (153652), 37104 states have internal predecessors, (153652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:50,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37105 states to 37105 states and 153652 transitions. [2021-06-05 23:43:50,165 INFO L78 Accepts]: Start accepts. Automaton has 37105 states and 153652 transitions. Word has length 39 [2021-06-05 23:43:50,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:50,165 INFO L482 AbstractCegarLoop]: Abstraction has 37105 states and 153652 transitions. [2021-06-05 23:43:50,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:50,165 INFO L276 IsEmpty]: Start isEmpty. Operand 37105 states and 153652 transitions. [2021-06-05 23:43:50,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:50,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:50,229 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:50,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:50,429 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:50,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:50,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1564815849, now seen corresponding path program 34 times [2021-06-05 23:43:50,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:50,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797099] [2021-06-05 23:43:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:50,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:50,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797099] [2021-06-05 23:43:50,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:50,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561210254] [2021-06-05 23:43:50,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:43:50,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:43:50,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:50,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:43:50,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:51,021 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:43:51,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 23:43:51,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:51,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:51,029 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 23:43:51,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 23:43:51,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:43:51,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:51,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:51,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:51,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:43:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:51,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561210254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:51,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:51,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:43:51,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750563704] [2021-06-05 23:43:51,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:43:51,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:51,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:43:51,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:43:51,105 INFO L87 Difference]: Start difference. First operand 37105 states and 153652 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:52,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:52,550 INFO L93 Difference]: Finished difference Result 65546 states and 267894 transitions. [2021-06-05 23:43:52,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:43:52,550 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:52,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:52,730 INFO L225 Difference]: With dead ends: 65546 [2021-06-05 23:43:52,730 INFO L226 Difference]: Without dead ends: 65298 [2021-06-05 23:43:52,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 993.6ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:43:52,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65298 states. [2021-06-05 23:43:53,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65298 to 37291. [2021-06-05 23:43:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37291 states, 37290 states have (on average 4.139233038348083) internal successors, (154352), 37290 states have internal predecessors, (154352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37291 states to 37291 states and 154352 transitions. [2021-06-05 23:43:53,718 INFO L78 Accepts]: Start accepts. Automaton has 37291 states and 154352 transitions. Word has length 39 [2021-06-05 23:43:53,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:53,718 INFO L482 AbstractCegarLoop]: Abstraction has 37291 states and 154352 transitions. [2021-06-05 23:43:53,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:53,718 INFO L276 IsEmpty]: Start isEmpty. Operand 37291 states and 154352 transitions. [2021-06-05 23:43:53,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:53,782 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:53,782 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:53,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 23:43:53,982 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:53,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:53,983 INFO L82 PathProgramCache]: Analyzing trace with hash 452270203, now seen corresponding path program 35 times [2021-06-05 23:43:53,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:53,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940097621] [2021-06-05 23:43:53,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:54,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:54,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940097621] [2021-06-05 23:43:54,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940097621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:54,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606428365] [2021-06-05 23:43:54,294 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 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 23:43:54,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:43:54,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:54,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 23:43:54,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:54,894 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-06-05 23:43:54,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:54,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 23:43:54,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:54,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:54,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:43:54,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:81 [2021-06-05 23:43:55,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:55,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2021-06-05 23:43:55,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:55,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:55,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 23:43:55,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:55,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:55,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-06-05 23:43:55,026 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:55,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:55,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 23:43:55,055 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:178, output treesize:85 [2021-06-05 23:43:55,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:55,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:55,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:55,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:55,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 23:43:55,253 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:55,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:55,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:55,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 23:43:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:55,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606428365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:55,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:55,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:43:55,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059448666] [2021-06-05 23:43:55,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:43:55,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:55,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:43:55,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:43:55,315 INFO L87 Difference]: Start difference. First operand 37291 states and 154352 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:57,477 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-06-05 23:44:00,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:00,685 INFO L93 Difference]: Finished difference Result 85788 states and 347843 transitions. [2021-06-05 23:44:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 23:44:00,685 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:00,918 INFO L225 Difference]: With dead ends: 85788 [2021-06-05 23:44:00,918 INFO L226 Difference]: Without dead ends: 85305 [2021-06-05 23:44:00,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2274 ImplicationChecksByTransitivity, 3984.1ms TimeCoverageRelationStatistics Valid=1151, Invalid=6681, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 23:44:01,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85305 states. [2021-06-05 23:44:01,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85305 to 37473. [2021-06-05 23:44:01,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37473 states, 37472 states have (on average 4.138076430401366) internal successors, (155062), 37472 states have internal predecessors, (155062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:02,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37473 states to 37473 states and 155062 transitions. [2021-06-05 23:44:02,020 INFO L78 Accepts]: Start accepts. Automaton has 37473 states and 155062 transitions. Word has length 39 [2021-06-05 23:44:02,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:02,021 INFO L482 AbstractCegarLoop]: Abstraction has 37473 states and 155062 transitions. [2021-06-05 23:44:02,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:02,021 INFO L276 IsEmpty]: Start isEmpty. Operand 37473 states and 155062 transitions. [2021-06-05 23:44:02,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:02,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:02,084 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:02,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 23:44:02,285 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:02,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:02,285 INFO L82 PathProgramCache]: Analyzing trace with hash 656190949, now seen corresponding path program 36 times [2021-06-05 23:44:02,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:02,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616452099] [2021-06-05 23:44:02,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:02,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:02,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616452099] [2021-06-05 23:44:02,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616452099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:02,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391525259] [2021-06-05 23:44:02,593 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 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 23:44:02,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:44:02,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:02,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:44:02,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:02,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:44:02,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:02,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:02,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:02,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:38 [2021-06-05 23:44:02,870 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:02,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 23:44:02,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:02,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:02,872 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 23:44:02,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-06-05 23:44:02,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:02,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:44:02,900 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:02,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:02,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:02,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:44:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:02,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391525259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:02,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:02,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:44:02,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480614161] [2021-06-05 23:44:02,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:44:02,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:02,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:44:02,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:44:02,953 INFO L87 Difference]: Start difference. First operand 37473 states and 155062 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:05,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:05,594 INFO L93 Difference]: Finished difference Result 69289 states and 282095 transitions. [2021-06-05 23:44:05,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:44:05,594 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:05,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:05,965 INFO L225 Difference]: With dead ends: 69289 [2021-06-05 23:44:05,966 INFO L226 Difference]: Without dead ends: 69125 [2021-06-05 23:44:05,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1686.3ms TimeCoverageRelationStatistics Valid=501, Invalid=2469, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:44:06,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69125 states. [2021-06-05 23:44:06,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69125 to 37795. [2021-06-05 23:44:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37795 states, 37794 states have (on average 4.137587976927555) internal successors, (156376), 37794 states have internal predecessors, (156376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:06,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37795 states to 37795 states and 156376 transitions. [2021-06-05 23:44:06,997 INFO L78 Accepts]: Start accepts. Automaton has 37795 states and 156376 transitions. Word has length 39 [2021-06-05 23:44:06,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:06,997 INFO L482 AbstractCegarLoop]: Abstraction has 37795 states and 156376 transitions. [2021-06-05 23:44:06,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:06,998 INFO L276 IsEmpty]: Start isEmpty. Operand 37795 states and 156376 transitions. [2021-06-05 23:44:07,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:07,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:07,063 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:07,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 23:44:07,264 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:07,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:07,264 INFO L82 PathProgramCache]: Analyzing trace with hash -941570975, now seen corresponding path program 37 times [2021-06-05 23:44:07,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:07,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773557666] [2021-06-05 23:44:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:07,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:07,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773557666] [2021-06-05 23:44:07,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773557666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:07,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100853026] [2021-06-05 23:44:07,576 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 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 23:44:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:07,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:44:07,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:07,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:44:07,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:07,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:07,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:07,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:44:07,847 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:07,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:44:07,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:07,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:07,850 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 23:44:07,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:44:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:07,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100853026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:07,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:07,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:44:07,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914115010] [2021-06-05 23:44:07,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:44:07,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:07,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:44:07,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:44:07,904 INFO L87 Difference]: Start difference. First operand 37795 states and 156376 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:09,084 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-06-05 23:44:10,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:10,031 INFO L93 Difference]: Finished difference Result 95424 states and 387343 transitions. [2021-06-05 23:44:10,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:44:10,031 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:10,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:10,303 INFO L225 Difference]: With dead ends: 95424 [2021-06-05 23:44:10,304 INFO L226 Difference]: Without dead ends: 95288 [2021-06-05 23:44:10,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1216.1ms TimeCoverageRelationStatistics Valid=385, Invalid=1871, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:44:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95288 states. [2021-06-05 23:44:11,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95288 to 37555. [2021-06-05 23:44:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37555 states, 37554 states have (on average 4.140970336049422) internal successors, (155510), 37554 states have internal predecessors, (155510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:11,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37555 states to 37555 states and 155510 transitions. [2021-06-05 23:44:11,881 INFO L78 Accepts]: Start accepts. Automaton has 37555 states and 155510 transitions. Word has length 39 [2021-06-05 23:44:11,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:11,881 INFO L482 AbstractCegarLoop]: Abstraction has 37555 states and 155510 transitions. [2021-06-05 23:44:11,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 37555 states and 155510 transitions. [2021-06-05 23:44:11,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:11,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:11,958 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:12,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:12,179 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:12,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:12,179 INFO L82 PathProgramCache]: Analyzing trace with hash -6081193, now seen corresponding path program 38 times [2021-06-05 23:44:12,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:12,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459342291] [2021-06-05 23:44:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:12,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:12,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459342291] [2021-06-05 23:44:12,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459342291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:12,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339551821] [2021-06-05 23:44:12,580 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 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 23:44:12,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:44:12,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:12,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:44:12,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:12,828 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:12,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 23:44:12,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:12,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:12,836 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 23:44:12,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 23:44:12,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:44:12,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:12,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:12,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:12,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:44:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:12,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339551821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:12,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:12,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:44:12,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465377711] [2021-06-05 23:44:12,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:44:12,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:12,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:44:12,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:44:12,938 INFO L87 Difference]: Start difference. First operand 37555 states and 155510 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:14,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:14,554 INFO L93 Difference]: Finished difference Result 64761 states and 264970 transitions. [2021-06-05 23:44:14,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:44:14,555 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:14,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:14,745 INFO L225 Difference]: With dead ends: 64761 [2021-06-05 23:44:14,745 INFO L226 Difference]: Without dead ends: 64569 [2021-06-05 23:44:14,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 987.0ms TimeCoverageRelationStatistics Valid=311, Invalid=1411, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:44:14,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64569 states. [2021-06-05 23:44:15,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64569 to 37579. [2021-06-05 23:44:15,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37579 states, 37578 states have (on average 4.1405609665229655) internal successors, (155594), 37578 states have internal predecessors, (155594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37579 states to 37579 states and 155594 transitions. [2021-06-05 23:44:15,722 INFO L78 Accepts]: Start accepts. Automaton has 37579 states and 155594 transitions. Word has length 39 [2021-06-05 23:44:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:15,722 INFO L482 AbstractCegarLoop]: Abstraction has 37579 states and 155594 transitions. [2021-06-05 23:44:15,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 37579 states and 155594 transitions. [2021-06-05 23:44:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:15,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:15,788 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:15,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 23:44:15,989 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:15,989 INFO L82 PathProgramCache]: Analyzing trace with hash 2143700845, now seen corresponding path program 39 times [2021-06-05 23:44:15,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:15,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869191914] [2021-06-05 23:44:15,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:16,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:16,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869191914] [2021-06-05 23:44:16,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869191914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:16,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406371422] [2021-06-05 23:44:16,318 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 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 23:44:16,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:44:16,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:16,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 23:44:16,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:16,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:16,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:16,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 23:44:16,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:16,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:16,671 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 23:44:16,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:109 [2021-06-05 23:44:16,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:16,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 23:44:16,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:16,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:16,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:16,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:40 [2021-06-05 23:44:16,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:16,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:44:16,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:16,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:16,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:44:16,875 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:16,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:16,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:16,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2021-06-05 23:44:16,880 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:16,934 INFO L628 ElimStorePlain]: treesize reduction 29, result has 68.5 percent of original size [2021-06-05 23:44:16,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:44:16,936 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:123, output treesize:54 [2021-06-05 23:44:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:17,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406371422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:17,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:17,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-05 23:44:17,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603544047] [2021-06-05 23:44:17,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:44:17,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:17,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:44:17,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:44:17,099 INFO L87 Difference]: Start difference. First operand 37579 states and 155594 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:18,063 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2021-06-05 23:44:20,139 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-06-05 23:44:21,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:21,022 INFO L93 Difference]: Finished difference Result 62542 states and 254035 transitions. [2021-06-05 23:44:21,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:44:21,023 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:21,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:21,190 INFO L225 Difference]: With dead ends: 62542 [2021-06-05 23:44:21,190 INFO L226 Difference]: Without dead ends: 62394 [2021-06-05 23:44:21,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 3145.0ms TimeCoverageRelationStatistics Valid=819, Invalid=4293, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:44:21,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62394 states. [2021-06-05 23:44:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62394 to 37873. [2021-06-05 23:44:21,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37873 states, 37872 states have (on average 4.136670891423743) internal successors, (156664), 37872 states have internal predecessors, (156664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:22,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37873 states to 37873 states and 156664 transitions. [2021-06-05 23:44:22,069 INFO L78 Accepts]: Start accepts. Automaton has 37873 states and 156664 transitions. Word has length 39 [2021-06-05 23:44:22,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:22,069 INFO L482 AbstractCegarLoop]: Abstraction has 37873 states and 156664 transitions. [2021-06-05 23:44:22,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:22,069 INFO L276 IsEmpty]: Start isEmpty. Operand 37873 states and 156664 transitions. [2021-06-05 23:44:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:22,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:22,135 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:22,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:22,335 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:22,336 INFO L82 PathProgramCache]: Analyzing trace with hash 461863935, now seen corresponding path program 40 times [2021-06-05 23:44:22,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:22,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048298178] [2021-06-05 23:44:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:22,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:22,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048298178] [2021-06-05 23:44:22,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048298178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:22,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848998200] [2021-06-05 23:44:22,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:44:22,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:44:22,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:22,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:44:22,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:22,919 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:22,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 23:44:22,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:22,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:22,926 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 23:44:22,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 23:44:22,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:44:22,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:22,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:22,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:22,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:44:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:22,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848998200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:22,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:22,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:44:23,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193598857] [2021-06-05 23:44:23,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:44:23,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:23,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:44:23,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:44:23,000 INFO L87 Difference]: Start difference. First operand 37873 states and 156664 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:24,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:24,743 INFO L93 Difference]: Finished difference Result 79867 states and 324316 transitions. [2021-06-05 23:44:24,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:44:24,743 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:24,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:24,963 INFO L225 Difference]: With dead ends: 79867 [2021-06-05 23:44:24,963 INFO L226 Difference]: Without dead ends: 79643 [2021-06-05 23:44:24,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1156.4ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:44:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79643 states. [2021-06-05 23:44:25,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79643 to 37765. [2021-06-05 23:44:26,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37765 states, 37764 states have (on average 4.138703527168732) internal successors, (156294), 37764 states have internal predecessors, (156294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37765 states to 37765 states and 156294 transitions. [2021-06-05 23:44:26,350 INFO L78 Accepts]: Start accepts. Automaton has 37765 states and 156294 transitions. Word has length 39 [2021-06-05 23:44:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:26,350 INFO L482 AbstractCegarLoop]: Abstraction has 37765 states and 156294 transitions. [2021-06-05 23:44:26,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:26,350 INFO L276 IsEmpty]: Start isEmpty. Operand 37765 states and 156294 transitions. [2021-06-05 23:44:26,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:26,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:26,431 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:26,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:26,631 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:26,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:26,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1820000131, now seen corresponding path program 41 times [2021-06-05 23:44:26,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:26,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091152360] [2021-06-05 23:44:26,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:26,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:26,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091152360] [2021-06-05 23:44:26,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091152360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:26,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835431130] [2021-06-05 23:44:26,945 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 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 23:44:26,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:44:26,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:26,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:44:26,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:27,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:44:27,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:27,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:27,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:27,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:47 [2021-06-05 23:44:27,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:27,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:27,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:27,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:27,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 23:44:27,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:44:27,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:27,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:27,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:28 [2021-06-05 23:44:27,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:27,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-06-05 23:44:27,414 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:27,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:27,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:27,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-06-05 23:44:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:27,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835431130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:27,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:27,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:44:27,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578782993] [2021-06-05 23:44:27,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:44:27,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:27,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:44:27,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:44:27,479 INFO L87 Difference]: Start difference. First operand 37765 states and 156294 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:29,007 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-06-05 23:44:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:30,927 INFO L93 Difference]: Finished difference Result 95063 states and 386453 transitions. [2021-06-05 23:44:30,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:44:30,928 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:31,193 INFO L225 Difference]: With dead ends: 95063 [2021-06-05 23:44:31,193 INFO L226 Difference]: Without dead ends: 94672 [2021-06-05 23:44:31,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 2344.2ms TimeCoverageRelationStatistics Valid=807, Invalid=4449, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:44:31,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94672 states. [2021-06-05 23:44:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94672 to 37931. [2021-06-05 23:44:32,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37931 states, 37930 states have (on average 4.138676509359346) internal successors, (156980), 37930 states have internal predecessors, (156980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37931 states to 37931 states and 156980 transitions. [2021-06-05 23:44:32,581 INFO L78 Accepts]: Start accepts. Automaton has 37931 states and 156980 transitions. Word has length 39 [2021-06-05 23:44:32,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:32,581 INFO L482 AbstractCegarLoop]: Abstraction has 37931 states and 156980 transitions. [2021-06-05 23:44:32,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:32,581 INFO L276 IsEmpty]: Start isEmpty. Operand 37931 states and 156980 transitions. [2021-06-05 23:44:32,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:32,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:32,645 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:32,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 23:44:32,845 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:32,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:32,846 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920877, now seen corresponding path program 42 times [2021-06-05 23:44:32,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:32,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473659298] [2021-06-05 23:44:32,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:33,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:33,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473659298] [2021-06-05 23:44:33,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473659298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:33,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190111027] [2021-06-05 23:44:33,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:44:33,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:44:33,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:33,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:44:33,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:33,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:44:33,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:33,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:33,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:33,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:38 [2021-06-05 23:44:33,478 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:33,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 23:44:33,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:33,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:33,480 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 23:44:33,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-06-05 23:44:33,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:33,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:44:33,511 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:33,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:33,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:33,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:44:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:33,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190111027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:33,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:33,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:44:33,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493474195] [2021-06-05 23:44:33,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:44:33,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:33,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:44:33,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:44:33,569 INFO L87 Difference]: Start difference. First operand 37931 states and 156980 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:34,786 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-05 23:44:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:35,925 INFO L93 Difference]: Finished difference Result 68287 states and 278156 transitions. [2021-06-05 23:44:35,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:44:35,926 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:35,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:36,111 INFO L225 Difference]: With dead ends: 68287 [2021-06-05 23:44:36,111 INFO L226 Difference]: Without dead ends: 68123 [2021-06-05 23:44:36,112 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1593.5ms TimeCoverageRelationStatistics Valid=510, Invalid=2246, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:44:36,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68123 states. [2021-06-05 23:44:37,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68123 to 37931. [2021-06-05 23:44:37,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37931 states, 37930 states have (on average 4.138676509359346) internal successors, (156980), 37930 states have internal predecessors, (156980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37931 states to 37931 states and 156980 transitions. [2021-06-05 23:44:37,151 INFO L78 Accepts]: Start accepts. Automaton has 37931 states and 156980 transitions. Word has length 39 [2021-06-05 23:44:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:37,151 INFO L482 AbstractCegarLoop]: Abstraction has 37931 states and 156980 transitions. [2021-06-05 23:44:37,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:37,152 INFO L276 IsEmpty]: Start isEmpty. Operand 37931 states and 156980 transitions. [2021-06-05 23:44:37,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:37,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:37,218 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:37,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:37,418 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:37,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:37,419 INFO L82 PathProgramCache]: Analyzing trace with hash 426158953, now seen corresponding path program 43 times [2021-06-05 23:44:37,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:37,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155743382] [2021-06-05 23:44:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:37,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:37,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155743382] [2021-06-05 23:44:37,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155743382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:37,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4096577] [2021-06-05 23:44:37,939 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 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 23:44:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:37,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:44:37,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:38,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:44:38,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:38,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:38,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:38,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:44:38,212 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:38,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:44:38,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:38,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:38,215 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 23:44:38,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:44:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:38,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4096577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:38,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:38,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:44:38,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190373245] [2021-06-05 23:44:38,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:44:38,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:38,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:44:38,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:44:38,256 INFO L87 Difference]: Start difference. First operand 37931 states and 156980 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:40,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:40,197 INFO L93 Difference]: Finished difference Result 95489 states and 387502 transitions. [2021-06-05 23:44:40,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:44:40,197 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:40,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:40,475 INFO L225 Difference]: With dead ends: 95489 [2021-06-05 23:44:40,475 INFO L226 Difference]: Without dead ends: 95369 [2021-06-05 23:44:40,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1270.7ms TimeCoverageRelationStatistics Valid=387, Invalid=1775, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:44:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95369 states. [2021-06-05 23:44:41,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95369 to 37595. [2021-06-05 23:44:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37595 states, 37594 states have (on average 4.140288343884662) internal successors, (155650), 37594 states have internal predecessors, (155650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37595 states to 37595 states and 155650 transitions. [2021-06-05 23:44:41,673 INFO L78 Accepts]: Start accepts. Automaton has 37595 states and 155650 transitions. Word has length 39 [2021-06-05 23:44:41,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:41,673 INFO L482 AbstractCegarLoop]: Abstraction has 37595 states and 155650 transitions. [2021-06-05 23:44:41,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:41,673 INFO L276 IsEmpty]: Start isEmpty. Operand 37595 states and 155650 transitions. [2021-06-05 23:44:41,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:41,737 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:41,737 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:41,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-06-05 23:44:41,938 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:41,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:41,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1034892989, now seen corresponding path program 44 times [2021-06-05 23:44:41,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:41,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081136417] [2021-06-05 23:44:41,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:42,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:42,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081136417] [2021-06-05 23:44:42,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081136417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:42,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786450327] [2021-06-05 23:44:42,205 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 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 23:44:42,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:44:42,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:42,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:44:42,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:42,390 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:42,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:44:42,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:42,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:42,398 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 23:44:42,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:44:42,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:44:42,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:42,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:42,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:42,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-06-05 23:44:42,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:42,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:44:42,515 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:42,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:42,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:42,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:44:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:42,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786450327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:42,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:42,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:44:42,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477174472] [2021-06-05 23:44:42,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:44:42,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:42,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:44:42,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:44:42,559 INFO L87 Difference]: Start difference. First operand 37595 states and 155650 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:44,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:44,276 INFO L93 Difference]: Finished difference Result 80474 states and 331550 transitions. [2021-06-05 23:44:44,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:44:44,276 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:44,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:44,506 INFO L225 Difference]: With dead ends: 80474 [2021-06-05 23:44:44,506 INFO L226 Difference]: Without dead ends: 80419 [2021-06-05 23:44:44,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1013.4ms TimeCoverageRelationStatistics Valid=352, Invalid=2098, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:44:44,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80419 states. [2021-06-05 23:44:45,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80419 to 37911. [2021-06-05 23:44:45,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37911 states, 37910 states have (on average 4.138406752835664) internal successors, (156887), 37910 states have internal predecessors, (156887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37911 states to 37911 states and 156887 transitions. [2021-06-05 23:44:45,646 INFO L78 Accepts]: Start accepts. Automaton has 37911 states and 156887 transitions. Word has length 39 [2021-06-05 23:44:45,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:45,646 INFO L482 AbstractCegarLoop]: Abstraction has 37911 states and 156887 transitions. [2021-06-05 23:44:45,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:45,646 INFO L276 IsEmpty]: Start isEmpty. Operand 37911 states and 156887 transitions. [2021-06-05 23:44:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:45,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:45,945 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:46,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:46,161 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:46,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:46,161 INFO L82 PathProgramCache]: Analyzing trace with hash 899626485, now seen corresponding path program 45 times [2021-06-05 23:44:46,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:46,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143896207] [2021-06-05 23:44:46,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:46,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:46,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143896207] [2021-06-05 23:44:46,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143896207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:46,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712902309] [2021-06-05 23:44:46,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:44:46,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:44:46,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:46,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:44:46,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:46,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:46,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:46,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 23:44:46,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:46,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:46,728 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 23:44:46,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:94 [2021-06-05 23:44:46,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:46,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 23:44:46,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:46,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:46,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:46,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:37 [2021-06-05 23:44:46,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:46,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:46,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2021-06-05 23:44:46,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:44:46,955 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 23:44:46,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 12 [2021-06-05 23:44:46,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:46,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:46,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:44:46,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:47,006 INFO L628 ElimStorePlain]: treesize reduction 36, result has 60.0 percent of original size [2021-06-05 23:44:47,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:44:47,007 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:111, output treesize:45 [2021-06-05 23:44:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:47,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712902309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:47,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:47,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:44:47,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212420392] [2021-06-05 23:44:47,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:44:47,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:47,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:44:47,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:44:47,131 INFO L87 Difference]: Start difference. First operand 37911 states and 156887 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:48,692 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-06-05 23:44:50,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:50,198 INFO L93 Difference]: Finished difference Result 73756 states and 299227 transitions. [2021-06-05 23:44:50,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:44:50,198 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:50,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:50,400 INFO L225 Difference]: With dead ends: 73756 [2021-06-05 23:44:50,400 INFO L226 Difference]: Without dead ends: 73592 [2021-06-05 23:44:50,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 2537.7ms TimeCoverageRelationStatistics Valid=917, Invalid=3373, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:44:50,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73592 states. [2021-06-05 23:44:51,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73592 to 38073. [2021-06-05 23:44:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38073 states, 38072 states have (on average 4.135874133221265) internal successors, (157461), 38072 states have internal predecessors, (157461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38073 states to 38073 states and 157461 transitions. [2021-06-05 23:44:51,401 INFO L78 Accepts]: Start accepts. Automaton has 38073 states and 157461 transitions. Word has length 39 [2021-06-05 23:44:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:51,402 INFO L482 AbstractCegarLoop]: Abstraction has 38073 states and 157461 transitions. [2021-06-05 23:44:51,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:51,402 INFO L276 IsEmpty]: Start isEmpty. Operand 38073 states and 157461 transitions. [2021-06-05 23:44:51,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:51,466 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:51,466 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:51,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 23:44:51,666 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:51,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:51,667 INFO L82 PathProgramCache]: Analyzing trace with hash -782210425, now seen corresponding path program 46 times [2021-06-05 23:44:51,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:51,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221232467] [2021-06-05 23:44:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:52,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:52,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221232467] [2021-06-05 23:44:52,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221232467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:52,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913777225] [2021-06-05 23:44:52,122 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 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 23:44:52,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:44:52,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:52,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:44:52,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:52,315 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:52,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:44:52,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:52,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:52,322 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 23:44:52,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:44:52,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:44:52,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:52,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:52,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:52,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:44:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:52,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913777225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:52,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:52,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:44:52,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577244197] [2021-06-05 23:44:52,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:44:52,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:52,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:44:52,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:44:52,451 INFO L87 Difference]: Start difference. First operand 38073 states and 157461 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:54,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:54,516 INFO L93 Difference]: Finished difference Result 80373 states and 326640 transitions. [2021-06-05 23:44:54,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:44:54,517 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:54,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:54,755 INFO L225 Difference]: With dead ends: 80373 [2021-06-05 23:44:54,755 INFO L226 Difference]: Without dead ends: 80181 [2021-06-05 23:44:54,756 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1344.4ms TimeCoverageRelationStatistics Valid=428, Invalid=2122, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:44:54,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80181 states. [2021-06-05 23:44:55,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80181 to 37761. [2021-06-05 23:44:55,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37761 states, 37760 states have (on average 4.13927436440678) internal successors, (156299), 37760 states have internal predecessors, (156299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37761 states to 37761 states and 156299 transitions. [2021-06-05 23:44:55,824 INFO L78 Accepts]: Start accepts. Automaton has 37761 states and 156299 transitions. Word has length 39 [2021-06-05 23:44:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:55,824 INFO L482 AbstractCegarLoop]: Abstraction has 37761 states and 156299 transitions. [2021-06-05 23:44:55,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 37761 states and 156299 transitions. [2021-06-05 23:44:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:55,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:55,889 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:56,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 23:44:56,090 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:56,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:56,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1502735341, now seen corresponding path program 47 times [2021-06-05 23:44:56,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:56,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864184646] [2021-06-05 23:44:56,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:56,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:56,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864184646] [2021-06-05 23:44:56,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864184646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:56,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49636193] [2021-06-05 23:44:56,415 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 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 23:44:56,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:44:56,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:56,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:44:56,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:56,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:56,688 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 23:44:56,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:56,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:56,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:56,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:42 [2021-06-05 23:44:56,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:56,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:56,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:44:56,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:56,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:56,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:56,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:27 [2021-06-05 23:44:57,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:57,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:57,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:57,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:57,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 23:44:57,016 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:57,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:57,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:57,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 23:44:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:57,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49636193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:57,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:57,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:44:57,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531129497] [2021-06-05 23:44:57,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:44:57,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:57,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:44:57,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:44:57,093 INFO L87 Difference]: Start difference. First operand 37761 states and 156299 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:01,423 INFO L93 Difference]: Finished difference Result 74525 states and 304283 transitions. [2021-06-05 23:45:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 23:45:01,424 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:01,639 INFO L225 Difference]: With dead ends: 74525 [2021-06-05 23:45:01,639 INFO L226 Difference]: Without dead ends: 74304 [2021-06-05 23:45:01,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 2700.8ms TimeCoverageRelationStatistics Valid=818, Invalid=4584, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 23:45:01,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74304 states. [2021-06-05 23:45:02,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74304 to 38114. [2021-06-05 23:45:02,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38114 states, 38113 states have (on average 4.135518064702333) internal successors, (157617), 38113 states have internal predecessors, (157617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38114 states to 38114 states and 157617 transitions. [2021-06-05 23:45:02,678 INFO L78 Accepts]: Start accepts. Automaton has 38114 states and 157617 transitions. Word has length 39 [2021-06-05 23:45:02,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:02,678 INFO L482 AbstractCegarLoop]: Abstraction has 38114 states and 157617 transitions. [2021-06-05 23:45:02,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 38114 states and 157617 transitions. [2021-06-05 23:45:02,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:02,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:02,744 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:02,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:02,944 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:02,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:02,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1311781951, now seen corresponding path program 48 times [2021-06-05 23:45:02,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:02,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620064153] [2021-06-05 23:45:02,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:03,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:03,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620064153] [2021-06-05 23:45:03,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620064153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:03,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640572228] [2021-06-05 23:45:03,264 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 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 23:45:03,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:45:03,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:03,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:45:03,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:03,451 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:45:03,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:45:03,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:03,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:03,458 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 23:45:03,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:45:03,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:45:03,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:03,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:03,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:03,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:45:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:03,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640572228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:03,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:03,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:45:03,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391861129] [2021-06-05 23:45:03,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:45:03,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:03,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:45:03,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:45:03,591 INFO L87 Difference]: Start difference. First operand 38114 states and 157617 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:04,428 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-06-05 23:45:05,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:05,375 INFO L93 Difference]: Finished difference Result 80215 states and 325882 transitions. [2021-06-05 23:45:05,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:45:05,375 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:05,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:05,603 INFO L225 Difference]: With dead ends: 80215 [2021-06-05 23:45:05,603 INFO L226 Difference]: Without dead ends: 80031 [2021-06-05 23:45:05,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1306.4ms TimeCoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:45:05,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80031 states. [2021-06-05 23:45:06,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80031 to 37852. [2021-06-05 23:45:06,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37852 states, 37851 states have (on average 4.138754590367493) internal successors, (156656), 37851 states have internal predecessors, (156656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:06,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37852 states to 37852 states and 156656 transitions. [2021-06-05 23:45:06,749 INFO L78 Accepts]: Start accepts. Automaton has 37852 states and 156656 transitions. Word has length 39 [2021-06-05 23:45:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:06,750 INFO L482 AbstractCegarLoop]: Abstraction has 37852 states and 156656 transitions. [2021-06-05 23:45:06,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:06,750 INFO L276 IsEmpty]: Start isEmpty. Operand 37852 states and 156656 transitions. [2021-06-05 23:45:06,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:06,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:06,816 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:07,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 23:45:07,016 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:07,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:07,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1564579539, now seen corresponding path program 49 times [2021-06-05 23:45:07,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:07,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511167778] [2021-06-05 23:45:07,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:07,451 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 23:45:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:07,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:07,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511167778] [2021-06-05 23:45:07,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511167778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:07,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315149537] [2021-06-05 23:45:07,491 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 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 23:45:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:07,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:45:07,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:07,728 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:45:07,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:45:07,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:07,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:07,736 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 23:45:07,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:45:07,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:45:07,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:07,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:07,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:07,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 23:45:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:07,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315149537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:07,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:07,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 23:45:07,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082311063] [2021-06-05 23:45:07,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:45:07,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:07,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:45:07,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:45:07,818 INFO L87 Difference]: Start difference. First operand 37852 states and 156656 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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 23:45:09,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:09,058 INFO L93 Difference]: Finished difference Result 73140 states and 300824 transitions. [2021-06-05 23:45:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:45:09,059 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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) Word has length 39 [2021-06-05 23:45:09,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:09,278 INFO L225 Difference]: With dead ends: 73140 [2021-06-05 23:45:09,278 INFO L226 Difference]: Without dead ends: 73085 [2021-06-05 23:45:09,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 845.5ms TimeCoverageRelationStatistics Valid=239, Invalid=1321, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:45:09,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73085 states. [2021-06-05 23:45:10,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73085 to 38148. [2021-06-05 23:45:10,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38148 states, 38147 states have (on average 4.139145935460194) internal successors, (157896), 38147 states have internal predecessors, (157896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:10,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38148 states to 38148 states and 157896 transitions. [2021-06-05 23:45:10,563 INFO L78 Accepts]: Start accepts. Automaton has 38148 states and 157896 transitions. Word has length 39 [2021-06-05 23:45:10,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:10,563 INFO L482 AbstractCegarLoop]: Abstraction has 38148 states and 157896 transitions. [2021-06-05 23:45:10,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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 23:45:10,564 INFO L276 IsEmpty]: Start isEmpty. Operand 38148 states and 157896 transitions. [2021-06-05 23:45:10,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:10,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:10,645 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:10,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:10,846 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:10,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:10,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1913331931, now seen corresponding path program 50 times [2021-06-05 23:45:10,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:10,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935562048] [2021-06-05 23:45:10,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:11,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:11,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935562048] [2021-06-05 23:45:11,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935562048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:11,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315376402] [2021-06-05 23:45:11,131 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 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 23:45:11,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:45:11,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:11,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:45:11,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:11,330 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:45:11,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:45:11,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:11,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:11,337 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 23:45:11,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:45:11,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:45:11,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:11,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:11,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:11,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:45:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:11,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315376402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:11,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:11,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:45:11,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757659117] [2021-06-05 23:45:11,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:45:11,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:11,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:45:11,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:45:11,438 INFO L87 Difference]: Start difference. First operand 38148 states and 157896 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:13,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:13,006 INFO L93 Difference]: Finished difference Result 66535 states and 272055 transitions. [2021-06-05 23:45:13,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:45:13,007 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:13,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:13,186 INFO L225 Difference]: With dead ends: 66535 [2021-06-05 23:45:13,186 INFO L226 Difference]: Without dead ends: 66319 [2021-06-05 23:45:13,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1021.8ms TimeCoverageRelationStatistics Valid=355, Invalid=1715, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:45:13,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66319 states. [2021-06-05 23:45:14,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66319 to 37929. [2021-06-05 23:45:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37929 states, 37928 states have (on average 4.138868382197849) internal successors, (156979), 37928 states have internal predecessors, (156979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37929 states to 37929 states and 156979 transitions. [2021-06-05 23:45:14,239 INFO L78 Accepts]: Start accepts. Automaton has 37929 states and 156979 transitions. Word has length 39 [2021-06-05 23:45:14,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:14,239 INFO L482 AbstractCegarLoop]: Abstraction has 37929 states and 156979 transitions. [2021-06-05 23:45:14,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:14,239 INFO L276 IsEmpty]: Start isEmpty. Operand 37929 states and 156979 transitions. [2021-06-05 23:45:14,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:14,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:14,308 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:14,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:14,511 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:14,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1573156905, now seen corresponding path program 51 times [2021-06-05 23:45:14,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:14,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129519426] [2021-06-05 23:45:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:14,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:14,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129519426] [2021-06-05 23:45:14,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129519426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:14,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657226036] [2021-06-05 23:45:14,760 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 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 23:45:14,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:45:14,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:14,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:45:14,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:14,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:45:14,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:14,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:14,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:14,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:32 [2021-06-05 23:45:14,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:15,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:15,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2021-06-05 23:45:15,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:15,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:15,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:45:15,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:83 [2021-06-05 23:45:15,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:15,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:45:15,105 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:15,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:15,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:15,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:45:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:15,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657226036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:15,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:15,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:45:15,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636712053] [2021-06-05 23:45:15,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:45:15,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:15,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:45:15,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:45:15,150 INFO L87 Difference]: Start difference. First operand 37929 states and 156979 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:17,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:17,778 INFO L93 Difference]: Finished difference Result 70813 states and 289318 transitions. [2021-06-05 23:45:17,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:45:17,779 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:17,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:17,982 INFO L225 Difference]: With dead ends: 70813 [2021-06-05 23:45:17,982 INFO L226 Difference]: Without dead ends: 70758 [2021-06-05 23:45:17,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 1736.3ms TimeCoverageRelationStatistics Valid=521, Invalid=3511, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:45:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70758 states. [2021-06-05 23:45:18,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70758 to 38528. [2021-06-05 23:45:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38528 states, 38527 states have (on average 4.142341734368105) internal successors, (159592), 38527 states have internal predecessors, (159592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:19,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38528 states to 38528 states and 159592 transitions. [2021-06-05 23:45:19,038 INFO L78 Accepts]: Start accepts. Automaton has 38528 states and 159592 transitions. Word has length 39 [2021-06-05 23:45:19,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:19,038 INFO L482 AbstractCegarLoop]: Abstraction has 38528 states and 159592 transitions. [2021-06-05 23:45:19,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:19,038 INFO L276 IsEmpty]: Start isEmpty. Operand 38528 states and 159592 transitions. [2021-06-05 23:45:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:19,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:19,107 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:19,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:19,307 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:19,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1254976421, now seen corresponding path program 52 times [2021-06-05 23:45:19,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:19,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560030560] [2021-06-05 23:45:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:19,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:19,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560030560] [2021-06-05 23:45:19,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560030560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:19,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378299829] [2021-06-05 23:45:19,557 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 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 23:45:19,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:45:19,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:19,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:45:19,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:19,871 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-06-05 23:45:19,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:45:19,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:19,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:19,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:19,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:45:20,003 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:45:20,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 23:45:20,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:20,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:20,005 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 23:45:20,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 23:45:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:20,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378299829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:20,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:20,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:45:20,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473424413] [2021-06-05 23:45:20,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:45:20,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:20,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:45:20,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:45:20,066 INFO L87 Difference]: Start difference. First operand 38528 states and 159592 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:21,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:21,636 INFO L93 Difference]: Finished difference Result 94804 states and 386746 transitions. [2021-06-05 23:45:21,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:45:21,637 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:21,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:22,148 INFO L225 Difference]: With dead ends: 94804 [2021-06-05 23:45:22,149 INFO L226 Difference]: Without dead ends: 94749 [2021-06-05 23:45:22,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1183.2ms TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:45:22,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94749 states. [2021-06-05 23:45:23,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94749 to 38365. [2021-06-05 23:45:23,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38365 states, 38364 states have (on average 4.141825669898863) internal successors, (158897), 38364 states have internal predecessors, (158897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38365 states to 38365 states and 158897 transitions. [2021-06-05 23:45:23,444 INFO L78 Accepts]: Start accepts. Automaton has 38365 states and 158897 transitions. Word has length 39 [2021-06-05 23:45:23,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:23,444 INFO L482 AbstractCegarLoop]: Abstraction has 38365 states and 158897 transitions. [2021-06-05 23:45:23,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:23,444 INFO L276 IsEmpty]: Start isEmpty. Operand 38365 states and 158897 transitions. [2021-06-05 23:45:23,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:23,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:23,510 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:23,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 23:45:23,713 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:23,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:23,713 INFO L82 PathProgramCache]: Analyzing trace with hash 935568875, now seen corresponding path program 53 times [2021-06-05 23:45:23,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:23,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172259474] [2021-06-05 23:45:23,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:23,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:23,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172259474] [2021-06-05 23:45:23,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172259474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:23,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154526897] [2021-06-05 23:45:23,950 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 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 23:45:23,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:45:23,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:23,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:45:23,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:24,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:24,239 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-05 23:45:24,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:24,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:24,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:24,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:189 [2021-06-05 23:45:24,831 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 23:45:25,860 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-06-05 23:45:25,964 INFO L446 ElimStorePlain]: Different costs {1=[q1, v_prenex_107, v_prenex_96, v_prenex_101, v_prenex_99, v_prenex_103, v_prenex_104, v_prenex_106], 3=[v_prenex_98, v_prenex_97, v_prenex_100, v_prenex_102, v_prenex_105]} [2021-06-05 23:45:25,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:25,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 23:45:25,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:45:26,221 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-05 23:45:26,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:26,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:26,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 23:45:26,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:45:26,458 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 23:45:26,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:26,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:26,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 23:45:26,474 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:26,689 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 23:45:26,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:26,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:26,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 23:45:26,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:26,947 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-06-05 23:45:26,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:26,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:26,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 23:45:26,963 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 23:45:27,178 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-05 23:45:27,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:27,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:27,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 23:45:27,194 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 23:45:27,407 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-05 23:45:27,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:27,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:27,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 23:45:27,423 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 23:45:27,731 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-06-05 23:45:27,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:27,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:27,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 23:45:27,745 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 23:45:27,953 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 23:45:27,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:27,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:27,975 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 23:45:27,976 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:28,181 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-05 23:45:28,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:28,206 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 23:45:28,207 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 23:45:28,208 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:28,614 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2021-06-05 23:45:28,615 INFO L628 ElimStorePlain]: treesize reduction 20, result has 97.0 percent of original size [2021-06-05 23:45:28,640 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 23:45:28,640 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 23:45:28,642 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:29,033 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 127 [2021-06-05 23:45:29,033 INFO L628 ElimStorePlain]: treesize reduction 20, result has 96.9 percent of original size [2021-06-05 23:45:29,056 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 23:45:29,057 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 48 [2021-06-05 23:45:29,058 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:29,427 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 114 [2021-06-05 23:45:29,427 INFO L628 ElimStorePlain]: treesize reduction 28, result has 95.4 percent of original size [2021-06-05 23:45:29,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:29,447 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 23:45:29,448 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:29,635 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 23:45:29,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:29,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 13 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 23:45:29,663 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 27 variables, input treesize:739, output treesize:422 [2021-06-05 23:45:29,812 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 23:45:29,970 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:45:29,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 5 [2021-06-05 23:45:29,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:30,008 INFO L628 ElimStorePlain]: treesize reduction 32, result has 62.8 percent of original size [2021-06-05 23:45:30,011 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:45:30,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 9 [2021-06-05 23:45:30,013 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:30,024 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-06-05 23:45:30,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:30,024 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:97, output treesize:13 [2021-06-05 23:45:30,068 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 23:45:30,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154526897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:30,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:30,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:45:30,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136570962] [2021-06-05 23:45:30,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:45:30,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:30,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:45:30,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:45:30,069 INFO L87 Difference]: Start difference. First operand 38365 states and 158897 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:30,907 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-05 23:45:31,507 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2021-06-05 23:45:31,875 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2021-06-05 23:45:32,122 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2021-06-05 23:45:32,517 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 23:45:32,773 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-06-05 23:45:33,069 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 51 [2021-06-05 23:45:34,060 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-05 23:45:34,426 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 23:45:35,013 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-06-05 23:45:35,219 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 23:45:35,623 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-05 23:45:35,804 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-06-05 23:45:36,180 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-05 23:45:36,558 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-06-05 23:45:36,824 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 23:45:37,103 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-06-05 23:45:37,304 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2021-06-05 23:45:37,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:37,713 INFO L93 Difference]: Finished difference Result 83581 states and 341899 transitions. [2021-06-05 23:45:37,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 23:45:37,713 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:37,954 INFO L225 Difference]: With dead ends: 83581 [2021-06-05 23:45:37,954 INFO L226 Difference]: Without dead ends: 83487 [2021-06-05 23:45:37,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 6653.5ms TimeCoverageRelationStatistics Valid=766, Invalid=5396, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:45:38,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83487 states. [2021-06-05 23:45:38,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83487 to 38825. [2021-06-05 23:45:38,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38825 states, 38824 states have (on average 4.141330105089636) internal successors, (160783), 38824 states have internal predecessors, (160783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38825 states to 38825 states and 160783 transitions. [2021-06-05 23:45:39,070 INFO L78 Accepts]: Start accepts. Automaton has 38825 states and 160783 transitions. Word has length 39 [2021-06-05 23:45:39,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:39,071 INFO L482 AbstractCegarLoop]: Abstraction has 38825 states and 160783 transitions. [2021-06-05 23:45:39,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:39,071 INFO L276 IsEmpty]: Start isEmpty. Operand 38825 states and 160783 transitions. [2021-06-05 23:45:39,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:39,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:39,138 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:39,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:39,341 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:39,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:39,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1940405397, now seen corresponding path program 54 times [2021-06-05 23:45:39,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:39,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251810842] [2021-06-05 23:45:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:39,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:39,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251810842] [2021-06-05 23:45:39,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251810842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:39,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547467307] [2021-06-05 23:45:39,587 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 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 23:45:39,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:45:39,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:39,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 23:45:39,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:39,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:45:39,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:39,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:39,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:39,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:45:39,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:39,891 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 23:45:39,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:39,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:39,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:39,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:23 [2021-06-05 23:45:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:39,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547467307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:39,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:39,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:45:39,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441142213] [2021-06-05 23:45:39,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:45:39,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:39,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:45:39,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:45:39,978 INFO L87 Difference]: Start difference. First operand 38825 states and 160783 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:43,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:43,199 INFO L93 Difference]: Finished difference Result 120157 states and 497782 transitions. [2021-06-05 23:45:43,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:45:43,199 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:43,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:43,564 INFO L225 Difference]: With dead ends: 120157 [2021-06-05 23:45:43,564 INFO L226 Difference]: Without dead ends: 120102 [2021-06-05 23:45:43,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 1772.3ms TimeCoverageRelationStatistics Valid=468, Invalid=3072, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:45:43,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120102 states. [2021-06-05 23:45:44,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120102 to 39183. [2021-06-05 23:45:44,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39183 states, 39182 states have (on average 4.145551528763208) internal successors, (162431), 39182 states have internal predecessors, (162431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:45,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39183 states to 39183 states and 162431 transitions. [2021-06-05 23:45:45,054 INFO L78 Accepts]: Start accepts. Automaton has 39183 states and 162431 transitions. Word has length 39 [2021-06-05 23:45:45,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:45,054 INFO L482 AbstractCegarLoop]: Abstraction has 39183 states and 162431 transitions. [2021-06-05 23:45:45,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:45,055 INFO L276 IsEmpty]: Start isEmpty. Operand 39183 states and 162431 transitions. [2021-06-05 23:45:45,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:45,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:45,123 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:45,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 23:45:45,323 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:45,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:45,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1544758757, now seen corresponding path program 55 times [2021-06-05 23:45:45,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:45,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875620504] [2021-06-05 23:45:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:45,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:45,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875620504] [2021-06-05 23:45:45,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875620504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:45,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154841933] [2021-06-05 23:45:45,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:45:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:45,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:45:45,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:45,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:45:45,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:45,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:45,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:45,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:45:45,837 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:45:45,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:45:45,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:45,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:45,839 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 23:45:45,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:45:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:45,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154841933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:45,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:45,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:45:45,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404561246] [2021-06-05 23:45:45,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:45:45,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:45,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:45:45,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:45:45,879 INFO L87 Difference]: Start difference. First operand 39183 states and 162431 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:46,606 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-06-05 23:45:47,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:47,979 INFO L93 Difference]: Finished difference Result 115227 states and 467653 transitions. [2021-06-05 23:45:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:45:47,980 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:48,619 INFO L225 Difference]: With dead ends: 115227 [2021-06-05 23:45:48,619 INFO L226 Difference]: Without dead ends: 115172 [2021-06-05 23:45:48,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1295.8ms TimeCoverageRelationStatistics Valid=440, Invalid=1912, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:45:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115172 states. [2021-06-05 23:45:49,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115172 to 38763. [2021-06-05 23:45:49,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38763 states, 38762 states have (on average 4.147644600381817) internal successors, (160771), 38762 states have internal predecessors, (160771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38763 states to 38763 states and 160771 transitions. [2021-06-05 23:45:49,994 INFO L78 Accepts]: Start accepts. Automaton has 38763 states and 160771 transitions. Word has length 39 [2021-06-05 23:45:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:49,994 INFO L482 AbstractCegarLoop]: Abstraction has 38763 states and 160771 transitions. [2021-06-05 23:45:49,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:49,994 INFO L276 IsEmpty]: Start isEmpty. Operand 38763 states and 160771 transitions. [2021-06-05 23:45:50,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:50,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:50,063 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:50,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 23:45:50,264 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:50,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:50,264 INFO L82 PathProgramCache]: Analyzing trace with hash -463391085, now seen corresponding path program 56 times [2021-06-05 23:45:50,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:50,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880448297] [2021-06-05 23:45:50,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:50,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:50,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880448297] [2021-06-05 23:45:50,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880448297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:50,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594795512] [2021-06-05 23:45:50,594 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 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 23:45:50,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:45:50,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:50,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:45:50,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:50,848 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:45:50,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 23:45:50,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:50,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:50,856 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 23:45:50,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 23:45:50,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:45:50,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:50,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:50,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:50,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:45:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:50,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594795512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:50,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:50,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:45:50,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939766058] [2021-06-05 23:45:50,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:45:50,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:50,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:45:50,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:45:50,935 INFO L87 Difference]: Start difference. First operand 38763 states and 160771 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:52,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:52,588 INFO L93 Difference]: Finished difference Result 67529 states and 276217 transitions. [2021-06-05 23:45:52,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:45:52,589 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:52,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:52,775 INFO L225 Difference]: With dead ends: 67529 [2021-06-05 23:45:52,775 INFO L226 Difference]: Without dead ends: 67281 [2021-06-05 23:45:52,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1228.5ms TimeCoverageRelationStatistics Valid=335, Invalid=1471, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:45:52,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67281 states. [2021-06-05 23:45:53,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67281 to 38949. [2021-06-05 23:45:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38949 states, 38948 states have (on average 4.1458097976789565) internal successors, (161471), 38948 states have internal predecessors, (161471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:53,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38949 states to 38949 states and 161471 transitions. [2021-06-05 23:45:53,881 INFO L78 Accepts]: Start accepts. Automaton has 38949 states and 161471 transitions. Word has length 39 [2021-06-05 23:45:53,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:53,881 INFO L482 AbstractCegarLoop]: Abstraction has 38949 states and 161471 transitions. [2021-06-05 23:45:53,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:53,882 INFO L276 IsEmpty]: Start isEmpty. Operand 38949 states and 161471 transitions. [2021-06-05 23:45:53,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:53,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:53,949 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:54,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:54,149 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:54,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1553694967, now seen corresponding path program 57 times [2021-06-05 23:45:54,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:54,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131120057] [2021-06-05 23:45:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:54,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:54,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131120057] [2021-06-05 23:45:54,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131120057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:54,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137308566] [2021-06-05 23:45:54,449 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 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 23:45:54,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:45:54,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:54,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:45:54,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:54,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:45:54,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:54,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:54,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:54,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:38 [2021-06-05 23:45:54,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:54,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:54,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 23:45:54,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:54,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:54,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:45:54,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:73 [2021-06-05 23:45:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:54,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137308566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:54,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:54,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:45:54,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480072834] [2021-06-05 23:45:54,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:45:54,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:54,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:45:54,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:45:54,825 INFO L87 Difference]: Start difference. First operand 38949 states and 161471 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:55,528 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-06-05 23:45:57,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:57,893 INFO L93 Difference]: Finished difference Result 84891 states and 344726 transitions. [2021-06-05 23:45:57,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:45:57,894 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:57,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:58,133 INFO L225 Difference]: With dead ends: 84891 [2021-06-05 23:45:58,133 INFO L226 Difference]: Without dead ends: 84677 [2021-06-05 23:45:58,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 2056.7ms TimeCoverageRelationStatistics Valid=670, Invalid=3490, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:45:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84677 states. [2021-06-05 23:45:59,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84677 to 39215. [2021-06-05 23:45:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39215 states, 39214 states have (on average 4.1454327536084055) internal successors, (162559), 39214 states have internal predecessors, (162559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39215 states to 39215 states and 162559 transitions. [2021-06-05 23:45:59,333 INFO L78 Accepts]: Start accepts. Automaton has 39215 states and 162559 transitions. Word has length 39 [2021-06-05 23:45:59,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:59,333 INFO L482 AbstractCegarLoop]: Abstraction has 39215 states and 162559 transitions. [2021-06-05 23:45:59,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:59,334 INFO L276 IsEmpty]: Start isEmpty. Operand 39215 states and 162559 transitions. [2021-06-05 23:45:59,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:59,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:59,402 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:59,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-05 23:45:59,602 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:59,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:59,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1757615713, now seen corresponding path program 58 times [2021-06-05 23:45:59,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:59,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033238758] [2021-06-05 23:45:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:59,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:59,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:59,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033238758] [2021-06-05 23:45:59,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033238758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:59,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399560142] [2021-06-05 23:45:59,894 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 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 23:45:59,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:45:59,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:59,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:45:59,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:00,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:46:00,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:00,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:00,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:00,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:46:00,160 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:46:00,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:46:00,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:00,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:00,162 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 23:46:00,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:46:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:00,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399560142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:00,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:00,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:46:00,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544857230] [2021-06-05 23:46:00,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:46:00,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:00,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:46:00,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:46:00,203 INFO L87 Difference]: Start difference. First operand 39215 states and 162559 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:01,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:01,777 INFO L93 Difference]: Finished difference Result 72133 states and 294870 transitions. [2021-06-05 23:46:01,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:46:01,777 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:01,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:01,978 INFO L225 Difference]: With dead ends: 72133 [2021-06-05 23:46:01,978 INFO L226 Difference]: Without dead ends: 72043 [2021-06-05 23:46:01,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 902.7ms TimeCoverageRelationStatistics Valid=315, Invalid=1407, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:46:02,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72043 states. [2021-06-05 23:46:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72043 to 39305. [2021-06-05 23:46:03,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39305 states, 39304 states have (on average 4.14576124567474) internal successors, (162945), 39304 states have internal predecessors, (162945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39305 states to 39305 states and 162945 transitions. [2021-06-05 23:46:03,145 INFO L78 Accepts]: Start accepts. Automaton has 39305 states and 162945 transitions. Word has length 39 [2021-06-05 23:46:03,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:03,145 INFO L482 AbstractCegarLoop]: Abstraction has 39305 states and 162945 transitions. [2021-06-05 23:46:03,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:03,145 INFO L276 IsEmpty]: Start isEmpty. Operand 39305 states and 162945 transitions. [2021-06-05 23:46:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:03,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:03,219 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:03,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 23:46:03,435 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:03,436 INFO L82 PathProgramCache]: Analyzing trace with hash 159853789, now seen corresponding path program 59 times [2021-06-05 23:46:03,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:03,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977195527] [2021-06-05 23:46:03,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:03,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:03,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977195527] [2021-06-05 23:46:03,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977195527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:03,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322924888] [2021-06-05 23:46:03,742 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 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 23:46:03,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:46:03,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:03,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 23:46:03,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:04,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:04,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 23:46:04,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:04,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:04,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:46:04,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:74 [2021-06-05 23:46:06,337 INFO L446 ElimStorePlain]: Different costs {3=[q1], 6=[v_prenex_110, v_prenex_112]} [2021-06-05 23:46:06,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:06,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:06,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2021-06-05 23:46:06,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:06,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:06,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:06,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:06,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:06,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:06,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-06-05 23:46:06,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:46:06,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:06,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:06,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:06,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:06,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:06,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 55 [2021-06-05 23:46:06,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 23:46:06,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:06,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 23:46:06,544 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:185, output treesize:101 [2021-06-05 23:46:06,971 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_114], 6=[q2]} [2021-06-05 23:46:06,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:06,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:06,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 32 [2021-06-05 23:46:06,988 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:07,060 INFO L628 ElimStorePlain]: treesize reduction 13, result has 88.8 percent of original size [2021-06-05 23:46:07,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:07,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:07,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:07,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:07,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 23:46:07,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:46:07,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:07,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:46:07,116 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:135, output treesize:71 [2021-06-05 23:46:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:07,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322924888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:07,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:07,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:46:07,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352969988] [2021-06-05 23:46:07,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:46:07,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:07,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:46:07,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=851, Unknown=1, NotChecked=0, Total=992 [2021-06-05 23:46:07,245 INFO L87 Difference]: Start difference. First operand 39305 states and 162945 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:09,676 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-05 23:46:11,405 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 93 [2021-06-05 23:46:13,037 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2021-06-05 23:46:15,566 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2021-06-05 23:46:16,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:16,779 INFO L93 Difference]: Finished difference Result 108227 states and 436846 transitions. [2021-06-05 23:46:16,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 23:46:16,779 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:16,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:17,110 INFO L225 Difference]: With dead ends: 108227 [2021-06-05 23:46:17,110 INFO L226 Difference]: Without dead ends: 107921 [2021-06-05 23:46:17,112 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5695 ImplicationChecksByTransitivity, 9601.8ms TimeCoverageRelationStatistics Valid=2690, Invalid=13565, Unknown=1, NotChecked=0, Total=16256 [2021-06-05 23:46:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107921 states. [2021-06-05 23:46:18,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107921 to 38777. [2021-06-05 23:46:18,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38777 states, 38776 states have (on average 4.148983907571694) internal successors, (160881), 38776 states have internal predecessors, (160881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:18,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38777 states to 38777 states and 160881 transitions. [2021-06-05 23:46:18,507 INFO L78 Accepts]: Start accepts. Automaton has 38777 states and 160881 transitions. Word has length 39 [2021-06-05 23:46:18,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:18,507 INFO L482 AbstractCegarLoop]: Abstraction has 38777 states and 160881 transitions. [2021-06-05 23:46:18,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:18,507 INFO L276 IsEmpty]: Start isEmpty. Operand 38777 states and 160881 transitions. [2021-06-05 23:46:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:18,575 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:18,575 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:18,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 23:46:18,776 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:18,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:18,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1095343571, now seen corresponding path program 60 times [2021-06-05 23:46:18,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:18,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131444004] [2021-06-05 23:46:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:19,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:19,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131444004] [2021-06-05 23:46:19,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131444004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:19,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825487041] [2021-06-05 23:46:19,104 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 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 23:46:19,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:46:19,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:19,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:46:19,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:19,319 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:46:19,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 23:46:19,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:19,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:19,326 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 23:46:19,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 23:46:19,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:46:19,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:19,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:19,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:19,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:46:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:19,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825487041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:19,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:19,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:46:19,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186973748] [2021-06-05 23:46:19,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:46:19,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:19,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:46:19,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:46:19,428 INFO L87 Difference]: Start difference. First operand 38777 states and 160881 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:21,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:21,136 INFO L93 Difference]: Finished difference Result 66476 states and 272243 transitions. [2021-06-05 23:46:21,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:46:21,136 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:21,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:21,322 INFO L225 Difference]: With dead ends: 66476 [2021-06-05 23:46:21,322 INFO L226 Difference]: Without dead ends: 66284 [2021-06-05 23:46:21,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 989.4ms TimeCoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:46:21,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66284 states. [2021-06-05 23:46:22,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66284 to 38801. [2021-06-05 23:46:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38801 states, 38800 states have (on average 4.148582474226804) internal successors, (160965), 38800 states have internal predecessors, (160965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:22,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38801 states to 38801 states and 160965 transitions. [2021-06-05 23:46:22,384 INFO L78 Accepts]: Start accepts. Automaton has 38801 states and 160965 transitions. Word has length 39 [2021-06-05 23:46:22,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:22,384 INFO L482 AbstractCegarLoop]: Abstraction has 38801 states and 160965 transitions. [2021-06-05 23:46:22,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:22,384 INFO L276 IsEmpty]: Start isEmpty. Operand 38801 states and 160965 transitions. [2021-06-05 23:46:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:22,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:22,457 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:22,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:22,658 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:22,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:22,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1049841687, now seen corresponding path program 61 times [2021-06-05 23:46:22,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:22,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501131122] [2021-06-05 23:46:22,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:22,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:22,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501131122] [2021-06-05 23:46:22,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501131122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:22,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681630644] [2021-06-05 23:46:22,970 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 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 23:46:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:22,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:46:23,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:23,221 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:46:23,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 23:46:23,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:23,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:23,227 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 23:46:23,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 23:46:23,480 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-06-05 23:46:23,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:46:23,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:23,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:23,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:23,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:46:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:23,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681630644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:23,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:23,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:46:23,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459462702] [2021-06-05 23:46:23,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:46:23,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:23,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:46:23,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:46:23,560 INFO L87 Difference]: Start difference. First operand 38801 states and 160965 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:24,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:24,961 INFO L93 Difference]: Finished difference Result 67639 states and 276715 transitions. [2021-06-05 23:46:24,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:46:24,962 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:24,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:25,149 INFO L225 Difference]: With dead ends: 67639 [2021-06-05 23:46:25,149 INFO L226 Difference]: Without dead ends: 67391 [2021-06-05 23:46:25,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1244.2ms TimeCoverageRelationStatistics Valid=352, Invalid=1454, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:46:25,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67391 states. [2021-06-05 23:46:26,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67391 to 38987. [2021-06-05 23:46:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38987 states, 38986 states have (on average 4.1467449853793665) internal successors, (161665), 38986 states have internal predecessors, (161665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:26,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38987 states to 38987 states and 161665 transitions. [2021-06-05 23:46:26,224 INFO L78 Accepts]: Start accepts. Automaton has 38987 states and 161665 transitions. Word has length 39 [2021-06-05 23:46:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:26,225 INFO L482 AbstractCegarLoop]: Abstraction has 38987 states and 161665 transitions. [2021-06-05 23:46:26,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 38987 states and 161665 transitions. [2021-06-05 23:46:26,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:26,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:26,292 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:26,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:26,493 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:26,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:26,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1373542401, now seen corresponding path program 62 times [2021-06-05 23:46:26,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:26,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533407389] [2021-06-05 23:46:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:26,902 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-06-05 23:46:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:26,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:26,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533407389] [2021-06-05 23:46:26,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533407389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:26,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44212326] [2021-06-05 23:46:26,972 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:46:27,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:46:27,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:27,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:46:27,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:27,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:46:27,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:27,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:27,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:27,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:46:27,286 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:46:27,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:46:27,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:27,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:27,289 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 23:46:27,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:46:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:27,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44212326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:27,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:27,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:46:27,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582893055] [2021-06-05 23:46:27,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:46:27,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:27,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:46:27,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:46:27,334 INFO L87 Difference]: Start difference. First operand 38987 states and 161665 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:29,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:29,253 INFO L93 Difference]: Finished difference Result 84960 states and 345904 transitions. [2021-06-05 23:46:29,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:46:29,254 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:29,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:29,494 INFO L225 Difference]: With dead ends: 84960 [2021-06-05 23:46:29,494 INFO L226 Difference]: Without dead ends: 84808 [2021-06-05 23:46:29,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1277.7ms TimeCoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:46:29,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84808 states. [2021-06-05 23:46:30,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84808 to 38969. [2021-06-05 23:46:30,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38969 states, 38968 states have (on average 4.147736604393349) internal successors, (161629), 38968 states have internal predecessors, (161629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38969 states to 38969 states and 161629 transitions. [2021-06-05 23:46:30,679 INFO L78 Accepts]: Start accepts. Automaton has 38969 states and 161629 transitions. Word has length 39 [2021-06-05 23:46:30,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:30,679 INFO L482 AbstractCegarLoop]: Abstraction has 38969 states and 161629 transitions. [2021-06-05 23:46:30,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:30,679 INFO L276 IsEmpty]: Start isEmpty. Operand 38969 states and 161629 transitions. [2021-06-05 23:46:30,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:30,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:30,747 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:30,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2021-06-05 23:46:30,947 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:30,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:30,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1169621655, now seen corresponding path program 63 times [2021-06-05 23:46:30,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:30,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846331997] [2021-06-05 23:46:30,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:31,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:31,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846331997] [2021-06-05 23:46:31,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846331997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:31,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190125701] [2021-06-05 23:46:31,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:46:31,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:46:31,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:31,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:46:31,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:31,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-06-05 23:46:31,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:31,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:31,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:31,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:40 [2021-06-05 23:46:31,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:31,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:31,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 23:46:31,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:31,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:31,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:46:31,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:77 [2021-06-05 23:46:31,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:31,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:46:31,619 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:46:31,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:31,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:31,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-06-05 23:46:31,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:31,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:31,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:46:31,657 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-06-05 23:46:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:31,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190125701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:31,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:31,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:46:31,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091589920] [2021-06-05 23:46:31,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:46:31,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:31,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:46:31,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:46:31,746 INFO L87 Difference]: Start difference. First operand 38969 states and 161629 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:32,857 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-06-05 23:46:35,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:35,306 INFO L93 Difference]: Finished difference Result 76091 states and 310256 transitions. [2021-06-05 23:46:35,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:46:35,306 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:35,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:35,524 INFO L225 Difference]: With dead ends: 76091 [2021-06-05 23:46:35,524 INFO L226 Difference]: Without dead ends: 75900 [2021-06-05 23:46:35,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 2262.5ms TimeCoverageRelationStatistics Valid=813, Invalid=3219, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:46:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75900 states. [2021-06-05 23:46:36,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75900 to 39177. [2021-06-05 23:46:36,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39177 states, 39176 states have (on average 4.147488258117215) internal successors, (162482), 39176 states have internal predecessors, (162482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39177 states to 39177 states and 162482 transitions. [2021-06-05 23:46:36,676 INFO L78 Accepts]: Start accepts. Automaton has 39177 states and 162482 transitions. Word has length 39 [2021-06-05 23:46:36,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:36,676 INFO L482 AbstractCegarLoop]: Abstraction has 39177 states and 162482 transitions. [2021-06-05 23:46:36,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:36,676 INFO L276 IsEmpty]: Start isEmpty. Operand 39177 states and 162482 transitions. [2021-06-05 23:46:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:36,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:36,750 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:36,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:36,957 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:36,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:36,957 INFO L82 PathProgramCache]: Analyzing trace with hash -532350717, now seen corresponding path program 64 times [2021-06-05 23:46:36,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:36,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438527663] [2021-06-05 23:46:36,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:37,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:37,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438527663] [2021-06-05 23:46:37,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438527663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:37,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296118804] [2021-06-05 23:46:37,255 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 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 23:46:37,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:46:37,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:37,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:46:37,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:37,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:46:37,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:37,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:37,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:37,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:46:37,536 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:46:37,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:46:37,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:37,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:37,539 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 23:46:37,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:46:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:37,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296118804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:37,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:37,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:46:37,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080385596] [2021-06-05 23:46:37,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:46:37,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:37,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:46:37,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:46:37,582 INFO L87 Difference]: Start difference. First operand 39177 states and 162482 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:39,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:39,704 INFO L93 Difference]: Finished difference Result 85490 states and 348598 transitions. [2021-06-05 23:46:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:46:39,704 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:39,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:39,953 INFO L225 Difference]: With dead ends: 85490 [2021-06-05 23:46:39,953 INFO L226 Difference]: Without dead ends: 85416 [2021-06-05 23:46:39,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1111.5ms TimeCoverageRelationStatistics Valid=399, Invalid=1857, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:46:40,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85416 states. [2021-06-05 23:46:40,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85416 to 38765. [2021-06-05 23:46:41,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38765 states, 38764 states have (on average 4.149133216386338) internal successors, (160837), 38764 states have internal predecessors, (160837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:41,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38765 states to 38765 states and 160837 transitions. [2021-06-05 23:46:41,141 INFO L78 Accepts]: Start accepts. Automaton has 38765 states and 160837 transitions. Word has length 39 [2021-06-05 23:46:41,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:41,141 INFO L482 AbstractCegarLoop]: Abstraction has 38765 states and 160837 transitions. [2021-06-05 23:46:41,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:41,141 INFO L276 IsEmpty]: Start isEmpty. Operand 38765 states and 160837 transitions. [2021-06-05 23:46:41,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:41,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:41,208 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:41,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:41,408 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:41,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:41,409 INFO L82 PathProgramCache]: Analyzing trace with hash -912086607, now seen corresponding path program 65 times [2021-06-05 23:46:41,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:41,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621586902] [2021-06-05 23:46:41,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:41,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:41,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621586902] [2021-06-05 23:46:41,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621586902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:41,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836637306] [2021-06-05 23:46:41,666 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 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 23:46:41,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:46:41,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:41,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 23:46:41,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:41,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:41,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:41,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:41,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:41,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 23:46:41,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:46:41,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:41,948 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 23:46:41,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:46 [2021-06-05 23:46:42,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:42,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:42,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:46:42,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:42,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:42,047 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 23:46:42,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:18 [2021-06-05 23:46:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:42,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836637306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:42,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:42,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 23:46:42,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740540806] [2021-06-05 23:46:42,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:46:42,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:42,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:46:42,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:46:42,119 INFO L87 Difference]: Start difference. First operand 38765 states and 160837 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:45,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:45,243 INFO L93 Difference]: Finished difference Result 63376 states and 258241 transitions. [2021-06-05 23:46:45,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:46:45,244 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:45,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:45,424 INFO L225 Difference]: With dead ends: 63376 [2021-06-05 23:46:45,425 INFO L226 Difference]: Without dead ends: 63321 [2021-06-05 23:46:45,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1807.2ms TimeCoverageRelationStatistics Valid=421, Invalid=3119, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:46:45,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63321 states. [2021-06-05 23:46:46,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63321 to 39588. [2021-06-05 23:46:46,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39588 states, 39587 states have (on average 4.147093742895395) internal successors, (164171), 39587 states have internal predecessors, (164171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:46,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39588 states to 39588 states and 164171 transitions. [2021-06-05 23:46:46,517 INFO L78 Accepts]: Start accepts. Automaton has 39588 states and 164171 transitions. Word has length 39 [2021-06-05 23:46:46,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:46,517 INFO L482 AbstractCegarLoop]: Abstraction has 39588 states and 164171 transitions. [2021-06-05 23:46:46,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 39588 states and 164171 transitions. [2021-06-05 23:46:46,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:46,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:46,587 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:46,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:46,797 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:46,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:46,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1022432867, now seen corresponding path program 66 times [2021-06-05 23:46:46,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:46,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143974037] [2021-06-05 23:46:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:47,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:47,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143974037] [2021-06-05 23:46:47,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143974037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:47,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531351229] [2021-06-05 23:46:47,102 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 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 23:46:47,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:46:47,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:47,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 23:46:47,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:47,342 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:46:47,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:46:47,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:47,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:47,348 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 23:46:47,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 23:46:47,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:47,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:46:47,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:47,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:47,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:46:47,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:47 [2021-06-05 23:46:47,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:47,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:47,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 25 [2021-06-05 23:46:47,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:46:47,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:47,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:46:47,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:47,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:47,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-06-05 23:46:47,721 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:46:47,790 INFO L628 ElimStorePlain]: treesize reduction 41, result has 67.2 percent of original size [2021-06-05 23:46:47,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:46:47,794 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:136, output treesize:66 [2021-06-05 23:46:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:47,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531351229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:47,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:47,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-05 23:46:47,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131500503] [2021-06-05 23:46:47,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:46:47,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:47,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:46:47,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:46:47,972 INFO L87 Difference]: Start difference. First operand 39588 states and 164171 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:48,874 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-06-05 23:46:51,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:51,788 INFO L93 Difference]: Finished difference Result 67595 states and 273831 transitions. [2021-06-05 23:46:51,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 23:46:51,788 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:51,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:51,966 INFO L225 Difference]: With dead ends: 67595 [2021-06-05 23:46:51,966 INFO L226 Difference]: Without dead ends: 67447 [2021-06-05 23:46:51,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2624.8ms TimeCoverageRelationStatistics Valid=694, Invalid=4418, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:46:52,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67447 states. [2021-06-05 23:46:52,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67447 to 39750. [2021-06-05 23:46:52,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39750 states, 39749 states have (on average 4.144632569372814) internal successors, (164745), 39749 states have internal predecessors, (164745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39750 states to 39750 states and 164745 transitions. [2021-06-05 23:46:53,042 INFO L78 Accepts]: Start accepts. Automaton has 39750 states and 164745 transitions. Word has length 39 [2021-06-05 23:46:53,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:53,042 INFO L482 AbstractCegarLoop]: Abstraction has 39750 states and 164745 transitions. [2021-06-05 23:46:53,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:53,042 INFO L276 IsEmpty]: Start isEmpty. Operand 39750 states and 164745 transitions. [2021-06-05 23:46:53,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:53,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:53,110 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:53,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 23:46:53,311 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:53,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:53,311 INFO L82 PathProgramCache]: Analyzing trace with hash -659404043, now seen corresponding path program 67 times [2021-06-05 23:46:53,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:53,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686504410] [2021-06-05 23:46:53,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:53,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:53,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686504410] [2021-06-05 23:46:53,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686504410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:53,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463951628] [2021-06-05 23:46:53,615 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 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 23:46:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:53,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:46:53,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:53,834 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:46:53,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:46:53,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:53,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:53,841 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 23:46:53,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:46:53,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:46:53,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:53,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:53,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:53,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:46:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:53,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463951628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:53,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:53,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:46:53,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645667054] [2021-06-05 23:46:53,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:46:53,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:53,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:46:53,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:46:53,942 INFO L87 Difference]: Start difference. First operand 39750 states and 164745 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:55,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:55,902 INFO L93 Difference]: Finished difference Result 86444 states and 351579 transitions. [2021-06-05 23:46:55,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:46:55,902 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:55,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:56,146 INFO L225 Difference]: With dead ends: 86444 [2021-06-05 23:46:56,146 INFO L226 Difference]: Without dead ends: 86228 [2021-06-05 23:46:56,146 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1256.1ms TimeCoverageRelationStatistics Valid=439, Invalid=2423, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:46:56,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86228 states. [2021-06-05 23:46:57,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86228 to 39544. [2021-06-05 23:46:57,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39544 states, 39543 states have (on average 4.147712616645171) internal successors, (164013), 39543 states have internal predecessors, (164013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:57,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39544 states to 39544 states and 164013 transitions. [2021-06-05 23:46:57,402 INFO L78 Accepts]: Start accepts. Automaton has 39544 states and 164013 transitions. Word has length 39 [2021-06-05 23:46:57,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:57,402 INFO L482 AbstractCegarLoop]: Abstraction has 39544 states and 164013 transitions. [2021-06-05 23:46:57,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:57,402 INFO L276 IsEmpty]: Start isEmpty. Operand 39544 states and 164013 transitions. [2021-06-05 23:46:57,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:57,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:57,472 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:57,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 23:46:57,673 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:57,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:57,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1316741681, now seen corresponding path program 68 times [2021-06-05 23:46:57,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:57,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775717469] [2021-06-05 23:46:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:57,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:57,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775717469] [2021-06-05 23:46:57,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775717469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:57,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965413518] [2021-06-05 23:46:57,929 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 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 23:46:57,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:46:57,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:57,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:46:57,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:58,125 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:46:58,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:46:58,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:58,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:58,134 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 23:46:58,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:46:58,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:46:58,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:58,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:58,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:58,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 23:46:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:58,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965413518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:58,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:58,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:46:58,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908035387] [2021-06-05 23:46:58,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:46:58,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:58,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:46:58,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:46:58,219 INFO L87 Difference]: Start difference. First operand 39544 states and 164013 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:00,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:00,536 INFO L93 Difference]: Finished difference Result 98987 states and 403310 transitions. [2021-06-05 23:47:00,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:47:00,537 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:47:00,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:01,059 INFO L225 Difference]: With dead ends: 98987 [2021-06-05 23:47:01,059 INFO L226 Difference]: Without dead ends: 98932 [2021-06-05 23:47:01,060 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1447.2ms TimeCoverageRelationStatistics Valid=474, Invalid=2178, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:47:01,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98932 states. [2021-06-05 23:47:02,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98932 to 39435. [2021-06-05 23:47:02,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39435 states, 39434 states have (on average 4.146092204696455) internal successors, (163497), 39434 states have internal predecessors, (163497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39435 states to 39435 states and 163497 transitions. [2021-06-05 23:47:02,306 INFO L78 Accepts]: Start accepts. Automaton has 39435 states and 163497 transitions. Word has length 39 [2021-06-05 23:47:02,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:02,306 INFO L482 AbstractCegarLoop]: Abstraction has 39435 states and 163497 transitions. [2021-06-05 23:47:02,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:02,306 INFO L276 IsEmpty]: Start isEmpty. Operand 39435 states and 163497 transitions. [2021-06-05 23:47:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:47:02,375 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:02,375 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:02,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 23:47:02,589 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:02,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:02,589 INFO L82 PathProgramCache]: Analyzing trace with hash -2069317459, now seen corresponding path program 69 times [2021-06-05 23:47:02,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:02,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700521086] [2021-06-05 23:47:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:02,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:02,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700521086] [2021-06-05 23:47:02,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700521086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:02,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777797451] [2021-06-05 23:47:02,826 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 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 23:47:02,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:47:02,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:02,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 23:47:02,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:03,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:03,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 23:47:03,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:03,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:03,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:03,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:60 [2021-06-05 23:47:03,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:03,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:03,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2021-06-05 23:47:03,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:03,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:03,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:03,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2021-06-05 23:47:03,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:03,229 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 23:47:03,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 23:47:03,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:03,238 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 23:47:03,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 23:47:03,239 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:03,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:03,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:47:03,305 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:221, output treesize:275 [2021-06-05 23:47:03,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:03,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:47:03,592 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:03,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:03,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:03,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:47:03,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:03,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:03,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:47:03,644 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:74, output treesize:60 [2021-06-05 23:47:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:03,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777797451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:03,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:03,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-05 23:47:03,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071248053] [2021-06-05 23:47:03,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:47:03,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:03,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:47:03,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:47:03,718 INFO L87 Difference]: Start difference. First operand 39435 states and 163497 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:04,914 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 23:47:05,364 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 62 [2021-06-05 23:47:08,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:08,826 INFO L93 Difference]: Finished difference Result 70941 states and 289060 transitions. [2021-06-05 23:47:08,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 23:47:08,827 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:47:08,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:09,029 INFO L225 Difference]: With dead ends: 70941 [2021-06-05 23:47:09,029 INFO L226 Difference]: Without dead ends: 70859 [2021-06-05 23:47:09,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 4107.4ms TimeCoverageRelationStatistics Valid=786, Invalid=6524, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 23:47:09,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70859 states. [2021-06-05 23:47:09,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70859 to 40015. [2021-06-05 23:47:09,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40015 states, 40014 states have (on average 4.1440495826460735) internal successors, (165820), 40014 states have internal predecessors, (165820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40015 states to 40015 states and 165820 transitions. [2021-06-05 23:47:10,062 INFO L78 Accepts]: Start accepts. Automaton has 40015 states and 165820 transitions. Word has length 39 [2021-06-05 23:47:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:10,063 INFO L482 AbstractCegarLoop]: Abstraction has 40015 states and 165820 transitions. [2021-06-05 23:47:10,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:10,063 INFO L276 IsEmpty]: Start isEmpty. Operand 40015 states and 165820 transitions. [2021-06-05 23:47:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:47:10,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:10,135 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:10,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:10,335 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:10,335 INFO L82 PathProgramCache]: Analyzing trace with hash -270359081, now seen corresponding path program 70 times [2021-06-05 23:47:10,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:10,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731931637] [2021-06-05 23:47:10,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:10,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:10,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731931637] [2021-06-05 23:47:10,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731931637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:10,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394054570] [2021-06-05 23:47:10,576 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 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 23:47:10,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:47:10,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:10,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:47:10,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:10,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:47:10,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:10,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:10,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:10,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:47:10,815 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:47:10,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 23:47:10,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:10,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:11,025 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 23:47:11,025 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 23:47:11,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 23:47:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:11,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394054570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:11,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:11,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:47:11,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62753072] [2021-06-05 23:47:11,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:47:11,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:11,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:47:11,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:47:11,091 INFO L87 Difference]: Start difference. First operand 40015 states and 165820 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:12,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:12,746 INFO L93 Difference]: Finished difference Result 79794 states and 328449 transitions. [2021-06-05 23:47:12,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:47:12,746 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:47:12,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:12,970 INFO L225 Difference]: With dead ends: 79794 [2021-06-05 23:47:12,970 INFO L226 Difference]: Without dead ends: 79739 [2021-06-05 23:47:12,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 838.8ms TimeCoverageRelationStatistics Valid=295, Invalid=1427, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:47:13,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79739 states. [2021-06-05 23:47:13,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79739 to 40231. [2021-06-05 23:47:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40231 states, 40230 states have (on average 4.1465572955505845) internal successors, (166816), 40230 states have internal predecessors, (166816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40231 states to 40231 states and 166816 transitions. [2021-06-05 23:47:14,305 INFO L78 Accepts]: Start accepts. Automaton has 40231 states and 166816 transitions. Word has length 39 [2021-06-05 23:47:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:14,305 INFO L482 AbstractCegarLoop]: Abstraction has 40231 states and 166816 transitions. [2021-06-05 23:47:14,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 40231 states and 166816 transitions. [2021-06-05 23:47:14,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:47:14,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:14,390 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:14,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:14,602 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:14,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:14,603 INFO L82 PathProgramCache]: Analyzing trace with hash -235833293, now seen corresponding path program 71 times [2021-06-05 23:47:14,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:14,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33618210] [2021-06-05 23:47:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:14,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:14,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33618210] [2021-06-05 23:47:14,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33618210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:14,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109782006] [2021-06-05 23:47:14,838 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 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 23:47:14,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:47:14,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:14,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:47:14,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:15,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:15,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 23:47:15,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:15,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:15,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:47:15,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:63 [2021-06-05 23:47:15,833 INFO L446 ElimStorePlain]: Different costs {1=[q1, v_prenex_145], 3=[v_prenex_146]} [2021-06-05 23:47:15,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:15,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 23:47:15,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:47:15,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:15,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:15,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 23:47:15,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:15,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:15,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:15,954 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 23:47:15,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:16,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:16,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 23:47:16,017 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 10 variables, input treesize:165, output treesize:88 [2021-06-05 23:47:16,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:16,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:16,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:16,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:16,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 8 [2021-06-05 23:47:16,167 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:47:16,202 INFO L628 ElimStorePlain]: treesize reduction 12, result has 81.5 percent of original size [2021-06-05 23:47:16,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:47:16,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:38 [2021-06-05 23:47:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:16,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109782006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:16,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:16,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:47:16,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369375848] [2021-06-05 23:47:16,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:47:16,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:16,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:47:16,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:47:16,294 INFO L87 Difference]: Start difference. First operand 40231 states and 166816 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:17,769 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-05 23:47:18,782 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 83 [2021-06-05 23:47:22,608 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2021-06-05 23:47:23,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:23,936 INFO L93 Difference]: Finished difference Result 89119 states and 363462 transitions. [2021-06-05 23:47:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 23:47:23,936 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:47:23,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:24,367 INFO L225 Difference]: With dead ends: 89119 [2021-06-05 23:47:24,367 INFO L226 Difference]: Without dead ends: 89009 [2021-06-05 23:47:24,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 5715.7ms TimeCoverageRelationStatistics Valid=1006, Invalid=7736, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 23:47:24,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89009 states. [2021-06-05 23:47:25,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89009 to 40878. [2021-06-05 23:47:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40878 states, 40877 states have (on average 4.149839763192015) internal successors, (169633), 40877 states have internal predecessors, (169633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:25,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40878 states to 40878 states and 169633 transitions. [2021-06-05 23:47:25,682 INFO L78 Accepts]: Start accepts. Automaton has 40878 states and 169633 transitions. Word has length 39 [2021-06-05 23:47:25,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:25,682 INFO L482 AbstractCegarLoop]: Abstraction has 40878 states and 169633 transitions. [2021-06-05 23:47:25,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 40878 states and 169633 transitions. [2021-06-05 23:47:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:47:25,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:25,755 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:25,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:25,956 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:25,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:25,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1287912465, now seen corresponding path program 72 times [2021-06-05 23:47:25,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:25,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978366285] [2021-06-05 23:47:25,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:26,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:26,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978366285] [2021-06-05 23:47:26,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978366285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:26,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4057518] [2021-06-05 23:47:26,210 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 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 23:47:26,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:47:26,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:26,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 23:47:26,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:26,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:47:26,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:26,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:26,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:26,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:47:26,511 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:47:26,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:47:26,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:26,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:26,513 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 23:47:26,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:47:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:26,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4057518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:26,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:26,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 23:47:26,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042525331] [2021-06-05 23:47:26,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:47:26,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:26,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:47:26,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:47:26,545 INFO L87 Difference]: Start difference. First operand 40878 states and 169633 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:28,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:28,391 INFO L93 Difference]: Finished difference Result 88255 states and 364108 transitions. [2021-06-05 23:47:28,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:47:28,391 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:47:28,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:28,641 INFO L225 Difference]: With dead ends: 88255 [2021-06-05 23:47:28,642 INFO L226 Difference]: Without dead ends: 88200 [2021-06-05 23:47:28,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 836.3ms TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:47:28,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88200 states. [2021-06-05 23:47:29,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88200 to 41106. [2021-06-05 23:47:29,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41106 states, 41105 states have (on average 4.151733365770587) internal successors, (170657), 41105 states have internal predecessors, (170657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41106 states to 41106 states and 170657 transitions. [2021-06-05 23:47:29,871 INFO L78 Accepts]: Start accepts. Automaton has 41106 states and 170657 transitions. Word has length 39 [2021-06-05 23:47:29,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:29,871 INFO L482 AbstractCegarLoop]: Abstraction has 41106 states and 170657 transitions. [2021-06-05 23:47:29,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:29,871 INFO L276 IsEmpty]: Start isEmpty. Operand 41106 states and 170657 transitions. [2021-06-05 23:47:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:47:29,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:29,942 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:30,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:30,143 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:30,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:30,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1951178861, now seen corresponding path program 73 times [2021-06-05 23:47:30,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:30,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231185977] [2021-06-05 23:47:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:30,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:30,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231185977] [2021-06-05 23:47:30,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231185977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:30,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257550838] [2021-06-05 23:47:30,416 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 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 23:47:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:30,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:47:30,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:30,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:47:30,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:30,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:30,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:30,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:47:30,674 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:47:30,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:47:30,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:30,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:30,677 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 23:47:30,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:47:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:30,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257550838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:30,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:30,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:47:30,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033887156] [2021-06-05 23:47:30,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:47:30,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:30,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:47:30,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:47:30,717 INFO L87 Difference]: Start difference. First operand 41106 states and 170657 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:33,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:33,446 INFO L93 Difference]: Finished difference Result 122533 states and 497811 transitions. [2021-06-05 23:47:33,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:47:33,446 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:47:33,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:33,815 INFO L225 Difference]: With dead ends: 122533 [2021-06-05 23:47:33,815 INFO L226 Difference]: Without dead ends: 122478 [2021-06-05 23:47:33,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1240.7ms TimeCoverageRelationStatistics Valid=510, Invalid=2460, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:47:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122478 states. [2021-06-05 23:47:35,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122478 to 39543. [2021-06-05 23:47:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39543 states, 39542 states have (on average 4.1444539982803095) internal successors, (163880), 39542 states have internal predecessors, (163880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:35,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39543 states to 39543 states and 163880 transitions. [2021-06-05 23:47:35,323 INFO L78 Accepts]: Start accepts. Automaton has 39543 states and 163880 transitions. Word has length 39 [2021-06-05 23:47:35,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:35,324 INFO L482 AbstractCegarLoop]: Abstraction has 39543 states and 163880 transitions. [2021-06-05 23:47:35,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:35,324 INFO L276 IsEmpty]: Start isEmpty. Operand 39543 states and 163880 transitions. [2021-06-05 23:47:35,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:47:35,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:35,397 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:35,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 23:47:35,597 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:35,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:35,598 INFO L82 PathProgramCache]: Analyzing trace with hash 189101847, now seen corresponding path program 74 times [2021-06-05 23:47:35,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:35,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009704515] [2021-06-05 23:47:35,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:35,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:35,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009704515] [2021-06-05 23:47:35,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009704515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:35,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107999973] [2021-06-05 23:47:35,917 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 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 23:47:35,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:47:35,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:35,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:47:35,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:36,150 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:47:36,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 23:47:36,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:36,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:36,157 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 23:47:36,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 23:47:36,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:47:36,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:36,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:36,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:36,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:47:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:36,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107999973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:36,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:36,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:47:36,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018269280] [2021-06-05 23:47:36,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:47:36,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:36,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:47:36,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:47:36,230 INFO L87 Difference]: Start difference. First operand 39543 states and 163880 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:38,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:38,239 INFO L93 Difference]: Finished difference Result 72417 states and 295850 transitions. [2021-06-05 23:47:38,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:47:38,240 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:47:38,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:38,445 INFO L225 Difference]: With dead ends: 72417 [2021-06-05 23:47:38,445 INFO L226 Difference]: Without dead ends: 72169 [2021-06-05 23:47:38,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1074.8ms TimeCoverageRelationStatistics Valid=352, Invalid=1628, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:47:38,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72169 states. [2021-06-05 23:47:39,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72169 to 39729. [2021-06-05 23:47:39,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39729 states, 39728 states have (on average 4.142670157068062) internal successors, (164580), 39728 states have internal predecessors, (164580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:39,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39729 states to 39729 states and 164580 transitions. [2021-06-05 23:47:39,562 INFO L78 Accepts]: Start accepts. Automaton has 39729 states and 164580 transitions. Word has length 39 [2021-06-05 23:47:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:39,562 INFO L482 AbstractCegarLoop]: Abstraction has 39729 states and 164580 transitions. [2021-06-05 23:47:39,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:39,562 INFO L276 IsEmpty]: Start isEmpty. Operand 39729 states and 164580 transitions. [2021-06-05 23:47:39,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:47:39,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:39,633 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:39,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 23:47:39,833 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:39,834 INFO L82 PathProgramCache]: Analyzing trace with hash -2088779397, now seen corresponding path program 75 times [2021-06-05 23:47:39,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:39,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756697430] [2021-06-05 23:47:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:40,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:40,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756697430] [2021-06-05 23:47:40,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756697430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:40,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853296358] [2021-06-05 23:47:40,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:40,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:47:40,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:40,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:47:40,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:40,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:40,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 23:47:40,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:40,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:40,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:47:40,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:68 [2021-06-05 23:47:40,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:40,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 23:47:40,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:40,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:40,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 23:47:40,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:47:40,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:40,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:40,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-06-05 23:47:40,824 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:40,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:40,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:40,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-06-05 23:47:40,838 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:40,932 INFO L628 ElimStorePlain]: treesize reduction 67, result has 68.2 percent of original size [2021-06-05 23:47:40,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-05 23:47:40,946 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:241, output treesize:166 [2021-06-05 23:47:41,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:41,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:47:41,131 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:41,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:41,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:41,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:45 [2021-06-05 23:47:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:41,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853296358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:41,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:41,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-05 23:47:41,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076593094] [2021-06-05 23:47:41,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:47:41,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:41,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:47:41,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:47:41,243 INFO L87 Difference]: Start difference. First operand 39729 states and 164580 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:43,041 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 23:47:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:45,542 INFO L93 Difference]: Finished difference Result 79614 states and 321408 transitions. [2021-06-05 23:47:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 23:47:45,543 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:47:45,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:45,883 INFO L225 Difference]: With dead ends: 79614 [2021-06-05 23:47:45,884 INFO L226 Difference]: Without dead ends: 79324 [2021-06-05 23:47:45,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 3787.7ms TimeCoverageRelationStatistics Valid=1141, Invalid=5831, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:47:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79324 states. [2021-06-05 23:47:46,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79324 to 39675. [2021-06-05 23:47:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39675 states, 39674 states have (on average 4.143166809497404) internal successors, (164376), 39674 states have internal predecessors, (164376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:47,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39675 states to 39675 states and 164376 transitions. [2021-06-05 23:47:47,050 INFO L78 Accepts]: Start accepts. Automaton has 39675 states and 164376 transitions. Word has length 39 [2021-06-05 23:47:47,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:47,051 INFO L482 AbstractCegarLoop]: Abstraction has 39675 states and 164376 transitions. [2021-06-05 23:47:47,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:47,051 INFO L276 IsEmpty]: Start isEmpty. Operand 39675 states and 164376 transitions. [2021-06-05 23:47:47,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:47:47,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:47,120 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:47,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 23:47:47,320 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:47,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:47,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1884858651, now seen corresponding path program 76 times [2021-06-05 23:47:47,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:47,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891215284] [2021-06-05 23:47:47,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:47,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:47,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891215284] [2021-06-05 23:47:47,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891215284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:47,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627790189] [2021-06-05 23:47:47,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:47,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:47:47,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:47,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:47:47,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:47,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:47:47,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:47,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:47,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:47,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:47:47,867 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:47:47,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:47:47,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:47,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:47,870 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 23:47:47,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:47:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:47,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627790189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:47,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:47,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:47:47,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831472352] [2021-06-05 23:47:47,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:47:47,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:47,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:47:47,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:47:47,912 INFO L87 Difference]: Start difference. First operand 39675 states and 164376 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:49,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:49,584 INFO L93 Difference]: Finished difference Result 74558 states and 304587 transitions. [2021-06-05 23:47:49,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:47:49,584 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:47:49,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:49,793 INFO L225 Difference]: With dead ends: 74558 [2021-06-05 23:47:49,794 INFO L226 Difference]: Without dead ends: 74468 [2021-06-05 23:47:49,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 961.6ms TimeCoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:47:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74468 states. [2021-06-05 23:47:50,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74468 to 39791. [2021-06-05 23:47:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39791 states, 39790 states have (on average 4.143553656697662) internal successors, (164872), 39790 states have internal predecessors, (164872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39791 states to 39791 states and 164872 transitions. [2021-06-05 23:47:50,885 INFO L78 Accepts]: Start accepts. Automaton has 39791 states and 164872 transitions. Word has length 39 [2021-06-05 23:47:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:50,885 INFO L482 AbstractCegarLoop]: Abstraction has 39791 states and 164872 transitions. [2021-06-05 23:47:50,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:50,885 INFO L276 IsEmpty]: Start isEmpty. Operand 39791 states and 164872 transitions. [2021-06-05 23:47:50,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:47:50,955 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:50,955 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:51,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable410,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:51,156 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:51,156 INFO L82 PathProgramCache]: Analyzing trace with hash 278457189, now seen corresponding path program 77 times [2021-06-05 23:47:51,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:51,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643304182] [2021-06-05 23:47:51,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:51,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:51,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643304182] [2021-06-05 23:47:51,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643304182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:51,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571776761] [2021-06-05 23:47:51,471 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 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 23:47:51,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:47:51,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:51,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 23:47:51,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:51,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:51,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 23:47:51,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:51,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:51,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:47:51,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:76 [2021-06-05 23:47:54,037 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_151], 6=[q1, v_prenex_149]} [2021-06-05 23:47:54,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:54,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:54,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2021-06-05 23:47:54,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:54,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:54,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:54,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:54,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:54,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:54,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2021-06-05 23:47:54,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:47:54,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:54,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:54,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:54,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:54,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:54,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-06-05 23:47:54,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 23:47:54,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:54,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 23:47:54,220 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:187, output treesize:101 [2021-06-05 23:47:54,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:54,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:54,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:54,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:54,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 23:47:54,392 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:54,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:54,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:54,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 23:47:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:54,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571776761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:54,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:54,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:47:54,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050397563] [2021-06-05 23:47:54,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:47:54,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:54,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:47:54,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=851, Unknown=1, NotChecked=0, Total=992 [2021-06-05 23:47:54,660 INFO L87 Difference]: Start difference. First operand 39791 states and 164872 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:57,065 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2021-06-05 23:47:58,074 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 23:48:03,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:03,567 INFO L93 Difference]: Finished difference Result 112936 states and 457086 transitions. [2021-06-05 23:48:03,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 23:48:03,567 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:48:03,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:03,910 INFO L225 Difference]: With dead ends: 112936 [2021-06-05 23:48:03,911 INFO L226 Difference]: Without dead ends: 112517 [2021-06-05 23:48:03,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3965 ImplicationChecksByTransitivity, 7930.6ms TimeCoverageRelationStatistics Valid=1684, Invalid=10747, Unknown=1, NotChecked=0, Total=12432 [2021-06-05 23:48:04,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112517 states. [2021-06-05 23:48:05,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112517 to 39606. [2021-06-05 23:48:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39606 states, 39605 states have (on average 4.143895972730716) internal successors, (164119), 39605 states have internal predecessors, (164119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:05,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39606 states to 39606 states and 164119 transitions. [2021-06-05 23:48:05,323 INFO L78 Accepts]: Start accepts. Automaton has 39606 states and 164119 transitions. Word has length 39 [2021-06-05 23:48:05,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:05,323 INFO L482 AbstractCegarLoop]: Abstraction has 39606 states and 164119 transitions. [2021-06-05 23:48:05,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:05,323 INFO L276 IsEmpty]: Start isEmpty. Operand 39606 states and 164119 transitions. [2021-06-05 23:48:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:48:05,392 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:05,392 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:05,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 23:48:05,593 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:05,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:05,593 INFO L82 PathProgramCache]: Analyzing trace with hash -120548947, now seen corresponding path program 78 times [2021-06-05 23:48:05,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:05,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229265863] [2021-06-05 23:48:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:06,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:06,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229265863] [2021-06-05 23:48:06,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229265863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:06,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059675002] [2021-06-05 23:48:06,141 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 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 23:48:06,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:48:06,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:06,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:48:06,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:06,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:48:06,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:06,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:06,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:06,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-06-05 23:48:06,373 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:48:06,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 23:48:06,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:06,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:06,378 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 23:48:06,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-06-05 23:48:06,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:06,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:48:06,436 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:48:06,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:06,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:48:06,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:48:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:06,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059675002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:06,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:06,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:48:06,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176825642] [2021-06-05 23:48:06,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:48:06,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:06,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:48:06,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:48:06,480 INFO L87 Difference]: Start difference. First operand 39606 states and 164119 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:08,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:08,587 INFO L93 Difference]: Finished difference Result 95037 states and 391291 transitions. [2021-06-05 23:48:08,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:48:08,587 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:48:08,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:08,863 INFO L225 Difference]: With dead ends: 95037 [2021-06-05 23:48:08,864 INFO L226 Difference]: Without dead ends: 94982 [2021-06-05 23:48:08,864 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 1433.0ms TimeCoverageRelationStatistics Valid=439, Invalid=2531, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:48:08,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94982 states. [2021-06-05 23:48:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94982 to 41610. [2021-06-05 23:48:10,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41610 states, 41609 states have (on average 4.142036578624817) internal successors, (172346), 41609 states have internal predecessors, (172346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:10,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41610 states to 41610 states and 172346 transitions. [2021-06-05 23:48:10,190 INFO L78 Accepts]: Start accepts. Automaton has 41610 states and 172346 transitions. Word has length 39 [2021-06-05 23:48:10,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:10,191 INFO L482 AbstractCegarLoop]: Abstraction has 41610 states and 172346 transitions. [2021-06-05 23:48:10,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:10,191 INFO L276 IsEmpty]: Start isEmpty. Operand 41610 states and 172346 transitions. [2021-06-05 23:48:10,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:48:10,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:10,288 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:10,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:10,501 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:10,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:10,502 INFO L82 PathProgramCache]: Analyzing trace with hash -758136977, now seen corresponding path program 79 times [2021-06-05 23:48:10,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:10,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035609770] [2021-06-05 23:48:10,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:10,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:10,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035609770] [2021-06-05 23:48:10,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035609770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:10,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081530761] [2021-06-05 23:48:10,739 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 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 23:48:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:10,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:48:10,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:10,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:48:10,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:10,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:10,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:10,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 23:48:11,002 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:48:11,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:48:11,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:11,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:11,005 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 23:48:11,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:48:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:11,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081530761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:11,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:11,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 23:48:11,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543806971] [2021-06-05 23:48:11,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:48:11,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:11,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:48:11,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:48:11,037 INFO L87 Difference]: Start difference. First operand 41610 states and 172346 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:12,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:12,876 INFO L93 Difference]: Finished difference Result 96288 states and 397003 transitions. [2021-06-05 23:48:12,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:48:12,876 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:48:12,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:13,148 INFO L225 Difference]: With dead ends: 96288 [2021-06-05 23:48:13,148 INFO L226 Difference]: Without dead ends: 96233 [2021-06-05 23:48:13,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 815.0ms TimeCoverageRelationStatistics Valid=269, Invalid=1623, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:48:13,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96233 states. [2021-06-05 23:48:14,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96233 to 43341. [2021-06-05 23:48:14,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43341 states, 43340 states have (on average 4.144370096908168) internal successors, (179617), 43340 states have internal predecessors, (179617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:14,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43341 states to 43341 states and 179617 transitions. [2021-06-05 23:48:14,531 INFO L78 Accepts]: Start accepts. Automaton has 43341 states and 179617 transitions. Word has length 39 [2021-06-05 23:48:14,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:14,531 INFO L482 AbstractCegarLoop]: Abstraction has 43341 states and 179617 transitions. [2021-06-05 23:48:14,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:14,531 INFO L276 IsEmpty]: Start isEmpty. Operand 43341 states and 179617 transitions. [2021-06-05 23:48:14,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:48:14,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:14,611 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:14,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 23:48:14,811 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:14,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:14,812 INFO L82 PathProgramCache]: Analyzing trace with hash 660856047, now seen corresponding path program 80 times [2021-06-05 23:48:14,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:14,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019553359] [2021-06-05 23:48:14,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:15,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:15,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019553359] [2021-06-05 23:48:15,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019553359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:15,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137414681] [2021-06-05 23:48:15,348 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 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 23:48:15,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:48:15,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:15,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:48:15,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:15,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:48:15,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:15,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:15,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:15,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 23:48:15,611 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:48:15,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:48:15,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:15,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:15,613 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 23:48:15,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:48:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:15,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137414681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:15,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:15,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 23:48:15,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426863480] [2021-06-05 23:48:15,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:48:15,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:15,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:48:15,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:48:15,644 INFO L87 Difference]: Start difference. First operand 43341 states and 179617 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:17,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:17,590 INFO L93 Difference]: Finished difference Result 92890 states and 382937 transitions. [2021-06-05 23:48:17,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:48:17,591 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:48:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:17,870 INFO L225 Difference]: With dead ends: 92890 [2021-06-05 23:48:17,870 INFO L226 Difference]: Without dead ends: 92835 [2021-06-05 23:48:17,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1100.0ms TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:48:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92835 states. [2021-06-05 23:48:19,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92835 to 43305. [2021-06-05 23:48:19,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43305 states, 43304 states have (on average 4.144443931276556) internal successors, (179471), 43304 states have internal predecessors, (179471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:19,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43305 states to 43305 states and 179471 transitions. [2021-06-05 23:48:19,205 INFO L78 Accepts]: Start accepts. Automaton has 43305 states and 179471 transitions. Word has length 39 [2021-06-05 23:48:19,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:19,205 INFO L482 AbstractCegarLoop]: Abstraction has 43305 states and 179471 transitions. [2021-06-05 23:48:19,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:19,205 INFO L276 IsEmpty]: Start isEmpty. Operand 43305 states and 179471 transitions. [2021-06-05 23:48:19,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:48:19,281 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:19,281 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:19,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-05 23:48:19,481 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:19,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:19,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1354477999, now seen corresponding path program 81 times [2021-06-05 23:48:19,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:19,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891165377] [2021-06-05 23:48:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:19,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:19,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891165377] [2021-06-05 23:48:19,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891165377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:19,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357881221] [2021-06-05 23:48:19,709 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 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 23:48:19,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:48:19,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:19,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 23:48:19,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:19,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:19,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 23:48:19,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:19,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:19,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:19,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:61 [2021-06-05 23:48:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:20,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:20,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:20,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-06-05 23:48:20,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:20,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:20,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-06-05 23:48:20,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:20,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:20,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 23:48:20,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:20,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:20,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:48:20,237 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:161, output treesize:62 [2021-06-05 23:48:20,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:20,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:48:20,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:20,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:20,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:20,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:48:20,373 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:48:20,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:20,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:48:20,397 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:74, output treesize:60 [2021-06-05 23:48:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:20,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357881221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:20,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:20,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-05 23:48:20,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770324521] [2021-06-05 23:48:20,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:48:20,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:20,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:48:20,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:48:20,473 INFO L87 Difference]: Start difference. First operand 43305 states and 179471 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:24,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:24,996 INFO L93 Difference]: Finished difference Result 84587 states and 346686 transitions. [2021-06-05 23:48:24,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:48:24,997 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:48:24,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:25,251 INFO L225 Difference]: With dead ends: 84587 [2021-06-05 23:48:25,251 INFO L226 Difference]: Without dead ends: 84505 [2021-06-05 23:48:25,252 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 2797.4ms TimeCoverageRelationStatistics Valid=555, Invalid=4701, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:48:25,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84505 states. [2021-06-05 23:48:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84505 to 43745. [2021-06-05 23:48:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43745 states, 43744 states have (on average 4.1367273226042425) internal successors, (180957), 43744 states have internal predecessors, (180957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43745 states to 43745 states and 180957 transitions. [2021-06-05 23:48:26,424 INFO L78 Accepts]: Start accepts. Automaton has 43745 states and 180957 transitions. Word has length 39 [2021-06-05 23:48:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:26,424 INFO L482 AbstractCegarLoop]: Abstraction has 43745 states and 180957 transitions. [2021-06-05 23:48:26,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:26,424 INFO L276 IsEmpty]: Start isEmpty. Operand 43745 states and 180957 transitions. [2021-06-05 23:48:26,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:48:26,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:26,499 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:26,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable438 [2021-06-05 23:48:26,699 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:26,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1521496273, now seen corresponding path program 82 times [2021-06-05 23:48:26,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:26,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654825383] [2021-06-05 23:48:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:26,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:26,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654825383] [2021-06-05 23:48:26,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654825383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:26,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693648011] [2021-06-05 23:48:26,950 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 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 23:48:26,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:48:26,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:26,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:48:26,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:27,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:48:27,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:27,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:27,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:27,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 23:48:27,217 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:48:27,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:48:27,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:27,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:27,219 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 23:48:27,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:48:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:27,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693648011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:27,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:27,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 23:48:27,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587834038] [2021-06-05 23:48:27,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:48:27,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:27,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:48:27,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:48:27,251 INFO L87 Difference]: Start difference. First operand 43745 states and 180957 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:29,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:29,355 INFO L93 Difference]: Finished difference Result 94187 states and 388377 transitions. [2021-06-05 23:48:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:48:29,355 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:48:29,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:29,628 INFO L225 Difference]: With dead ends: 94187 [2021-06-05 23:48:29,628 INFO L226 Difference]: Without dead ends: 94132 [2021-06-05 23:48:29,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 787.9ms TimeCoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:48:29,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94132 states. [2021-06-05 23:48:30,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94132 to 44373. [2021-06-05 23:48:30,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44373 states, 44372 states have (on average 4.139750292977554) internal successors, (183689), 44372 states have internal predecessors, (183689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:31,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44373 states to 44373 states and 183689 transitions. [2021-06-05 23:48:31,245 INFO L78 Accepts]: Start accepts. Automaton has 44373 states and 183689 transitions. Word has length 39 [2021-06-05 23:48:31,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:31,245 INFO L482 AbstractCegarLoop]: Abstraction has 44373 states and 183689 transitions. [2021-06-05 23:48:31,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:31,245 INFO L276 IsEmpty]: Start isEmpty. Operand 44373 states and 183689 transitions. [2021-06-05 23:48:31,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:48:31,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:31,327 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:31,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:31,527 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:31,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:31,528 INFO L82 PathProgramCache]: Analyzing trace with hash -855789521, now seen corresponding path program 83 times [2021-06-05 23:48:31,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:31,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596565705] [2021-06-05 23:48:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:31,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:31,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596565705] [2021-06-05 23:48:31,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596565705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:31,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528058731] [2021-06-05 23:48:31,755 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 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 23:48:31,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:48:31,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:31,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:48:31,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:32,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:32,022 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 55 [2021-06-05 23:48:32,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:32,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:32,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:48:32,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:196 [2021-06-05 23:48:34,820 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-06-05 23:48:35,403 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2021-06-05 23:48:36,315 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-06-05 23:48:36,512 INFO L446 ElimStorePlain]: Different costs {3=[q2, v_prenex_260, v_prenex_250, v_prenex_240, v_prenex_254, v_prenex_244, v_prenex_256, v_prenex_248], 6=[v_prenex_252, v_prenex_242, v_prenex_246, v_prenex_258, v_prenex_238]} [2021-06-05 23:48:36,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:36,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:36,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:36,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 24 [2021-06-05 23:48:36,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:36,932 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 244 [2021-06-05 23:48:36,932 INFO L628 ElimStorePlain]: treesize reduction 11, result has 98.3 percent of original size [2021-06-05 23:48:36,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:36,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:36,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 23:48:36,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:37,133 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2021-06-05 23:48:37,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:37,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:37,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:37,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 23:48:37,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:37,331 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2021-06-05 23:48:37,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:37,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:37,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:37,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 23:48:37,345 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:37,526 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2021-06-05 23:48:37,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:37,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:37,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:37,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:37,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 23:48:37,539 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:37,709 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2021-06-05 23:48:37,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:37,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:37,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:37,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 24 [2021-06-05 23:48:37,721 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:37,882 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2021-06-05 23:48:37,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:37,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:37,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:37,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:37,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 23:48:37,894 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:38,050 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2021-06-05 23:48:38,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:38,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:38,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:38,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 23:48:38,061 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:38,213 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-05 23:48:38,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:38,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:38,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:38,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:38,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:38,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 23:48:38,226 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:38,433 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 23:48:38,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:38,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:38,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:38,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:38,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:38,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-06-05 23:48:38,444 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:38,583 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-05 23:48:38,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:38,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:38,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:38,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:38,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:38,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 23:48:38,593 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:38,725 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-05 23:48:38,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:38,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:38,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:38,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:38,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:38,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-06-05 23:48:38,751 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:38,881 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 23:48:38,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:38,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:38,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:38,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:38,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:38,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2021-06-05 23:48:38,891 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:39,009 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 23:48:39,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:39,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 26 dim-0 vars, 13 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 23:48:39,019 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 39 variables, input treesize:684, output treesize:263 [2021-06-05 23:48:39,338 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_262, v_prenex_263], 3=[q1, v_prenex_265], 6=[v_prenex_264, v_prenex_266, v_prenex_267]} [2021-06-05 23:48:39,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:39,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:48:39,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:39,554 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2021-06-05 23:48:39,555 INFO L628 ElimStorePlain]: treesize reduction 42, result has 88.2 percent of original size [2021-06-05 23:48:39,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:39,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:48:39,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:39,730 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-06-05 23:48:39,730 INFO L628 ElimStorePlain]: treesize reduction 33, result has 89.1 percent of original size [2021-06-05 23:48:39,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:39,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:39,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 32 [2021-06-05 23:48:39,749 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:39,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:39,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:39,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:39,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 32 [2021-06-05 23:48:39,844 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:39,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:39,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:39,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:39,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:39,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:39,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 45 [2021-06-05 23:48:39,937 INFO L550 ElimStorePlain]: Start of recursive call 6: 2 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:48:40,031 INFO L628 ElimStorePlain]: treesize reduction 88, result has 58.5 percent of original size [2021-06-05 23:48:40,031 INFO L518 ElimStorePlain]: Eliminatee v_prenex_266 vanished before elimination [2021-06-05 23:48:40,031 INFO L518 ElimStorePlain]: Eliminatee v_prenex_267 vanished before elimination [2021-06-05 23:48:40,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 7 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 23:48:40,039 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:367, output treesize:119 [2021-06-05 23:48:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:40,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528058731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:40,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:40,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:48:40,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110227047] [2021-06-05 23:48:40,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:48:40,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:40,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:48:40,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=820, Unknown=1, NotChecked=0, Total=930 [2021-06-05 23:48:40,176 INFO L87 Difference]: Start difference. First operand 44373 states and 183689 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:41,738 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 89 [2021-06-05 23:48:42,265 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 56 [2021-06-05 23:48:42,745 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-06-05 23:48:43,396 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-06-05 23:48:43,734 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 23:48:43,924 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2021-06-05 23:48:46,092 WARN L205 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 256 DAG size of output: 249 [2021-06-05 23:48:47,394 WARN L205 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2021-06-05 23:48:47,606 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-06-05 23:48:47,899 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 23:48:49,377 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-06-05 23:48:50,285 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2021-06-05 23:48:50,616 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2021-06-05 23:48:51,180 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 23:48:52,803 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 223 DAG size of output: 216 [2021-06-05 23:48:53,146 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-05 23:48:54,012 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2021-06-05 23:48:55,254 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 214 DAG size of output: 214 [2021-06-05 23:48:55,873 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-06-05 23:48:56,384 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-06-05 23:48:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:56,782 INFO L93 Difference]: Finished difference Result 73715 states and 299870 transitions. [2021-06-05 23:48:56,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 23:48:56,782 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:48:56,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:56,982 INFO L225 Difference]: With dead ends: 73715 [2021-06-05 23:48:56,983 INFO L226 Difference]: Without dead ends: 73566 [2021-06-05 23:48:56,983 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2553 ImplicationChecksByTransitivity, 17770.3ms TimeCoverageRelationStatistics Valid=1071, Invalid=7118, Unknown=1, NotChecked=0, Total=8190 [2021-06-05 23:48:57,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73566 states. [2021-06-05 23:48:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73566 to 44813. [2021-06-05 23:48:58,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44813 states, 44812 states have (on average 4.13773096492011) internal successors, (185420), 44812 states have internal predecessors, (185420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:58,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44813 states to 44813 states and 185420 transitions. [2021-06-05 23:48:58,128 INFO L78 Accepts]: Start accepts. Automaton has 44813 states and 185420 transitions. Word has length 39 [2021-06-05 23:48:58,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:58,128 INFO L482 AbstractCegarLoop]: Abstraction has 44813 states and 185420 transitions. [2021-06-05 23:48:58,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:58,128 INFO L276 IsEmpty]: Start isEmpty. Operand 44813 states and 185420 transitions. [2021-06-05 23:48:58,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:48:58,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:58,206 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:58,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 23:48:58,407 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:58,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:58,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1950641299, now seen corresponding path program 84 times [2021-06-05 23:48:58,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:58,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148557387] [2021-06-05 23:48:58,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:58,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:58,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148557387] [2021-06-05 23:48:58,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148557387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:58,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842672241] [2021-06-05 23:48:58,657 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 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 23:48:58,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:48:58,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:58,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:48:58,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:58,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:58,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:58,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:48:58,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:58,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:58,970 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 23:48:58,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:31 [2021-06-05 23:48:59,243 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-06-05 23:48:59,251 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:48:59,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 23:48:59,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:59,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:59,256 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 23:48:59,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-06-05 23:48:59,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:59,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:48:59,306 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:48:59,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:59,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:48:59,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:48:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:59,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842672241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:59,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:59,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:48:59,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12844850] [2021-06-05 23:48:59,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:48:59,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:59,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:48:59,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:48:59,376 INFO L87 Difference]: Start difference. First operand 44813 states and 185420 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:02,158 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-06-05 23:49:02,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:02,902 INFO L93 Difference]: Finished difference Result 117265 states and 472560 transitions. [2021-06-05 23:49:02,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:49:02,903 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:02,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:03,253 INFO L225 Difference]: With dead ends: 117265 [2021-06-05 23:49:03,253 INFO L226 Difference]: Without dead ends: 117151 [2021-06-05 23:49:03,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 2611.4ms TimeCoverageRelationStatistics Valid=948, Invalid=4164, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:49:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117151 states. [2021-06-05 23:49:04,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117151 to 44829. [2021-06-05 23:49:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44829 states, 44828 states have (on average 4.140425626840368) internal successors, (185607), 44828 states have internal predecessors, (185607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44829 states to 44829 states and 185607 transitions. [2021-06-05 23:49:05,096 INFO L78 Accepts]: Start accepts. Automaton has 44829 states and 185607 transitions. Word has length 39 [2021-06-05 23:49:05,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:05,097 INFO L482 AbstractCegarLoop]: Abstraction has 44829 states and 185607 transitions. [2021-06-05 23:49:05,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 44829 states and 185607 transitions. [2021-06-05 23:49:05,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:05,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:05,197 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:05,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:05,404 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:05,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:05,405 INFO L82 PathProgramCache]: Analyzing trace with hash 281177201, now seen corresponding path program 85 times [2021-06-05 23:49:05,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:05,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877533269] [2021-06-05 23:49:05,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:05,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:05,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877533269] [2021-06-05 23:49:05,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877533269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:05,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124112522] [2021-06-05 23:49:05,660 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 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 23:49:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:05,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:49:05,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:05,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:49:05,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:05,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:05,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:05,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 23:49:05,906 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:49:05,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:49:05,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:05,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:05,909 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 23:49:05,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:49:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:05,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124112522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:05,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:05,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:49:05,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768891257] [2021-06-05 23:49:05,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:49:05,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:05,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:49:05,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:49:05,950 INFO L87 Difference]: Start difference. First operand 44829 states and 185607 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:08,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:08,032 INFO L93 Difference]: Finished difference Result 88334 states and 362591 transitions. [2021-06-05 23:49:08,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:49:08,032 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:08,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:08,291 INFO L225 Difference]: With dead ends: 88334 [2021-06-05 23:49:08,291 INFO L226 Difference]: Without dead ends: 88279 [2021-06-05 23:49:08,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 845.3ms TimeCoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:49:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88279 states. [2021-06-05 23:49:09,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88279 to 44537. [2021-06-05 23:49:09,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44537 states, 44536 states have (on average 4.1395500269444945) internal successors, (184359), 44536 states have internal predecessors, (184359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:09,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44537 states to 44537 states and 184359 transitions. [2021-06-05 23:49:09,550 INFO L78 Accepts]: Start accepts. Automaton has 44537 states and 184359 transitions. Word has length 39 [2021-06-05 23:49:09,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:09,550 INFO L482 AbstractCegarLoop]: Abstraction has 44537 states and 184359 transitions. [2021-06-05 23:49:09,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:09,550 INFO L276 IsEmpty]: Start isEmpty. Operand 44537 states and 184359 transitions. [2021-06-05 23:49:09,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:09,630 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:09,630 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:09,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable497,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:09,831 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:09,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:09,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2070849197, now seen corresponding path program 86 times [2021-06-05 23:49:09,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:09,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072441061] [2021-06-05 23:49:09,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:10,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:10,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072441061] [2021-06-05 23:49:10,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072441061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:10,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958188115] [2021-06-05 23:49:10,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:49:10,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:49:10,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:10,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:49:10,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:10,411 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:49:10,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 23:49:10,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:10,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:10,418 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 23:49:10,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 23:49:10,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:49:10,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:10,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:10,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:10,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:49:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:10,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958188115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:10,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:10,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:49:10,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909745431] [2021-06-05 23:49:10,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:49:10,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:10,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:49:10,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:49:10,494 INFO L87 Difference]: Start difference. First operand 44537 states and 184359 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:12,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:12,484 INFO L93 Difference]: Finished difference Result 78151 states and 319515 transitions. [2021-06-05 23:49:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:49:12,485 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:12,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:12,704 INFO L225 Difference]: With dead ends: 78151 [2021-06-05 23:49:12,704 INFO L226 Difference]: Without dead ends: 77903 [2021-06-05 23:49:12,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1489.2ms TimeCoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:49:12,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77903 states. [2021-06-05 23:49:13,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77903 to 44867. [2021-06-05 23:49:13,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44867 states, 44866 states have (on average 4.1367405162038065) internal successors, (185599), 44866 states have internal predecessors, (185599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44867 states to 44867 states and 185599 transitions. [2021-06-05 23:49:13,921 INFO L78 Accepts]: Start accepts. Automaton has 44867 states and 185599 transitions. Word has length 39 [2021-06-05 23:49:13,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:13,921 INFO L482 AbstractCegarLoop]: Abstraction has 44867 states and 185599 transitions. [2021-06-05 23:49:13,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:13,922 INFO L276 IsEmpty]: Start isEmpty. Operand 44867 states and 185599 transitions. [2021-06-05 23:49:14,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:14,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:14,003 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:14,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable498,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:14,203 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:14,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:14,204 INFO L82 PathProgramCache]: Analyzing trace with hash -53763145, now seen corresponding path program 87 times [2021-06-05 23:49:14,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:14,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122094526] [2021-06-05 23:49:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:14,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:14,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122094526] [2021-06-05 23:49:14,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122094526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:14,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568834718] [2021-06-05 23:49:14,786 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 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 23:49:14,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:49:14,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:14,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 23:49:14,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:15,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:15,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 23:49:15,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:15,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:15,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:15,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:68 [2021-06-05 23:49:15,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:15,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:15,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 23:49:15,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:15,243 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 23:49:15,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 23:49:15,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:15,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:15,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:15,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-06-05 23:49:15,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:15,272 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 23:49:15,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2021-06-05 23:49:15,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:15,384 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-05 23:49:15,384 INFO L628 ElimStorePlain]: treesize reduction 27, result has 85.7 percent of original size [2021-06-05 23:49:15,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:49:15,389 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:249, output treesize:200 [2021-06-05 23:49:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:15,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568834718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:15,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:15,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-05 23:49:15,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71074254] [2021-06-05 23:49:15,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:49:15,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:15,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:49:15,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:49:15,680 INFO L87 Difference]: Start difference. First operand 44867 states and 185599 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:17,392 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 23:49:18,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:18,959 INFO L93 Difference]: Finished difference Result 84365 states and 341763 transitions. [2021-06-05 23:49:18,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:49:18,959 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:18,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:19,193 INFO L225 Difference]: With dead ends: 84365 [2021-06-05 23:49:19,193 INFO L226 Difference]: Without dead ends: 84075 [2021-06-05 23:49:19,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 2761.2ms TimeCoverageRelationStatistics Valid=744, Invalid=3948, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:49:19,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84075 states. [2021-06-05 23:49:20,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84075 to 44911. [2021-06-05 23:49:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44911 states, 44910 states have (on average 4.13669561344912) internal successors, (185779), 44910 states have internal predecessors, (185779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:20,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44911 states to 44911 states and 185779 transitions. [2021-06-05 23:49:20,380 INFO L78 Accepts]: Start accepts. Automaton has 44911 states and 185779 transitions. Word has length 39 [2021-06-05 23:49:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:20,380 INFO L482 AbstractCegarLoop]: Abstraction has 44911 states and 185779 transitions. [2021-06-05 23:49:20,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:20,380 INFO L276 IsEmpty]: Start isEmpty. Operand 44911 states and 185779 transitions. [2021-06-05 23:49:20,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:20,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:20,461 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:20,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 23:49:20,662 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:20,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:20,662 INFO L82 PathProgramCache]: Analyzing trace with hash 150157601, now seen corresponding path program 88 times [2021-06-05 23:49:20,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:20,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698923845] [2021-06-05 23:49:20,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:21,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:21,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698923845] [2021-06-05 23:49:21,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698923845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:21,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349726947] [2021-06-05 23:49:21,157 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 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 23:49:21,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:49:21,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:21,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:49:21,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:21,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:49:21,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:21,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:21,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:21,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:49:21,423 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:49:21,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:49:21,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:21,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:21,425 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 23:49:21,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:49:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:21,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349726947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:21,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:21,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:49:21,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051850957] [2021-06-05 23:49:21,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:49:21,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:21,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:49:21,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:49:21,468 INFO L87 Difference]: Start difference. First operand 44911 states and 185779 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:23,638 INFO L93 Difference]: Finished difference Result 80951 states and 330773 transitions. [2021-06-05 23:49:23,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:49:23,639 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:23,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:23,862 INFO L225 Difference]: With dead ends: 80951 [2021-06-05 23:49:23,862 INFO L226 Difference]: Without dead ends: 80845 [2021-06-05 23:49:23,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1061.1ms TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:49:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80845 states. [2021-06-05 23:49:24,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80845 to 45037. [2021-06-05 23:49:24,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45037 states, 45036 states have (on average 4.136890487609912) internal successors, (186309), 45036 states have internal predecessors, (186309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:25,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45037 states to 45037 states and 186309 transitions. [2021-06-05 23:49:25,061 INFO L78 Accepts]: Start accepts. Automaton has 45037 states and 186309 transitions. Word has length 39 [2021-06-05 23:49:25,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:25,061 INFO L482 AbstractCegarLoop]: Abstraction has 45037 states and 186309 transitions. [2021-06-05 23:49:25,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:25,061 INFO L276 IsEmpty]: Start isEmpty. Operand 45037 states and 186309 transitions. [2021-06-05 23:49:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:25,144 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:25,144 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:25,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-05 23:49:25,344 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:25,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:25,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1981493855, now seen corresponding path program 89 times [2021-06-05 23:49:25,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:25,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393275478] [2021-06-05 23:49:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:25,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:25,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393275478] [2021-06-05 23:49:25,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393275478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:25,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406127746] [2021-06-05 23:49:25,660 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 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 23:49:25,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:49:25,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:25,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 23:49:25,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:26,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:26,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 23:49:26,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:26,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:26,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:26,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:76 [2021-06-05 23:49:28,214 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_268], 6=[q1, v_prenex_270]} [2021-06-05 23:49:28,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:28,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:28,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2021-06-05 23:49:28,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:28,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:28,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:28,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:28,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:28,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:28,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2021-06-05 23:49:28,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:49:28,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:28,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:28,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:28,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:28,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:28,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-06-05 23:49:28,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 23:49:28,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:28,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 23:49:28,397 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:187, output treesize:101 [2021-06-05 23:49:28,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:28,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:28,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:28,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:28,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 23:49:28,832 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:49:28,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:28,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:49:28,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 23:49:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:28,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406127746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:28,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:28,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:49:28,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989793360] [2021-06-05 23:49:28,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:49:28,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:28,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:49:28,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=849, Unknown=1, NotChecked=0, Total=992 [2021-06-05 23:49:28,894 INFO L87 Difference]: Start difference. First operand 45037 states and 186309 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:30,439 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 76 [2021-06-05 23:49:31,246 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-06-05 23:49:32,176 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-06-05 23:49:37,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:37,094 INFO L93 Difference]: Finished difference Result 119711 states and 484334 transitions. [2021-06-05 23:49:37,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 23:49:37,094 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:37,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:37,465 INFO L225 Difference]: With dead ends: 119711 [2021-06-05 23:49:37,465 INFO L226 Difference]: Without dead ends: 119292 [2021-06-05 23:49:37,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3733 ImplicationChecksByTransitivity, 7781.2ms TimeCoverageRelationStatistics Valid=1622, Invalid=9933, Unknown=1, NotChecked=0, Total=11556 [2021-06-05 23:49:37,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119292 states. [2021-06-05 23:49:38,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119292 to 44830. [2021-06-05 23:49:38,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44830 states, 44829 states have (on average 4.1372772089495635) internal successors, (185470), 44829 states have internal predecessors, (185470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:38,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44830 states to 44830 states and 185470 transitions. [2021-06-05 23:49:38,991 INFO L78 Accepts]: Start accepts. Automaton has 44830 states and 185470 transitions. Word has length 39 [2021-06-05 23:49:38,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:38,991 INFO L482 AbstractCegarLoop]: Abstraction has 44830 states and 185470 transitions. [2021-06-05 23:49:38,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:38,991 INFO L276 IsEmpty]: Start isEmpty. Operand 44830 states and 185470 transitions. [2021-06-05 23:49:39,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:39,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:39,072 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:39,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:39,272 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:39,272 INFO L82 PathProgramCache]: Analyzing trace with hash -564113161, now seen corresponding path program 90 times [2021-06-05 23:49:39,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:39,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991841952] [2021-06-05 23:49:39,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:39,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:39,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:39,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991841952] [2021-06-05 23:49:39,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991841952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:39,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272704169] [2021-06-05 23:49:39,918 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 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 23:49:39,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:49:39,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:39,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 23:49:39,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:40,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:49:40,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:40,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:40,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:40,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:49:40,191 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:49:40,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:49:40,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:40,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:40,194 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 23:49:40,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:49:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:40,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272704169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:40,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:40,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:49:40,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366271806] [2021-06-05 23:49:40,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:49:40,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:40,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:49:40,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:49:40,240 INFO L87 Difference]: Start difference. First operand 44830 states and 185470 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:42,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:42,702 INFO L93 Difference]: Finished difference Result 99220 states and 404491 transitions. [2021-06-05 23:49:42,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:49:42,703 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:42,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:42,997 INFO L225 Difference]: With dead ends: 99220 [2021-06-05 23:49:42,997 INFO L226 Difference]: Without dead ends: 99052 [2021-06-05 23:49:42,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1254.4ms TimeCoverageRelationStatistics Valid=402, Invalid=2354, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:49:43,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99052 states. [2021-06-05 23:49:44,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99052 to 44916. [2021-06-05 23:49:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44916 states, 44915 states have (on average 4.138439274184571) internal successors, (185878), 44915 states have internal predecessors, (185878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:44,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44916 states to 44916 states and 185878 transitions. [2021-06-05 23:49:44,324 INFO L78 Accepts]: Start accepts. Automaton has 44916 states and 185878 transitions. Word has length 39 [2021-06-05 23:49:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:44,324 INFO L482 AbstractCegarLoop]: Abstraction has 44916 states and 185878 transitions. [2021-06-05 23:49:44,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:44,324 INFO L276 IsEmpty]: Start isEmpty. Operand 44916 states and 185878 transitions. [2021-06-05 23:49:44,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:44,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:44,400 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:44,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2021-06-05 23:49:44,600 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:44,601 INFO L82 PathProgramCache]: Analyzing trace with hash -838019273, now seen corresponding path program 91 times [2021-06-05 23:49:44,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:44,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753682748] [2021-06-05 23:49:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:44,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:44,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753682748] [2021-06-05 23:49:44,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753682748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:44,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29114674] [2021-06-05 23:49:44,882 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 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 23:49:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:44,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:49:44,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:45,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:49:45,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:45,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:45,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:45,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:49:45,143 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:49:45,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:49:45,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:45,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:45,145 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 23:49:45,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:49:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:45,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29114674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:45,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:45,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:49:45,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319134858] [2021-06-05 23:49:45,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:49:45,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:45,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:49:45,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:49:45,187 INFO L87 Difference]: Start difference. First operand 44916 states and 185878 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:47,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:47,501 INFO L93 Difference]: Finished difference Result 100872 states and 411383 transitions. [2021-06-05 23:49:47,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:49:47,502 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:47,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:48,068 INFO L225 Difference]: With dead ends: 100872 [2021-06-05 23:49:48,069 INFO L226 Difference]: Without dead ends: 100790 [2021-06-05 23:49:48,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1378.5ms TimeCoverageRelationStatistics Valid=409, Invalid=2041, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:49:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100790 states. [2021-06-05 23:49:49,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100790 to 44850. [2021-06-05 23:49:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44850 states, 44849 states have (on average 4.138241655332338) internal successors, (185596), 44849 states have internal predecessors, (185596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44850 states to 44850 states and 185596 transitions. [2021-06-05 23:49:49,438 INFO L78 Accepts]: Start accepts. Automaton has 44850 states and 185596 transitions. Word has length 39 [2021-06-05 23:49:49,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:49,438 INFO L482 AbstractCegarLoop]: Abstraction has 44850 states and 185596 transitions. [2021-06-05 23:49:49,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:49,438 INFO L276 IsEmpty]: Start isEmpty. Operand 44850 states and 185596 transitions. [2021-06-05 23:49:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:49,516 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:49,517 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:49,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable540,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:49,718 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:49,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:49,718 INFO L82 PathProgramCache]: Analyzing trace with hash -648841051, now seen corresponding path program 92 times [2021-06-05 23:49:49,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:49,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307018965] [2021-06-05 23:49:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:50,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:50,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307018965] [2021-06-05 23:49:50,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307018965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:50,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920283473] [2021-06-05 23:49:50,016 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 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 23:49:50,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:49:50,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:50,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:49:50,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:50,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:49:50,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:50,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:50,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:50,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:49:50,254 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:49:50,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 23:49:50,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:50,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:50,256 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 23:49:50,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 23:49:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:50,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920283473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:50,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:50,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:49:50,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843949247] [2021-06-05 23:49:50,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:49:50,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:50,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:49:50,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:49:50,317 INFO L87 Difference]: Start difference. First operand 44850 states and 185596 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:52,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:52,164 INFO L93 Difference]: Finished difference Result 83406 states and 341091 transitions. [2021-06-05 23:49:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:49:52,164 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:52,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:52,398 INFO L225 Difference]: With dead ends: 83406 [2021-06-05 23:49:52,398 INFO L226 Difference]: Without dead ends: 83316 [2021-06-05 23:49:52,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 996.2ms TimeCoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:49:52,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83316 states. [2021-06-05 23:49:53,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83316 to 44954. [2021-06-05 23:49:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44954 states, 44953 states have (on average 4.138722665895491) internal successors, (186048), 44953 states have internal predecessors, (186048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44954 states to 44954 states and 186048 transitions. [2021-06-05 23:49:53,652 INFO L78 Accepts]: Start accepts. Automaton has 44954 states and 186048 transitions. Word has length 39 [2021-06-05 23:49:53,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:53,652 INFO L482 AbstractCegarLoop]: Abstraction has 44954 states and 186048 transitions. [2021-06-05 23:49:53,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 44954 states and 186048 transitions. [2021-06-05 23:49:53,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:53,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:53,728 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:53,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 23:49:53,929 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash -914563053, now seen corresponding path program 93 times [2021-06-05 23:49:53,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:53,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315969053] [2021-06-05 23:49:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:54,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:54,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315969053] [2021-06-05 23:49:54,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315969053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:54,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367288905] [2021-06-05 23:49:54,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:49:54,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:49:54,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:54,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:49:54,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:54,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:54,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:54,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 23:49:54,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:54,751 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-06-05 23:49:54,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:54,756 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 23:49:54,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:114 [2021-06-05 23:49:54,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:49:54,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:54,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:54,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:54,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:16 [2021-06-05 23:49:54,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:54,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 23:49:54,911 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:54,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:54,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:54,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:3 [2021-06-05 23:49:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:54,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367288905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:54,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:54,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:49:54,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031450382] [2021-06-05 23:49:54,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:49:54,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:54,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:49:54,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:49:54,939 INFO L87 Difference]: Start difference. First operand 44954 states and 186048 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:56,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:56,909 INFO L93 Difference]: Finished difference Result 71409 states and 291853 transitions. [2021-06-05 23:49:56,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:49:56,909 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:56,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:57,318 INFO L225 Difference]: With dead ends: 71409 [2021-06-05 23:49:57,318 INFO L226 Difference]: Without dead ends: 71281 [2021-06-05 23:49:57,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1279.6ms TimeCoverageRelationStatistics Valid=351, Invalid=1719, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:49:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71281 states. [2021-06-05 23:49:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71281 to 45261. [2021-06-05 23:49:58,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45261 states, 45260 states have (on average 4.134843128590367) internal successors, (187143), 45260 states have internal predecessors, (187143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:58,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45261 states to 45261 states and 187143 transitions. [2021-06-05 23:49:58,469 INFO L78 Accepts]: Start accepts. Automaton has 45261 states and 187143 transitions. Word has length 39 [2021-06-05 23:49:58,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:58,469 INFO L482 AbstractCegarLoop]: Abstraction has 45261 states and 187143 transitions. [2021-06-05 23:49:58,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:58,469 INFO L276 IsEmpty]: Start isEmpty. Operand 45261 states and 187143 transitions. [2021-06-05 23:49:58,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:58,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:58,550 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:58,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-05 23:49:58,750 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:58,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1255743205, now seen corresponding path program 94 times [2021-06-05 23:49:58,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:58,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453406688] [2021-06-05 23:49:58,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:59,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:59,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453406688] [2021-06-05 23:49:59,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453406688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:59,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830290760] [2021-06-05 23:49:59,065 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 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 23:49:59,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:49:59,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:59,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:49:59,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:59,285 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:49:59,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 23:49:59,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:59,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:59,292 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 23:49:59,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 23:49:59,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:49:59,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:59,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:59,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:59,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:49:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:59,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830290760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:59,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:59,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:49:59,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048273836] [2021-06-05 23:49:59,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:49:59,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:59,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:49:59,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:49:59,402 INFO L87 Difference]: Start difference. First operand 45261 states and 187143 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:01,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:01,342 INFO L93 Difference]: Finished difference Result 88636 states and 360851 transitions. [2021-06-05 23:50:01,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:50:01,343 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:01,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:01,594 INFO L225 Difference]: With dead ends: 88636 [2021-06-05 23:50:01,594 INFO L226 Difference]: Without dead ends: 88452 [2021-06-05 23:50:01,594 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1111.6ms TimeCoverageRelationStatistics Valid=373, Invalid=1789, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:50:01,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88452 states. [2021-06-05 23:50:02,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88452 to 45006. [2021-06-05 23:50:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45006 states, 45005 states have (on average 4.137984668370181) internal successors, (186230), 45005 states have internal predecessors, (186230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:02,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45006 states to 45006 states and 186230 transitions. [2021-06-05 23:50:02,983 INFO L78 Accepts]: Start accepts. Automaton has 45006 states and 186230 transitions. Word has length 39 [2021-06-05 23:50:02,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:02,983 INFO L482 AbstractCegarLoop]: Abstraction has 45006 states and 186230 transitions. [2021-06-05 23:50:02,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:02,983 INFO L276 IsEmpty]: Start isEmpty. Operand 45006 states and 186230 transitions. [2021-06-05 23:50:03,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:03,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:03,061 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:03,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-06-05 23:50:03,262 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:03,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:03,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1235218985, now seen corresponding path program 95 times [2021-06-05 23:50:03,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:03,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711440516] [2021-06-05 23:50:03,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:03,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:03,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711440516] [2021-06-05 23:50:03,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711440516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:03,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703877837] [2021-06-05 23:50:03,619 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 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 23:50:03,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:50:03,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:03,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:50:03,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:03,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:03,911 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 49 [2021-06-05 23:50:03,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:03,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:03,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:03,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:52 [2021-06-05 23:50:04,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:50:04,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:04,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:04,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:04,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:50:04,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:04,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:04,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:04,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:04,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 23:50:04,344 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:04,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:04,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:04,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 23:50:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:04,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703877837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:04,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:04,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:50:04,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794663134] [2021-06-05 23:50:04,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:50:04,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:04,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:50:04,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:50:04,405 INFO L87 Difference]: Start difference. First operand 45006 states and 186230 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:07,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:07,979 INFO L93 Difference]: Finished difference Result 79241 states and 323769 transitions. [2021-06-05 23:50:07,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:50:07,980 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:07,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:08,207 INFO L225 Difference]: With dead ends: 79241 [2021-06-05 23:50:08,207 INFO L226 Difference]: Without dead ends: 78900 [2021-06-05 23:50:08,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 2885.1ms TimeCoverageRelationStatistics Valid=793, Invalid=4177, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:50:08,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78900 states. [2021-06-05 23:50:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78900 to 45373. [2021-06-05 23:50:09,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45373 states, 45372 states have (on average 4.134466190602134) internal successors, (187589), 45372 states have internal predecessors, (187589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45373 states to 45373 states and 187589 transitions. [2021-06-05 23:50:09,354 INFO L78 Accepts]: Start accepts. Automaton has 45373 states and 187589 transitions. Word has length 39 [2021-06-05 23:50:09,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:09,354 INFO L482 AbstractCegarLoop]: Abstraction has 45373 states and 187589 transitions. [2021-06-05 23:50:09,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:09,354 INFO L276 IsEmpty]: Start isEmpty. Operand 45373 states and 187589 transitions. [2021-06-05 23:50:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:09,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:09,442 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:09,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:09,642 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:09,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:09,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1145435835, now seen corresponding path program 96 times [2021-06-05 23:50:09,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:09,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292285513] [2021-06-05 23:50:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:09,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:09,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292285513] [2021-06-05 23:50:09,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292285513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:09,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249848540] [2021-06-05 23:50:09,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:50:10,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:50:10,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:10,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 23:50:10,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:10,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:10,257 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 49 [2021-06-05 23:50:10,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:10,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:10,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:10,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:55 [2021-06-05 23:50:10,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:50:10,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:10,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 23:50:10,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:10,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:10,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 23:50:10,349 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:25 [2021-06-05 23:50:10,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:10,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 23:50:10,420 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:10,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:10,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:10,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:3 [2021-06-05 23:50:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:10,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249848540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:10,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:10,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:50:10,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849712058] [2021-06-05 23:50:10,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:50:10,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:10,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:50:10,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:50:10,447 INFO L87 Difference]: Start difference. First operand 45373 states and 187589 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:14,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:14,045 INFO L93 Difference]: Finished difference Result 91924 states and 373158 transitions. [2021-06-05 23:50:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:50:14,045 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:14,313 INFO L225 Difference]: With dead ends: 91924 [2021-06-05 23:50:14,314 INFO L226 Difference]: Without dead ends: 91710 [2021-06-05 23:50:14,314 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 2181.4ms TimeCoverageRelationStatistics Valid=636, Invalid=3270, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:50:14,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91710 states. [2021-06-05 23:50:15,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91710 to 45192. [2021-06-05 23:50:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45192 states, 45191 states have (on average 4.136443097076851) internal successors, (186930), 45191 states have internal predecessors, (186930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:15,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45192 states to 45192 states and 186930 transitions. [2021-06-05 23:50:15,626 INFO L78 Accepts]: Start accepts. Automaton has 45192 states and 186930 transitions. Word has length 39 [2021-06-05 23:50:15,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:15,626 INFO L482 AbstractCegarLoop]: Abstraction has 45192 states and 186930 transitions. [2021-06-05 23:50:15,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:15,626 INFO L276 IsEmpty]: Start isEmpty. Operand 45192 states and 186930 transitions. [2021-06-05 23:50:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:15,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:15,705 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:15,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 23:50:15,906 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:15,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:15,906 INFO L82 PathProgramCache]: Analyzing trace with hash 911518271, now seen corresponding path program 97 times [2021-06-05 23:50:15,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:15,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625798192] [2021-06-05 23:50:15,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:16,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:16,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625798192] [2021-06-05 23:50:16,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625798192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:16,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070992910] [2021-06-05 23:50:16,220 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 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 23:50:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:16,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:50:16,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:16,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:50:16,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:16,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:16,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:16,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:50:16,508 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:50:16,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:50:16,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:16,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:16,510 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 23:50:16,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:50:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:16,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070992910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:16,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:16,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:50:16,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991565644] [2021-06-05 23:50:16,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:50:16,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:16,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:50:16,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:50:16,553 INFO L87 Difference]: Start difference. First operand 45192 states and 186930 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:18,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:18,543 INFO L93 Difference]: Finished difference Result 92237 states and 375902 transitions. [2021-06-05 23:50:18,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:50:18,544 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:18,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:18,811 INFO L225 Difference]: With dead ends: 92237 [2021-06-05 23:50:18,811 INFO L226 Difference]: Without dead ends: 92085 [2021-06-05 23:50:18,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1120.1ms TimeCoverageRelationStatistics Valid=399, Invalid=1857, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:50:18,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92085 states. [2021-06-05 23:50:20,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92085 to 45174. [2021-06-05 23:50:20,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45174 states, 45173 states have (on average 4.137294401523033) internal successors, (186894), 45173 states have internal predecessors, (186894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45174 states to 45174 states and 186894 transitions. [2021-06-05 23:50:20,715 INFO L78 Accepts]: Start accepts. Automaton has 45174 states and 186894 transitions. Word has length 39 [2021-06-05 23:50:20,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:20,715 INFO L482 AbstractCegarLoop]: Abstraction has 45174 states and 186894 transitions. [2021-06-05 23:50:20,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:20,715 INFO L276 IsEmpty]: Start isEmpty. Operand 45174 states and 186894 transitions. [2021-06-05 23:50:20,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:20,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:20,801 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:21,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:21,001 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:21,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:21,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1115439017, now seen corresponding path program 98 times [2021-06-05 23:50:21,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:21,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589680091] [2021-06-05 23:50:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:21,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:21,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589680091] [2021-06-05 23:50:21,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589680091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:21,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594039196] [2021-06-05 23:50:21,336 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 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 23:50:21,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:50:21,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:21,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:50:21,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:21,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:50:21,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:21,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:21,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:21,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:50:21,613 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:50:21,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:50:21,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:21,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:21,615 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 23:50:21,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:50:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:21,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594039196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:21,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:21,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:50:21,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498878630] [2021-06-05 23:50:21,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:50:21,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:21,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:50:21,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:50:21,658 INFO L87 Difference]: Start difference. First operand 45174 states and 186894 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:23,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:23,311 INFO L93 Difference]: Finished difference Result 78252 states and 319941 transitions. [2021-06-05 23:50:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:50:23,312 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:23,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:23,533 INFO L225 Difference]: With dead ends: 78252 [2021-06-05 23:50:23,533 INFO L226 Difference]: Without dead ends: 78162 [2021-06-05 23:50:23,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 969.3ms TimeCoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:50:23,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78162 states. [2021-06-05 23:50:24,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78162 to 44982. [2021-06-05 23:50:24,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44982 states, 44981 states have (on average 4.138325070585358) internal successors, (186146), 44981 states have internal predecessors, (186146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44982 states to 44982 states and 186146 transitions. [2021-06-05 23:50:24,764 INFO L78 Accepts]: Start accepts. Automaton has 44982 states and 186146 transitions. Word has length 39 [2021-06-05 23:50:24,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:24,764 INFO L482 AbstractCegarLoop]: Abstraction has 44982 states and 186146 transitions. [2021-06-05 23:50:24,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:24,764 INFO L276 IsEmpty]: Start isEmpty. Operand 44982 states and 186146 transitions. [2021-06-05 23:50:24,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:24,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:24,845 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:25,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:25,061 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:25,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:25,061 INFO L82 PathProgramCache]: Analyzing trace with hash 314529513, now seen corresponding path program 99 times [2021-06-05 23:50:25,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:25,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410462479] [2021-06-05 23:50:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:25,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:25,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410462479] [2021-06-05 23:50:25,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410462479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:25,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720557532] [2021-06-05 23:50:25,400 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 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 23:50:25,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:50:25,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:25,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:50:25,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:25,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:25,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:25,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 23:50:25,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:25,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:25,670 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 23:50:25,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:103 [2021-06-05 23:50:25,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:50:25,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:25,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:25,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:25,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:9 [2021-06-05 23:50:25,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:25,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:50:25,768 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:25,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:25,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:25,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:50:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:25,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720557532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:25,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:25,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:50:25,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221347430] [2021-06-05 23:50:25,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:50:25,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:25,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:50:25,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:50:25,819 INFO L87 Difference]: Start difference. First operand 44982 states and 186146 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:26,858 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-06-05 23:50:28,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:28,889 INFO L93 Difference]: Finished difference Result 75380 states and 307072 transitions. [2021-06-05 23:50:28,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:50:28,889 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:28,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:29,097 INFO L225 Difference]: With dead ends: 75380 [2021-06-05 23:50:29,097 INFO L226 Difference]: Without dead ends: 75039 [2021-06-05 23:50:29,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 2118.8ms TimeCoverageRelationStatistics Valid=574, Invalid=3208, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:50:29,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75039 states. [2021-06-05 23:50:30,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75039 to 45509. [2021-06-05 23:50:30,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45509 states, 45508 states have (on average 4.133361167267294) internal successors, (188101), 45508 states have internal predecessors, (188101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:30,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45509 states to 45509 states and 188101 transitions. [2021-06-05 23:50:30,476 INFO L78 Accepts]: Start accepts. Automaton has 45509 states and 188101 transitions. Word has length 39 [2021-06-05 23:50:30,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:30,477 INFO L482 AbstractCegarLoop]: Abstraction has 45509 states and 188101 transitions. [2021-06-05 23:50:30,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:30,477 INFO L276 IsEmpty]: Start isEmpty. Operand 45509 states and 188101 transitions. [2021-06-05 23:50:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:30,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:30,577 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:30,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:30,777 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:30,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:30,778 INFO L82 PathProgramCache]: Analyzing trace with hash 224746363, now seen corresponding path program 100 times [2021-06-05 23:50:30,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:30,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354656267] [2021-06-05 23:50:30,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:31,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:31,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354656267] [2021-06-05 23:50:31,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354656267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:31,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070008889] [2021-06-05 23:50:31,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:50:31,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:50:31,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:31,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:50:31,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:31,350 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:50:31,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 23:50:31,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:31,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:31,357 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 23:50:31,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 23:50:31,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:50:31,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:31,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:31,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:31,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:50:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:31,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070008889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:31,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:31,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:50:31,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306396858] [2021-06-05 23:50:31,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:50:31,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:31,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:50:31,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:50:31,430 INFO L87 Difference]: Start difference. First operand 45509 states and 188101 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:33,466 INFO L93 Difference]: Finished difference Result 90631 states and 368802 transitions. [2021-06-05 23:50:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:50:33,466 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:33,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:33,721 INFO L225 Difference]: With dead ends: 90631 [2021-06-05 23:50:33,721 INFO L226 Difference]: Without dead ends: 90463 [2021-06-05 23:50:33,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1241.4ms TimeCoverageRelationStatistics Valid=422, Invalid=2128, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:50:33,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90463 states. [2021-06-05 23:50:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90463 to 45312. [2021-06-05 23:50:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45312 states, 45311 states have (on average 4.135552073447949) internal successors, (187386), 45311 states have internal predecessors, (187386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45312 states to 45312 states and 187386 transitions. [2021-06-05 23:50:35,044 INFO L78 Accepts]: Start accepts. Automaton has 45312 states and 187386 transitions. Word has length 39 [2021-06-05 23:50:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:35,044 INFO L482 AbstractCegarLoop]: Abstraction has 45312 states and 187386 transitions. [2021-06-05 23:50:35,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 45312 states and 187386 transitions. [2021-06-05 23:50:35,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:35,121 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:35,121 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:35,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-06-05 23:50:35,322 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:35,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:35,322 INFO L82 PathProgramCache]: Analyzing trace with hash -9171201, now seen corresponding path program 101 times [2021-06-05 23:50:35,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:35,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848801532] [2021-06-05 23:50:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:35,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:35,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848801532] [2021-06-05 23:50:35,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848801532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:35,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977800825] [2021-06-05 23:50:35,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:35,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:50:35,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:35,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:50:35,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:36,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:36,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 23:50:36,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:36,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:36,353 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-06-05 23:50:36,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:36,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:68, output treesize:67 [2021-06-05 23:50:36,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:36,500 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 51 [2021-06-05 23:50:36,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:36,525 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 23:50:36,525 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 37 [2021-06-05 23:50:36,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:36,535 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 23:50:36,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-06-05 23:50:36,536 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:36,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:36,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 23:50:36,601 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:162, output treesize:86 [2021-06-05 23:50:36,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:36,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-06-05 23:50:36,722 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:36,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:36,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:36,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-06-05 23:50:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:36,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977800825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:36,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:36,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:50:36,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863218383] [2021-06-05 23:50:36,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:50:36,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:36,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:50:36,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:50:36,779 INFO L87 Difference]: Start difference. First operand 45312 states and 187386 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:43,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:43,176 INFO L93 Difference]: Finished difference Result 112135 states and 454034 transitions. [2021-06-05 23:50:43,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 23:50:43,176 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:43,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:43,502 INFO L225 Difference]: With dead ends: 112135 [2021-06-05 23:50:43,502 INFO L226 Difference]: Without dead ends: 111652 [2021-06-05 23:50:43,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3092 ImplicationChecksByTransitivity, 4397.8ms TimeCoverageRelationStatistics Valid=1325, Invalid=8377, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 23:50:43,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111652 states. [2021-06-05 23:50:44,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111652 to 45461. [2021-06-05 23:50:44,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45461 states, 45460 states have (on average 4.1344258688957325) internal successors, (187951), 45460 states have internal predecessors, (187951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:44,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45461 states to 45461 states and 187951 transitions. [2021-06-05 23:50:44,930 INFO L78 Accepts]: Start accepts. Automaton has 45461 states and 187951 transitions. Word has length 39 [2021-06-05 23:50:44,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:44,930 INFO L482 AbstractCegarLoop]: Abstraction has 45461 states and 187951 transitions. [2021-06-05 23:50:44,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:44,930 INFO L276 IsEmpty]: Start isEmpty. Operand 45461 states and 187951 transitions. [2021-06-05 23:50:45,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:45,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:45,009 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:45,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 23:50:45,217 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:45,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:45,217 INFO L82 PathProgramCache]: Analyzing trace with hash 194749545, now seen corresponding path program 102 times [2021-06-05 23:50:45,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:45,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218844659] [2021-06-05 23:50:45,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:45,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:45,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218844659] [2021-06-05 23:50:45,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218844659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:45,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111924973] [2021-06-05 23:50:45,544 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 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 23:50:45,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:50:45,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:45,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 23:50:45,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:45,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:50:45,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:45,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:45,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:45,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:42 [2021-06-05 23:50:45,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:45,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:45,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 23:50:45,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:45,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:45,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:45,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:9 [2021-06-05 23:50:45,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:45,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:50:45,882 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:45,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:45,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:45,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:50:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:45,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111924973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:45,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:45,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:50:45,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756757017] [2021-06-05 23:50:45,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:50:45,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:45,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:50:46,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:50:46,209 INFO L87 Difference]: Start difference. First operand 45461 states and 187951 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:48,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:48,381 INFO L93 Difference]: Finished difference Result 77469 states and 315626 transitions. [2021-06-05 23:50:48,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:50:48,382 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:48,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:48,823 INFO L225 Difference]: With dead ends: 77469 [2021-06-05 23:50:48,823 INFO L226 Difference]: Without dead ends: 77289 [2021-06-05 23:50:48,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1585.9ms TimeCoverageRelationStatistics Valid=536, Invalid=2544, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:50:48,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77289 states. [2021-06-05 23:50:49,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77289 to 45748. [2021-06-05 23:50:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45748 states, 45747 states have (on average 4.132686296369161) internal successors, (189058), 45747 states have internal predecessors, (189058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45748 states to 45748 states and 189058 transitions. [2021-06-05 23:50:50,014 INFO L78 Accepts]: Start accepts. Automaton has 45748 states and 189058 transitions. Word has length 39 [2021-06-05 23:50:50,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:50,014 INFO L482 AbstractCegarLoop]: Abstraction has 45748 states and 189058 transitions. [2021-06-05 23:50:50,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:50,014 INFO L276 IsEmpty]: Start isEmpty. Operand 45748 states and 189058 transitions. [2021-06-05 23:50:50,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:50,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:50,094 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:50,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-06-05 23:50:50,295 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:50,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:50,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1403012379, now seen corresponding path program 103 times [2021-06-05 23:50:50,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:50,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784234402] [2021-06-05 23:50:50,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:50,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:50,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784234402] [2021-06-05 23:50:50,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784234402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:50,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429792355] [2021-06-05 23:50:50,612 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 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 23:50:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:50,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:50:50,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:50,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:50:50,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:50,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:50,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:50,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:50:50,878 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:50:50,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:50:50,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:50,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:50,880 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 23:50:50,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:50:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:50,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429792355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:50,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:50,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:50:50,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504400375] [2021-06-05 23:50:50,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:50:50,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:50,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:50:50,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:50:50,921 INFO L87 Difference]: Start difference. First operand 45748 states and 189058 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:53,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:53,388 INFO L93 Difference]: Finished difference Result 107489 states and 436848 transitions. [2021-06-05 23:50:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:50:53,392 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:53,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:53,715 INFO L225 Difference]: With dead ends: 107489 [2021-06-05 23:50:53,716 INFO L226 Difference]: Without dead ends: 107353 [2021-06-05 23:50:53,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1330.9ms TimeCoverageRelationStatistics Valid=502, Invalid=2468, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:50:53,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107353 states. [2021-06-05 23:50:55,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107353 to 45307. [2021-06-05 23:50:55,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45307 states, 45306 states have (on average 4.135633249459233) internal successors, (187369), 45306 states have internal predecessors, (187369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:55,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45307 states to 45307 states and 187369 transitions. [2021-06-05 23:50:55,507 INFO L78 Accepts]: Start accepts. Automaton has 45307 states and 187369 transitions. Word has length 39 [2021-06-05 23:50:55,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:55,507 INFO L482 AbstractCegarLoop]: Abstraction has 45307 states and 187369 transitions. [2021-06-05 23:50:55,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:55,508 INFO L276 IsEmpty]: Start isEmpty. Operand 45307 states and 187369 transitions. [2021-06-05 23:50:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:55,594 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:55,594 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:55,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable598,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:55,795 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:55,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:55,795 INFO L82 PathProgramCache]: Analyzing trace with hash -435644929, now seen corresponding path program 104 times [2021-06-05 23:50:55,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:55,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873245444] [2021-06-05 23:50:55,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:56,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:56,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873245444] [2021-06-05 23:50:56,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873245444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:56,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12860064] [2021-06-05 23:50:56,099 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 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 23:50:56,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:50:56,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:56,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:50:56,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:56,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:50:56,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:56,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:56,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:56,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:50:56,372 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:50:56,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:50:56,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:56,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:56,374 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 23:50:56,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:50:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:56,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12860064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:56,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:56,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:50:56,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550111830] [2021-06-05 23:50:56,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:50:56,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:56,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:50:56,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:50:56,415 INFO L87 Difference]: Start difference. First operand 45307 states and 187369 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:58,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:58,417 INFO L93 Difference]: Finished difference Result 96567 states and 393752 transitions. [2021-06-05 23:50:58,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:50:58,417 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:58,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:58,693 INFO L225 Difference]: With dead ends: 96567 [2021-06-05 23:50:58,693 INFO L226 Difference]: Without dead ends: 96415 [2021-06-05 23:50:58,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1048.0ms TimeCoverageRelationStatistics Valid=367, Invalid=1889, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:50:58,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96415 states. [2021-06-05 23:50:59,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96415 to 45393. [2021-06-05 23:50:59,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45393 states, 45392 states have (on average 4.136786217835742) internal successors, (187777), 45392 states have internal predecessors, (187777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45393 states to 45393 states and 187777 transitions. [2021-06-05 23:51:00,050 INFO L78 Accepts]: Start accepts. Automaton has 45393 states and 187777 transitions. Word has length 39 [2021-06-05 23:51:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:00,050 INFO L482 AbstractCegarLoop]: Abstraction has 45393 states and 187777 transitions. [2021-06-05 23:51:00,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:00,051 INFO L276 IsEmpty]: Start isEmpty. Operand 45393 states and 187777 transitions. [2021-06-05 23:51:00,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:00,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:00,128 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:00,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-06-05 23:51:00,328 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:00,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:00,328 INFO L82 PathProgramCache]: Analyzing trace with hash -709551041, now seen corresponding path program 105 times [2021-06-05 23:51:00,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:00,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881418735] [2021-06-05 23:51:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:00,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:00,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881418735] [2021-06-05 23:51:00,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881418735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:00,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853152821] [2021-06-05 23:51:00,621 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 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 23:51:00,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:51:00,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:00,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:51:00,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:00,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:51:00,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:00,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:00,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:51:00,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:28 [2021-06-05 23:51:00,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:00,932 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-06-05 23:51:00,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:00,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:00,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:00,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:25 [2021-06-05 23:51:00,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:00,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:51:00,991 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:01,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:01,236 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-06-05 23:51:01,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:01,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:33 [2021-06-05 23:51:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:01,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853152821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:01,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:01,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:51:01,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134755495] [2021-06-05 23:51:01,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:51:01,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:01,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:51:01,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:51:01,323 INFO L87 Difference]: Start difference. First operand 45393 states and 187777 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:06,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:06,012 INFO L93 Difference]: Finished difference Result 132985 states and 543840 transitions. [2021-06-05 23:51:06,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 23:51:06,012 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:51:06,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:06,415 INFO L225 Difference]: With dead ends: 132985 [2021-06-05 23:51:06,415 INFO L226 Difference]: Without dead ends: 132732 [2021-06-05 23:51:06,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2371 ImplicationChecksByTransitivity, 3091.6ms TimeCoverageRelationStatistics Valid=1186, Invalid=6124, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 23:51:06,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132732 states. [2021-06-05 23:51:08,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132732 to 45733. [2021-06-05 23:51:08,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45733 states, 45732 states have (on average 4.137321787807225) internal successors, (189208), 45732 states have internal predecessors, (189208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45733 states to 45733 states and 189208 transitions. [2021-06-05 23:51:08,286 INFO L78 Accepts]: Start accepts. Automaton has 45733 states and 189208 transitions. Word has length 39 [2021-06-05 23:51:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:08,286 INFO L482 AbstractCegarLoop]: Abstraction has 45733 states and 189208 transitions. [2021-06-05 23:51:08,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 45733 states and 189208 transitions. [2021-06-05 23:51:08,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:08,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:08,363 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:08,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:08,563 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:08,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:08,563 INFO L82 PathProgramCache]: Analyzing trace with hash 39545235, now seen corresponding path program 106 times [2021-06-05 23:51:08,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:08,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469771315] [2021-06-05 23:51:08,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:08,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:08,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469771315] [2021-06-05 23:51:08,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469771315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:08,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072565161] [2021-06-05 23:51:08,856 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 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 23:51:08,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:51:08,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:08,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:51:08,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:09,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:51:09,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:09,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:09,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:09,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:51:09,120 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:51:09,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:51:09,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:09,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:09,123 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 23:51:09,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:51:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:09,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072565161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:09,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:09,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 23:51:09,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038988159] [2021-06-05 23:51:09,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:51:09,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:09,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:51:09,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:51:09,158 INFO L87 Difference]: Start difference. First operand 45733 states and 189208 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:10,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:10,832 INFO L93 Difference]: Finished difference Result 84301 states and 345147 transitions. [2021-06-05 23:51:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:51:10,832 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:51:10,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:11,065 INFO L225 Difference]: With dead ends: 84301 [2021-06-05 23:51:11,066 INFO L226 Difference]: Without dead ends: 84227 [2021-06-05 23:51:11,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 846.4ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:51:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84227 states. [2021-06-05 23:51:12,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84227 to 45327. [2021-06-05 23:51:12,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45327 states, 45326 states have (on average 4.136588271632176) internal successors, (187495), 45326 states have internal predecessors, (187495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:12,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45327 states to 45327 states and 187495 transitions. [2021-06-05 23:51:12,340 INFO L78 Accepts]: Start accepts. Automaton has 45327 states and 187495 transitions. Word has length 39 [2021-06-05 23:51:12,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:12,340 INFO L482 AbstractCegarLoop]: Abstraction has 45327 states and 187495 transitions. [2021-06-05 23:51:12,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:12,340 INFO L276 IsEmpty]: Start isEmpty. Operand 45327 states and 187495 transitions. [2021-06-05 23:51:12,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:12,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:12,418 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:12,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:12,619 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:12,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:12,619 INFO L82 PathProgramCache]: Analyzing trace with hash -520372819, now seen corresponding path program 107 times [2021-06-05 23:51:12,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:12,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987102575] [2021-06-05 23:51:12,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:12,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:12,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987102575] [2021-06-05 23:51:12,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987102575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:12,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832423589] [2021-06-05 23:51:12,915 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 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 23:51:12,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:51:12,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:12,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 23:51:12,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:13,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:13,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 23:51:13,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:13,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:13,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:51:13,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:70 [2021-06-05 23:51:13,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:13,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:13,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:13,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:13,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 54 [2021-06-05 23:51:13,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:51:13,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:13,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:13,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:13,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 24 [2021-06-05 23:51:13,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:13,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:13,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:13,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 23:51:13,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:13,691 INFO L628 ElimStorePlain]: treesize reduction 41, result has 71.1 percent of original size [2021-06-05 23:51:13,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:51:13,709 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:163, output treesize:67 [2021-06-05 23:51:13,826 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_272], 6=[q1]} [2021-06-05 23:51:13,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:13,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:51:13,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:13,875 INFO L628 ElimStorePlain]: treesize reduction 15, result has 82.6 percent of original size [2021-06-05 23:51:13,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:13,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:13,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:13,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:13,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-06-05 23:51:13,894 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:13,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:13,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:51:13,918 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:97, output treesize:60 [2021-06-05 23:51:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:14,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832423589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:14,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:14,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:51:14,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215282785] [2021-06-05 23:51:14,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:51:14,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:14,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:51:14,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:51:14,019 INFO L87 Difference]: Start difference. First operand 45327 states and 187495 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:15,824 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 23:51:15,975 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-05 23:51:16,303 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-06-05 23:51:16,642 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 23:51:17,680 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2021-06-05 23:51:18,402 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-05 23:51:19,784 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-06-05 23:51:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:23,581 INFO L93 Difference]: Finished difference Result 90402 states and 367723 transitions. [2021-06-05 23:51:23,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 23:51:23,581 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:51:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:23,827 INFO L225 Difference]: With dead ends: 90402 [2021-06-05 23:51:23,827 INFO L226 Difference]: Without dead ends: 90145 [2021-06-05 23:51:23,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3917 ImplicationChecksByTransitivity, 6217.7ms TimeCoverageRelationStatistics Valid=1597, Invalid=10175, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 23:51:23,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90145 states. [2021-06-05 23:51:24,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90145 to 45558. [2021-06-05 23:51:24,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45558 states, 45557 states have (on average 4.135478631165353) internal successors, (188400), 45557 states have internal predecessors, (188400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:25,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45558 states to 45558 states and 188400 transitions. [2021-06-05 23:51:25,087 INFO L78 Accepts]: Start accepts. Automaton has 45558 states and 188400 transitions. Word has length 39 [2021-06-05 23:51:25,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:25,087 INFO L482 AbstractCegarLoop]: Abstraction has 45558 states and 188400 transitions. [2021-06-05 23:51:25,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:25,087 INFO L276 IsEmpty]: Start isEmpty. Operand 45558 states and 188400 transitions. [2021-06-05 23:51:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:25,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:25,168 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:25,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:25,368 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:25,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:25,369 INFO L82 PathProgramCache]: Analyzing trace with hash 116898119, now seen corresponding path program 108 times [2021-06-05 23:51:25,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:25,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779761501] [2021-06-05 23:51:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:25,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:25,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779761501] [2021-06-05 23:51:25,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779761501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:25,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432413620] [2021-06-05 23:51:25,864 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 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 23:51:25,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:51:25,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:25,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 23:51:25,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:26,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:51:26,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:26,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:26,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:26,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:51:26,111 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:51:26,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 23:51:26,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:26,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:26,113 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 23:51:26,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 23:51:26,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:26,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:51:26,160 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:26,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:26,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:26,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:51:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:26,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432413620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:26,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:26,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:51:26,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989698509] [2021-06-05 23:51:26,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:51:26,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:26,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:51:26,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:51:26,213 INFO L87 Difference]: Start difference. First operand 45558 states and 188400 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:28,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:28,757 INFO L93 Difference]: Finished difference Result 95560 states and 387294 transitions. [2021-06-05 23:51:28,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:51:28,758 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:51:28,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:29,042 INFO L225 Difference]: With dead ends: 95560 [2021-06-05 23:51:29,042 INFO L226 Difference]: Without dead ends: 95369 [2021-06-05 23:51:29,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1708.3ms TimeCoverageRelationStatistics Valid=484, Invalid=2822, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:51:29,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95369 states. [2021-06-05 23:51:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95369 to 45353. [2021-06-05 23:51:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45353 states, 45352 states have (on average 4.137700652672429) internal successors, (187653), 45352 states have internal predecessors, (187653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45353 states to 45353 states and 187653 transitions. [2021-06-05 23:51:30,414 INFO L78 Accepts]: Start accepts. Automaton has 45353 states and 187653 transitions. Word has length 39 [2021-06-05 23:51:30,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:30,414 INFO L482 AbstractCegarLoop]: Abstraction has 45353 states and 187653 transitions. [2021-06-05 23:51:30,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:30,414 INFO L276 IsEmpty]: Start isEmpty. Operand 45353 states and 187653 transitions. [2021-06-05 23:51:30,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:30,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:30,492 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:30,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable628 [2021-06-05 23:51:30,693 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1040958189, now seen corresponding path program 109 times [2021-06-05 23:51:30,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:30,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723407786] [2021-06-05 23:51:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:30,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:30,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723407786] [2021-06-05 23:51:30,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723407786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:30,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828006948] [2021-06-05 23:51:30,942 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 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 23:51:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:30,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:51:30,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:31,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:51:31,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:31,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:31,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:31,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:51:31,202 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:51:31,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:51:31,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:31,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:31,204 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 23:51:31,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:51:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:31,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828006948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:31,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:31,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:51:31,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242643790] [2021-06-05 23:51:31,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:51:31,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:31,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:51:31,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:51:31,244 INFO L87 Difference]: Start difference. First operand 45353 states and 187653 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:33,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:33,500 INFO L93 Difference]: Finished difference Result 117587 states and 478149 transitions. [2021-06-05 23:51:33,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:51:33,501 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:51:33,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:34,160 INFO L225 Difference]: With dead ends: 117587 [2021-06-05 23:51:34,160 INFO L226 Difference]: Without dead ends: 117532 [2021-06-05 23:51:34,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1368.4ms TimeCoverageRelationStatistics Valid=418, Invalid=2032, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:51:34,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117532 states. [2021-06-05 23:51:35,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117532 to 44455. [2021-06-05 23:51:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44455 states, 44454 states have (on average 4.1342736311692985) internal successors, (183785), 44454 states have internal predecessors, (183785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44455 states to 44455 states and 183785 transitions. [2021-06-05 23:51:35,613 INFO L78 Accepts]: Start accepts. Automaton has 44455 states and 183785 transitions. Word has length 39 [2021-06-05 23:51:35,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:35,613 INFO L482 AbstractCegarLoop]: Abstraction has 44455 states and 183785 transitions. [2021-06-05 23:51:35,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 44455 states and 183785 transitions. [2021-06-05 23:51:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:35,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:35,689 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:35,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 23:51:35,890 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:35,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1160485695, now seen corresponding path program 110 times [2021-06-05 23:51:35,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:35,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508439491] [2021-06-05 23:51:35,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:36,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:36,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508439491] [2021-06-05 23:51:36,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508439491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:36,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172191824] [2021-06-05 23:51:36,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:51:36,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:51:36,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:36,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 23:51:36,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:36,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:36,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 23:51:36,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:36,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:36,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:36,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:51 [2021-06-05 23:51:36,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:36,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 23:51:36,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:36,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:36,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 23:51:36,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:36,485 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:51:36,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 23:51:36,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:36,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:36,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:51:36,499 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:108, output treesize:43 [2021-06-05 23:51:36,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:36,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:51:36,604 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:36,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:36,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:36,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:51:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:36,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172191824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:36,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:36,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:51:36,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177984080] [2021-06-05 23:51:36,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:51:36,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:36,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:51:36,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:51:36,653 INFO L87 Difference]: Start difference. First operand 44455 states and 183785 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:37,716 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2021-06-05 23:51:38,293 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-05 23:51:38,878 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-05 23:51:41,135 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-06-05 23:51:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:42,324 INFO L93 Difference]: Finished difference Result 111995 states and 451742 transitions. [2021-06-05 23:51:42,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 23:51:42,324 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:51:42,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:42,673 INFO L225 Difference]: With dead ends: 111995 [2021-06-05 23:51:42,673 INFO L226 Difference]: Without dead ends: 111956 [2021-06-05 23:51:42,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2253 ImplicationChecksByTransitivity, 4225.2ms TimeCoverageRelationStatistics Valid=1129, Invalid=6011, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 23:51:42,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111956 states. [2021-06-05 23:51:43,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111956 to 44397. [2021-06-05 23:51:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44397 states, 44396 states have (on average 4.132782232633571) internal successors, (183479), 44396 states have internal predecessors, (183479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:44,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44397 states to 44397 states and 183479 transitions. [2021-06-05 23:51:44,490 INFO L78 Accepts]: Start accepts. Automaton has 44397 states and 183479 transitions. Word has length 39 [2021-06-05 23:51:44,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:44,490 INFO L482 AbstractCegarLoop]: Abstraction has 44397 states and 183479 transitions. [2021-06-05 23:51:44,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 44397 states and 183479 transitions. [2021-06-05 23:51:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:44,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:44,593 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:44,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 23:51:44,793 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:44,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:44,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1988991611, now seen corresponding path program 111 times [2021-06-05 23:51:44,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:44,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799295571] [2021-06-05 23:51:44,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:45,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:45,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799295571] [2021-06-05 23:51:45,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799295571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:45,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463099493] [2021-06-05 23:51:45,032 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 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 23:51:45,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:51:45,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:45,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:51:45,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:45,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:51:45,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:45,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:45,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:45,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-06-05 23:51:45,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:45,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:45,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2021-06-05 23:51:45,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:45,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:45,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:51:45,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:83 [2021-06-05 23:51:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:45,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463099493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:45,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:45,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 23:51:45,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906066102] [2021-06-05 23:51:45,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:51:45,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:45,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:51:45,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:51:45,367 INFO L87 Difference]: Start difference. First operand 44397 states and 183479 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:47,481 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-06-05 23:51:47,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:47,961 INFO L93 Difference]: Finished difference Result 97210 states and 394835 transitions. [2021-06-05 23:51:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:51:47,962 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:51:47,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:48,251 INFO L225 Difference]: With dead ends: 97210 [2021-06-05 23:51:48,251 INFO L226 Difference]: Without dead ends: 97155 [2021-06-05 23:51:48,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1521.7ms TimeCoverageRelationStatistics Valid=442, Invalid=2750, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:51:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97155 states. [2021-06-05 23:51:49,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97155 to 45104. [2021-06-05 23:51:49,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45104 states, 45103 states have (on average 4.140966232844822) internal successors, (186770), 45103 states have internal predecessors, (186770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45104 states to 45104 states and 186770 transitions. [2021-06-05 23:51:49,648 INFO L78 Accepts]: Start accepts. Automaton has 45104 states and 186770 transitions. Word has length 39 [2021-06-05 23:51:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:49,648 INFO L482 AbstractCegarLoop]: Abstraction has 45104 states and 186770 transitions. [2021-06-05 23:51:49,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 45104 states and 186770 transitions. [2021-06-05 23:51:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:49,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:49,730 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:49,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:49,930 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:49,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:49,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1227178289, now seen corresponding path program 112 times [2021-06-05 23:51:49,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:49,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279662350] [2021-06-05 23:51:49,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:50,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:50,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279662350] [2021-06-05 23:51:50,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279662350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:50,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387320428] [2021-06-05 23:51:50,170 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 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 23:51:50,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:51:50,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:50,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:51:50,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:50,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:51:50,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:50,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:50,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:50,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 23:51:50,392 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:51:50,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 23:51:50,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:50,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:50,394 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 23:51:50,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 23:51:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:50,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387320428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:50,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:50,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:51:50,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986397585] [2021-06-05 23:51:50,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:51:50,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:50,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:51:50,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:51:50,452 INFO L87 Difference]: Start difference. First operand 45104 states and 186770 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:50,873 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-06-05 23:51:52,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:52,355 INFO L93 Difference]: Finished difference Result 84712 states and 348272 transitions. [2021-06-05 23:51:52,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:51:52,355 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:51:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:52,600 INFO L225 Difference]: With dead ends: 84712 [2021-06-05 23:51:52,601 INFO L226 Difference]: Without dead ends: 84657 [2021-06-05 23:51:52,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1019.7ms TimeCoverageRelationStatistics Valid=298, Invalid=1342, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:51:52,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84657 states. [2021-06-05 23:51:53,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84657 to 44269. [2021-06-05 23:51:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44269 states, 44268 states have (on average 4.134386012469504) internal successors, (183021), 44268 states have internal predecessors, (183021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44269 states to 44269 states and 183021 transitions. [2021-06-05 23:51:53,879 INFO L78 Accepts]: Start accepts. Automaton has 44269 states and 183021 transitions. Word has length 39 [2021-06-05 23:51:53,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:53,879 INFO L482 AbstractCegarLoop]: Abstraction has 44269 states and 183021 transitions. [2021-06-05 23:51:53,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:53,879 INFO L276 IsEmpty]: Start isEmpty. Operand 44269 states and 183021 transitions. [2021-06-05 23:51:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:54,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:54,234 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:54,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-06-05 23:51:54,441 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:54,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:54,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1103043159, now seen corresponding path program 113 times [2021-06-05 23:51:54,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:54,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748639322] [2021-06-05 23:51:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:54,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:54,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748639322] [2021-06-05 23:51:54,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748639322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:54,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945700715] [2021-06-05 23:51:54,698 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 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 23:51:54,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:51:54,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:54,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:51:54,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:54,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:54,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 23:51:54,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:54,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:54,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:54,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:19 [2021-06-05 23:51:54,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:51:54,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:54,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:54,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:54,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 23:51:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:55,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945700715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:55,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:55,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 23:51:55,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194979884] [2021-06-05 23:51:55,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:51:55,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:55,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:51:55,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:51:55,025 INFO L87 Difference]: Start difference. First operand 44269 states and 183021 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 23:51:57,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:57,246 INFO L93 Difference]: Finished difference Result 80110 states and 326755 transitions. [2021-06-05 23:51:57,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:51:57,246 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) Word has length 39 [2021-06-05 23:51:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:57,475 INFO L225 Difference]: With dead ends: 80110 [2021-06-05 23:51:57,475 INFO L226 Difference]: Without dead ends: 80029 [2021-06-05 23:51:57,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 980.9ms TimeCoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:51:57,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80029 states. [2021-06-05 23:51:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80029 to 44878. [2021-06-05 23:51:58,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44878 states, 44877 states have (on average 4.1345901018339015) internal successors, (185548), 44877 states have internal predecessors, (185548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:58,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44878 states to 44878 states and 185548 transitions. [2021-06-05 23:51:58,728 INFO L78 Accepts]: Start accepts. Automaton has 44878 states and 185548 transitions. Word has length 39 [2021-06-05 23:51:58,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:58,728 INFO L482 AbstractCegarLoop]: Abstraction has 44878 states and 185548 transitions. [2021-06-05 23:51:58,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 23:51:58,729 INFO L276 IsEmpty]: Start isEmpty. Operand 44878 states and 185548 transitions. [2021-06-05 23:51:58,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:58,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:58,809 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:59,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:59,009 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:59,009 INFO L82 PathProgramCache]: Analyzing trace with hash 831476315, now seen corresponding path program 114 times [2021-06-05 23:51:59,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:59,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922010018] [2021-06-05 23:51:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:59,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:59,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922010018] [2021-06-05 23:51:59,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922010018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:59,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001185626] [2021-06-05 23:51:59,305 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 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 23:51:59,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:51:59,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:59,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:51:59,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:59,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:59,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:59,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2021-06-05 23:51:59,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:59,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:59,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:59,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:29 [2021-06-05 23:51:59,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:59,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:59,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:59,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:59,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:59,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 37 [2021-06-05 23:51:59,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:51:59,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:59,839 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 23:51:59,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:27 [2021-06-05 23:51:59,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:59,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:51:59,898 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:59,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:59,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:59,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:39 [2021-06-05 23:52:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:00,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001185626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:00,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:00,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-05 23:52:00,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206859413] [2021-06-05 23:52:00,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:52:00,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:00,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:52:00,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:52:00,052 INFO L87 Difference]: Start difference. First operand 44878 states and 185548 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:00,669 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-06-05 23:52:03,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:03,926 INFO L93 Difference]: Finished difference Result 69512 states and 282267 transitions. [2021-06-05 23:52:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:52:03,926 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:04,121 INFO L225 Difference]: With dead ends: 69512 [2021-06-05 23:52:04,122 INFO L226 Difference]: Without dead ends: 69280 [2021-06-05 23:52:04,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 2720.3ms TimeCoverageRelationStatistics Valid=677, Invalid=4015, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:52:04,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69280 states. [2021-06-05 23:52:05,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69280 to 45307. [2021-06-05 23:52:05,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45307 states, 45306 states have (on average 4.127753498432878) internal successors, (187012), 45306 states have internal predecessors, (187012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45307 states to 45307 states and 187012 transitions. [2021-06-05 23:52:05,262 INFO L78 Accepts]: Start accepts. Automaton has 45307 states and 187012 transitions. Word has length 39 [2021-06-05 23:52:05,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:05,262 INFO L482 AbstractCegarLoop]: Abstraction has 45307 states and 187012 transitions. [2021-06-05 23:52:05,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:05,262 INFO L276 IsEmpty]: Start isEmpty. Operand 45307 states and 187012 transitions. [2021-06-05 23:52:05,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:05,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:05,343 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:05,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable644,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:05,543 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:05,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:05,544 INFO L82 PathProgramCache]: Analyzing trace with hash -850360595, now seen corresponding path program 115 times [2021-06-05 23:52:05,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:05,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034824437] [2021-06-05 23:52:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:05,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:05,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034824437] [2021-06-05 23:52:05,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034824437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:05,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529618521] [2021-06-05 23:52:05,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:52:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:05,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:52:05,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:05,990 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:52:05,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:52:05,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:05,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:05,995 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 23:52:05,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 23:52:06,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:52:06,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:06,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:06,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:06,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:52:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:06,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529618521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:06,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:06,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:52:06,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657259247] [2021-06-05 23:52:06,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:52:06,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:06,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:52:06,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:52:06,150 INFO L87 Difference]: Start difference. First operand 45307 states and 187012 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:08,644 INFO L93 Difference]: Finished difference Result 90955 states and 367640 transitions. [2021-06-05 23:52:08,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:52:08,644 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:08,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:08,902 INFO L225 Difference]: With dead ends: 90955 [2021-06-05 23:52:08,903 INFO L226 Difference]: Without dead ends: 90592 [2021-06-05 23:52:08,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1430.2ms TimeCoverageRelationStatistics Valid=495, Invalid=2697, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:52:09,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90592 states. [2021-06-05 23:52:10,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90592 to 44829. [2021-06-05 23:52:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44829 states, 44828 states have (on average 4.1365441242080845) internal successors, (185433), 44828 states have internal predecessors, (185433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44829 states to 44829 states and 185433 transitions. [2021-06-05 23:52:10,443 INFO L78 Accepts]: Start accepts. Automaton has 44829 states and 185433 transitions. Word has length 39 [2021-06-05 23:52:10,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:10,443 INFO L482 AbstractCegarLoop]: Abstraction has 44829 states and 185433 transitions. [2021-06-05 23:52:10,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:10,443 INFO L276 IsEmpty]: Start isEmpty. Operand 44829 states and 185433 transitions. [2021-06-05 23:52:10,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:10,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:10,521 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:10,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-06-05 23:52:10,721 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:10,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:10,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1434585171, now seen corresponding path program 116 times [2021-06-05 23:52:10,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:10,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120276923] [2021-06-05 23:52:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:11,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:11,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120276923] [2021-06-05 23:52:11,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120276923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:11,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852084563] [2021-06-05 23:52:11,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:52:11,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:52:11,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:11,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:52:11,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:11,466 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:52:11,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:52:11,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:11,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:11,472 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 23:52:11,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 23:52:11,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:52:11,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:11,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:11,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:11,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:9 [2021-06-05 23:52:11,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:11,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:52:11,615 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:11,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:11,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:11,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:52:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:11,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852084563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:11,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:11,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:52:11,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081726141] [2021-06-05 23:52:11,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:52:11,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:11,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:52:11,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:52:11,667 INFO L87 Difference]: Start difference. First operand 44829 states and 185433 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:14,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:14,338 INFO L93 Difference]: Finished difference Result 77450 states and 314222 transitions. [2021-06-05 23:52:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:52:14,338 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:14,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:14,557 INFO L225 Difference]: With dead ends: 77450 [2021-06-05 23:52:14,557 INFO L226 Difference]: Without dead ends: 77136 [2021-06-05 23:52:14,557 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1533.7ms TimeCoverageRelationStatistics Valid=452, Invalid=2740, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:52:14,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77136 states. [2021-06-05 23:52:15,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77136 to 44773. [2021-06-05 23:52:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44773 states, 44772 states have (on average 4.138144375949254) internal successors, (185273), 44772 states have internal predecessors, (185273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44773 states to 44773 states and 185273 transitions. [2021-06-05 23:52:15,679 INFO L78 Accepts]: Start accepts. Automaton has 44773 states and 185273 transitions. Word has length 39 [2021-06-05 23:52:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:15,679 INFO L482 AbstractCegarLoop]: Abstraction has 44773 states and 185273 transitions. [2021-06-05 23:52:15,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand 44773 states and 185273 transitions. [2021-06-05 23:52:15,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:15,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:15,758 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:15,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable656 [2021-06-05 23:52:15,959 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:15,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:15,959 INFO L82 PathProgramCache]: Analyzing trace with hash 536940103, now seen corresponding path program 117 times [2021-06-05 23:52:15,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:15,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843343725] [2021-06-05 23:52:15,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:16,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:16,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843343725] [2021-06-05 23:52:16,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843343725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:16,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991067796] [2021-06-05 23:52:16,207 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 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 23:52:16,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:52:16,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:16,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:52:16,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:16,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:16,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:16,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 23:52:16,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:16,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:16,419 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 23:52:16,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:91 [2021-06-05 23:52:16,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:52:16,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:16,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:16,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:16,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-06-05 23:52:16,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:16,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:52:16,583 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:16,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:16,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:16,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:52:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:16,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991067796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:16,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:16,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:52:16,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383437267] [2021-06-05 23:52:16,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:52:16,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:16,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:52:16,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:52:16,628 INFO L87 Difference]: Start difference. First operand 44773 states and 185273 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:19,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:19,412 INFO L93 Difference]: Finished difference Result 78265 states and 318586 transitions. [2021-06-05 23:52:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:52:19,413 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:19,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:19,631 INFO L225 Difference]: With dead ends: 78265 [2021-06-05 23:52:19,631 INFO L226 Difference]: Without dead ends: 78192 [2021-06-05 23:52:19,631 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 1539.0ms TimeCoverageRelationStatistics Valid=472, Invalid=3310, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:52:19,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78192 states. [2021-06-05 23:52:20,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78192 to 45190. [2021-06-05 23:52:20,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45190 states, 45189 states have (on average 4.134922215583439) internal successors, (186853), 45189 states have internal predecessors, (186853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:20,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45190 states to 45190 states and 186853 transitions. [2021-06-05 23:52:20,845 INFO L78 Accepts]: Start accepts. Automaton has 45190 states and 186853 transitions. Word has length 39 [2021-06-05 23:52:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:20,845 INFO L482 AbstractCegarLoop]: Abstraction has 45190 states and 186853 transitions. [2021-06-05 23:52:20,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:20,845 INFO L276 IsEmpty]: Start isEmpty. Operand 45190 states and 186853 transitions. [2021-06-05 23:52:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:21,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:21,174 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:21,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:21,375 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:21,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:21,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1823507719, now seen corresponding path program 118 times [2021-06-05 23:52:21,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:21,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397562887] [2021-06-05 23:52:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:21,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:21,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397562887] [2021-06-05 23:52:21,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397562887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:21,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621729981] [2021-06-05 23:52:21,672 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 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 23:52:21,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:52:21,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:21,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:52:21,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:21,849 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:52:21,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:52:21,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:21,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:21,856 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 23:52:21,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:52:21,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:52:21,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:21,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:21,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:21,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:52:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:21,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621729981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:21,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:21,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:52:21,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538716375] [2021-06-05 23:52:21,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:52:21,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:21,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:52:21,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:52:21,985 INFO L87 Difference]: Start difference. First operand 45190 states and 186853 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:24,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:24,064 INFO L93 Difference]: Finished difference Result 76243 states and 310030 transitions. [2021-06-05 23:52:24,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:52:24,065 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:24,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:24,276 INFO L225 Difference]: With dead ends: 76243 [2021-06-05 23:52:24,277 INFO L226 Difference]: Without dead ends: 75935 [2021-06-05 23:52:24,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1231.1ms TimeCoverageRelationStatistics Valid=401, Invalid=1951, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:52:24,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75935 states. [2021-06-05 23:52:25,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75935 to 45196. [2021-06-05 23:52:25,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45196 states, 45195 states have (on average 4.135302577718774) internal successors, (186895), 45195 states have internal predecessors, (186895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45196 states to 45196 states and 186895 transitions. [2021-06-05 23:52:25,480 INFO L78 Accepts]: Start accepts. Automaton has 45196 states and 186895 transitions. Word has length 39 [2021-06-05 23:52:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:25,480 INFO L482 AbstractCegarLoop]: Abstraction has 45196 states and 186895 transitions. [2021-06-05 23:52:25,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:25,480 INFO L276 IsEmpty]: Start isEmpty. Operand 45196 states and 186895 transitions. [2021-06-05 23:52:25,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:25,557 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:25,557 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:25,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-06-05 23:52:25,758 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:25,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1220398863, now seen corresponding path program 119 times [2021-06-05 23:52:25,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:25,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809561518] [2021-06-05 23:52:25,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:26,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:26,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809561518] [2021-06-05 23:52:26,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809561518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:26,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327451535] [2021-06-05 23:52:26,059 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 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 23:52:26,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:52:26,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:26,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:52:26,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:26,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:26,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:26,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:26,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:26,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 23:52:26,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:52:26,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:26,276 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 23:52:26,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:45 [2021-06-05 23:52:26,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:52:26,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:26,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:26,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:26,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 23:52:26,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:26,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:26,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:26,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:26,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-06-05 23:52:26,470 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:26,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:26,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:26,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:3 [2021-06-05 23:52:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:26,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327451535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:26,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:26,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:52:26,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478438066] [2021-06-05 23:52:26,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:52:26,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:26,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:52:26,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:52:26,498 INFO L87 Difference]: Start difference. First operand 45196 states and 186895 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:29,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:29,454 INFO L93 Difference]: Finished difference Result 72562 states and 295371 transitions. [2021-06-05 23:52:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:52:29,454 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:29,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:29,654 INFO L225 Difference]: With dead ends: 72562 [2021-06-05 23:52:29,654 INFO L226 Difference]: Without dead ends: 72393 [2021-06-05 23:52:29,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1839.2ms TimeCoverageRelationStatistics Valid=450, Invalid=2856, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:52:29,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72393 states. [2021-06-05 23:52:30,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72393 to 45350. [2021-06-05 23:52:30,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45350 states, 45349 states have (on average 4.132042602923989) internal successors, (187384), 45349 states have internal predecessors, (187384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:30,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45350 states to 45350 states and 187384 transitions. [2021-06-05 23:52:30,808 INFO L78 Accepts]: Start accepts. Automaton has 45350 states and 187384 transitions. Word has length 39 [2021-06-05 23:52:30,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:30,808 INFO L482 AbstractCegarLoop]: Abstraction has 45350 states and 187384 transitions. [2021-06-05 23:52:30,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 45350 states and 187384 transitions. [2021-06-05 23:52:31,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:31,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:31,134 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:31,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable664,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:31,349 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:31,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:31,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1284438517, now seen corresponding path program 120 times [2021-06-05 23:52:31,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:31,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033475285] [2021-06-05 23:52:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:31,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:31,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033475285] [2021-06-05 23:52:31,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033475285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:31,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871998937] [2021-06-05 23:52:31,607 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 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 23:52:31,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:52:31,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:31,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:52:31,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:31,860 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:52:31,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 23:52:31,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:31,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:31,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:31,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:37 [2021-06-05 23:52:31,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:31,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:31,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-06-05 23:52:31,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:52:32,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:32,006 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 23:52:32,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:35 [2021-06-05 23:52:32,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:32,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:52:32,131 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:32,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:32,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:32,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:37 [2021-06-05 23:52:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:32,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871998937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:32,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:32,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-05 23:52:32,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205303476] [2021-06-05 23:52:32,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:52:32,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:32,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:52:32,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:52:32,240 INFO L87 Difference]: Start difference. First operand 45350 states and 187384 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:35,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:35,439 INFO L93 Difference]: Finished difference Result 91346 states and 368826 transitions. [2021-06-05 23:52:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:52:35,440 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:35,692 INFO L225 Difference]: With dead ends: 91346 [2021-06-05 23:52:35,692 INFO L226 Difference]: Without dead ends: 91202 [2021-06-05 23:52:35,693 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 2177.0ms TimeCoverageRelationStatistics Valid=589, Invalid=3571, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:52:35,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91202 states. [2021-06-05 23:52:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91202 to 45395. [2021-06-05 23:52:36,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45395 states, 45394 states have (on average 4.131515178217385) internal successors, (187546), 45394 states have internal predecessors, (187546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:36,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45395 states to 45395 states and 187546 transitions. [2021-06-05 23:52:36,962 INFO L78 Accepts]: Start accepts. Automaton has 45395 states and 187546 transitions. Word has length 39 [2021-06-05 23:52:36,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:36,962 INFO L482 AbstractCegarLoop]: Abstraction has 45395 states and 187546 transitions. [2021-06-05 23:52:36,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:36,962 INFO L276 IsEmpty]: Start isEmpty. Operand 45395 states and 187546 transitions. [2021-06-05 23:52:37,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:37,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:37,040 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:37,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable668 [2021-06-05 23:52:37,240 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:37,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:37,240 INFO L82 PathProgramCache]: Analyzing trace with hash -647042379, now seen corresponding path program 121 times [2021-06-05 23:52:37,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:37,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321532633] [2021-06-05 23:52:37,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:37,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:37,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321532633] [2021-06-05 23:52:37,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321532633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:37,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544454250] [2021-06-05 23:52:37,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:52:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:37,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:52:37,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:37,877 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:52:37,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:52:37,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:37,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:37,884 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 23:52:37,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:52:37,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:52:37,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:37,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:37,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:37,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 23:52:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:38,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544454250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:38,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:38,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:52:38,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739911340] [2021-06-05 23:52:38,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:52:38,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:38,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:52:38,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:52:38,005 INFO L87 Difference]: Start difference. First operand 45395 states and 187546 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:39,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:39,531 INFO L93 Difference]: Finished difference Result 80962 states and 330508 transitions. [2021-06-05 23:52:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:52:39,532 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:40,001 INFO L225 Difference]: With dead ends: 80962 [2021-06-05 23:52:40,001 INFO L226 Difference]: Without dead ends: 80881 [2021-06-05 23:52:40,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1088.8ms TimeCoverageRelationStatistics Valid=306, Invalid=1586, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:52:40,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80881 states. [2021-06-05 23:52:40,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80881 to 45101. [2021-06-05 23:52:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45101 states, 45100 states have (on average 4.133414634146342) internal successors, (186417), 45100 states have internal predecessors, (186417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:41,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45101 states to 45101 states and 186417 transitions. [2021-06-05 23:52:41,240 INFO L78 Accepts]: Start accepts. Automaton has 45101 states and 186417 transitions. Word has length 39 [2021-06-05 23:52:41,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:41,241 INFO L482 AbstractCegarLoop]: Abstraction has 45101 states and 186417 transitions. [2021-06-05 23:52:41,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:41,241 INFO L276 IsEmpty]: Start isEmpty. Operand 45101 states and 186417 transitions. [2021-06-05 23:52:41,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:41,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:41,320 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:41,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-06-05 23:52:41,520 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:41,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:41,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1411352253, now seen corresponding path program 122 times [2021-06-05 23:52:41,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:41,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216529846] [2021-06-05 23:52:41,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:41,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:41,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216529846] [2021-06-05 23:52:41,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216529846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:41,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290720217] [2021-06-05 23:52:41,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:52:41,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:52:41,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:41,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:52:41,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:42,008 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:52:42,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:52:42,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:42,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:42,015 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 23:52:42,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:52:42,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:52:42,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:42,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:42,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:42,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:9 [2021-06-05 23:52:42,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:42,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:52:42,135 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:42,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:42,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:42,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:52:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:42,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290720217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:42,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:42,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:52:42,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117921305] [2021-06-05 23:52:42,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:52:42,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:42,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:52:42,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:52:42,188 INFO L87 Difference]: Start difference. First operand 45101 states and 186417 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:43,984 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-06-05 23:52:45,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:45,015 INFO L93 Difference]: Finished difference Result 91900 states and 371553 transitions. [2021-06-05 23:52:45,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:52:45,015 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:45,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:45,271 INFO L225 Difference]: With dead ends: 91900 [2021-06-05 23:52:45,271 INFO L226 Difference]: Without dead ends: 91492 [2021-06-05 23:52:45,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1863.2ms TimeCoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:52:45,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91492 states. [2021-06-05 23:52:46,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91492 to 44801. [2021-06-05 23:52:46,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44801 states, 44800 states have (on average 4.138058035714286) internal successors, (185385), 44800 states have internal predecessors, (185385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:46,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44801 states to 44801 states and 185385 transitions. [2021-06-05 23:52:46,560 INFO L78 Accepts]: Start accepts. Automaton has 44801 states and 185385 transitions. Word has length 39 [2021-06-05 23:52:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:46,560 INFO L482 AbstractCegarLoop]: Abstraction has 44801 states and 185385 transitions. [2021-06-05 23:52:46,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 44801 states and 185385 transitions. [2021-06-05 23:52:46,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:46,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:46,637 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:46,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-05 23:52:46,841 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:46,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:46,841 INFO L82 PathProgramCache]: Analyzing trace with hash 7253553, now seen corresponding path program 123 times [2021-06-05 23:52:46,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:46,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980278256] [2021-06-05 23:52:46,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:47,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:47,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980278256] [2021-06-05 23:52:47,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980278256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:47,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856648859] [2021-06-05 23:52:47,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:52:47,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:52:47,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:47,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:52:47,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:47,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:47,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:47,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 23:52:47,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:47,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:47,584 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 23:52:47,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:89 [2021-06-05 23:52:47,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:52:47,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:47,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:47,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:47,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-06-05 23:52:47,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:47,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:52:47,716 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:47,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:47,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:47,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:52:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:47,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856648859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:47,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:47,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:52:47,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264733314] [2021-06-05 23:52:47,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:52:47,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:47,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:52:47,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:52:47,760 INFO L87 Difference]: Start difference. First operand 44801 states and 185385 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:50,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:50,594 INFO L93 Difference]: Finished difference Result 80064 states and 325573 transitions. [2021-06-05 23:52:50,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:52:50,594 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:50,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:50,813 INFO L225 Difference]: With dead ends: 80064 [2021-06-05 23:52:50,813 INFO L226 Difference]: Without dead ends: 79991 [2021-06-05 23:52:50,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1742.7ms TimeCoverageRelationStatistics Valid=514, Invalid=3646, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:52:50,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79991 states. [2021-06-05 23:52:51,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79991 to 45346. [2021-06-05 23:52:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45346 states, 45345 states have (on average 4.135715073326717) internal successors, (187534), 45345 states have internal predecessors, (187534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45346 states to 45346 states and 187534 transitions. [2021-06-05 23:52:51,967 INFO L78 Accepts]: Start accepts. Automaton has 45346 states and 187534 transitions. Word has length 39 [2021-06-05 23:52:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:51,967 INFO L482 AbstractCegarLoop]: Abstraction has 45346 states and 187534 transitions. [2021-06-05 23:52:51,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 45346 states and 187534 transitions. [2021-06-05 23:52:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:52,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:52,044 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:52,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:52,244 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:52,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:52,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1941773027, now seen corresponding path program 124 times [2021-06-05 23:52:52,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:52,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054283722] [2021-06-05 23:52:52,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:52,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:52,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054283722] [2021-06-05 23:52:52,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054283722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:52,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475183737] [2021-06-05 23:52:52,545 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 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 23:52:52,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:52:52,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:52,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:52:52,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:52,743 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:52:52,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:52:52,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:52,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:52,750 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 23:52:52,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:52:52,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:52:52,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:52,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:52,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:52,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:52:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:52,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475183737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:52,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:52,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:52:52,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746118176] [2021-06-05 23:52:52,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:52:52,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:52,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:52:52,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:52:52,852 INFO L87 Difference]: Start difference. First operand 45346 states and 187534 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:54,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:54,825 INFO L93 Difference]: Finished difference Result 77207 states and 314035 transitions. [2021-06-05 23:52:54,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:52:54,826 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:55,038 INFO L225 Difference]: With dead ends: 77207 [2021-06-05 23:52:55,038 INFO L226 Difference]: Without dead ends: 76899 [2021-06-05 23:52:55,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1215.0ms TimeCoverageRelationStatistics Valid=390, Invalid=1962, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:52:55,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76899 states. [2021-06-05 23:52:56,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76899 to 45258. [2021-06-05 23:52:56,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45258 states, 45257 states have (on average 4.137216342223303) internal successors, (187238), 45257 states have internal predecessors, (187238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45258 states to 45258 states and 187238 transitions. [2021-06-05 23:52:56,262 INFO L78 Accepts]: Start accepts. Automaton has 45258 states and 187238 transitions. Word has length 39 [2021-06-05 23:52:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:56,262 INFO L482 AbstractCegarLoop]: Abstraction has 45258 states and 187238 transitions. [2021-06-05 23:52:56,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:56,262 INFO L276 IsEmpty]: Start isEmpty. Operand 45258 states and 187238 transitions. [2021-06-05 23:52:56,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:56,341 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:56,341 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:56,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:56,541 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:56,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:56,542 INFO L82 PathProgramCache]: Analyzing trace with hash -2058885455, now seen corresponding path program 125 times [2021-06-05 23:52:56,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:56,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899475901] [2021-06-05 23:52:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:56,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:56,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899475901] [2021-06-05 23:52:56,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899475901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:56,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054599300] [2021-06-05 23:52:56,789 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 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 23:52:56,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:52:56,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:56,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 23:52:56,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:57,241 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:52:57,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:52:57,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:57,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:57,248 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 23:52:57,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:52:57,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:52:57,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:57,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:57,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:57,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 23:52:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:57,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054599300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:57,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:57,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:52:57,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083664245] [2021-06-05 23:52:57,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:52:57,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:57,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:52:57,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:52:57,340 INFO L87 Difference]: Start difference. First operand 45258 states and 187238 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:59,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:59,602 INFO L93 Difference]: Finished difference Result 105613 states and 428490 transitions. [2021-06-05 23:52:59,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:52:59,602 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:59,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:59,926 INFO L225 Difference]: With dead ends: 105613 [2021-06-05 23:52:59,926 INFO L226 Difference]: Without dead ends: 105532 [2021-06-05 23:52:59,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1383.4ms TimeCoverageRelationStatistics Valid=418, Invalid=2234, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:53:00,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105532 states. [2021-06-05 23:53:01,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105532 to 44901. [2021-06-05 23:53:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44901 states, 44900 states have (on average 4.137750556792873) internal successors, (185785), 44900 states have internal predecessors, (185785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:01,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44901 states to 44901 states and 185785 transitions. [2021-06-05 23:53:01,339 INFO L78 Accepts]: Start accepts. Automaton has 44901 states and 185785 transitions. Word has length 39 [2021-06-05 23:53:01,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:01,339 INFO L482 AbstractCegarLoop]: Abstraction has 44901 states and 185785 transitions. [2021-06-05 23:53:01,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:01,339 INFO L276 IsEmpty]: Start isEmpty. Operand 44901 states and 185785 transitions. [2021-06-05 23:53:01,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:01,414 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:01,414 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:01,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-06-05 23:53:01,614 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:01,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:01,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1149977299, now seen corresponding path program 126 times [2021-06-05 23:53:01,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:01,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380443034] [2021-06-05 23:53:01,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:01,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:01,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380443034] [2021-06-05 23:53:01,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380443034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:01,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186493702] [2021-06-05 23:53:01,865 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 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 23:53:01,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:53:01,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:01,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:53:01,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:02,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:02,152 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 55 [2021-06-05 23:53:02,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:02,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:02,177 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 23:53:02,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:141 [2021-06-05 23:53:02,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:02,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:02,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:02,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2021-06-05 23:53:02,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:53:02,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:02,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:02,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:02,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 39 [2021-06-05 23:53:02,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:02,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:02,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 23:53:02,335 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:02,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:02,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:02,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:02,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-06-05 23:53:02,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 23:53:02,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:02,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 23:53:02,354 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:02,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:02,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:02,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:02,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 23:53:02,360 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:02,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:02,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:02,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:02,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2021-06-05 23:53:02,374 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 23:53:02,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 23:53:02,378 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:02,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:02,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 23:53:02,383 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:02,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:02,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:02,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:02,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 23:53:02,390 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:02,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:02,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:02,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:02,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 23:53:02,396 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:02,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:02,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:02,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 29 [2021-06-05 23:53:02,401 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:02,554 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-05 23:53:02,554 INFO L628 ElimStorePlain]: treesize reduction 184, result has 57.2 percent of original size [2021-06-05 23:53:02,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 23:53:02,559 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:723, output treesize:241 [2021-06-05 23:53:02,968 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-06-05 23:53:03,205 INFO L446 ElimStorePlain]: Different costs {1=[q2, v_prenex_273, v_prenex_274, v_prenex_275], 3=[v_prenex_276]} [2021-06-05 23:53:03,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:03,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:53:03,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:03,305 INFO L628 ElimStorePlain]: treesize reduction 49, result has 73.5 percent of original size [2021-06-05 23:53:03,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:03,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:53:03,314 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:53:03,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:03,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:03,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:53:03,367 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:53:03,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:03,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:03,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:53:03,422 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:53:03,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:03,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:03,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:03,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2021-06-05 23:53:03,483 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 23:53:03,569 INFO L628 ElimStorePlain]: treesize reduction 12, result has 90.6 percent of original size [2021-06-05 23:53:03,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 23:53:03,571 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:196, output treesize:106 [2021-06-05 23:53:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:03,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186493702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:03,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:03,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:53:03,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855423958] [2021-06-05 23:53:03,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:53:03,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:03,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:53:03,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:53:03,659 INFO L87 Difference]: Start difference. First operand 44901 states and 185785 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:04,208 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2021-06-05 23:53:04,408 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-06-05 23:53:04,635 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-05 23:53:04,966 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-06-05 23:53:05,205 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-05 23:53:05,466 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-05 23:53:06,131 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-06-05 23:53:06,415 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-06-05 23:53:06,661 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2021-06-05 23:53:06,919 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-06-05 23:53:07,432 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-05 23:53:07,582 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2021-06-05 23:53:08,648 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-06-05 23:53:09,250 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-05 23:53:09,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:09,755 INFO L93 Difference]: Finished difference Result 77772 states and 316424 transitions. [2021-06-05 23:53:09,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 23:53:09,756 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:09,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:09,965 INFO L225 Difference]: With dead ends: 77772 [2021-06-05 23:53:09,965 INFO L226 Difference]: Without dead ends: 77672 [2021-06-05 23:53:09,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1872 ImplicationChecksByTransitivity, 5316.8ms TimeCoverageRelationStatistics Valid=786, Invalid=5534, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 23:53:10,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77672 states. [2021-06-05 23:53:10,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77672 to 45280. [2021-06-05 23:53:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45280 states, 45279 states have (on average 4.136288345590671) internal successors, (187287), 45279 states have internal predecessors, (187287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45280 states to 45280 states and 187287 transitions. [2021-06-05 23:53:11,089 INFO L78 Accepts]: Start accepts. Automaton has 45280 states and 187287 transitions. Word has length 39 [2021-06-05 23:53:11,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:11,089 INFO L482 AbstractCegarLoop]: Abstraction has 45280 states and 187287 transitions. [2021-06-05 23:53:11,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:11,089 INFO L276 IsEmpty]: Start isEmpty. Operand 45280 states and 187287 transitions. [2021-06-05 23:53:11,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:11,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:11,165 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:11,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable684 [2021-06-05 23:53:11,366 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:11,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:11,366 INFO L82 PathProgramCache]: Analyzing trace with hash 648981079, now seen corresponding path program 127 times [2021-06-05 23:53:11,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:11,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134458755] [2021-06-05 23:53:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:11,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:11,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134458755] [2021-06-05 23:53:11,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134458755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:11,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872800629] [2021-06-05 23:53:11,609 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 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 23:53:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:11,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:53:11,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:11,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:53:11,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:11,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:11,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:11,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:53:11,836 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:53:11,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 23:53:11,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:11,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:11,839 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 23:53:11,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 23:53:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:11,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872800629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:11,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:11,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:53:11,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898724628] [2021-06-05 23:53:11,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:53:11,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:11,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:53:11,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:53:11,899 INFO L87 Difference]: Start difference. First operand 45280 states and 187287 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:13,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:13,757 INFO L93 Difference]: Finished difference Result 86531 states and 353997 transitions. [2021-06-05 23:53:13,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:53:13,757 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:13,998 INFO L225 Difference]: With dead ends: 86531 [2021-06-05 23:53:13,998 INFO L226 Difference]: Without dead ends: 86450 [2021-06-05 23:53:13,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1079.5ms TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:53:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86450 states. [2021-06-05 23:53:15,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86450 to 45253. [2021-06-05 23:53:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45253 states, 45252 states have (on average 4.139065676655176) internal successors, (187301), 45252 states have internal predecessors, (187301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45253 states to 45253 states and 187301 transitions. [2021-06-05 23:53:15,290 INFO L78 Accepts]: Start accepts. Automaton has 45253 states and 187301 transitions. Word has length 39 [2021-06-05 23:53:15,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:15,290 INFO L482 AbstractCegarLoop]: Abstraction has 45253 states and 187301 transitions. [2021-06-05 23:53:15,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:15,290 INFO L276 IsEmpty]: Start isEmpty. Operand 45253 states and 187301 transitions. [2021-06-05 23:53:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:15,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:15,367 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:15,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable700,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:15,567 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:15,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:15,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1787565329, now seen corresponding path program 128 times [2021-06-05 23:53:15,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:15,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998463970] [2021-06-05 23:53:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:15,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:15,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998463970] [2021-06-05 23:53:15,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998463970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:15,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572520593] [2021-06-05 23:53:15,804 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 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 23:53:16,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:53:16,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:16,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:53:16,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:16,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:53:16,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:16,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:16,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:16,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-05 23:53:16,354 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:53:16,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 23:53:16,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:16,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:16,356 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 23:53:16,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-06-05 23:53:16,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:16,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:53:16,387 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:53:16,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:16,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:53:16,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:53:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:16,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572520593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:16,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:16,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:53:16,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62417699] [2021-06-05 23:53:16,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:53:16,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:16,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:53:16,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:53:16,431 INFO L87 Difference]: Start difference. First operand 45253 states and 187301 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:19,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:19,039 INFO L93 Difference]: Finished difference Result 106336 states and 436045 transitions. [2021-06-05 23:53:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:53:19,039 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:19,355 INFO L225 Difference]: With dead ends: 106336 [2021-06-05 23:53:19,355 INFO L226 Difference]: Without dead ends: 106255 [2021-06-05 23:53:19,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1278.4ms TimeCoverageRelationStatistics Valid=404, Invalid=2788, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:53:19,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106255 states. [2021-06-05 23:53:20,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106255 to 45453. [2021-06-05 23:53:20,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45453 states, 45452 states have (on average 4.139861832262607) internal successors, (188165), 45452 states have internal predecessors, (188165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:20,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45453 states to 45453 states and 188165 transitions. [2021-06-05 23:53:20,744 INFO L78 Accepts]: Start accepts. Automaton has 45453 states and 188165 transitions. Word has length 39 [2021-06-05 23:53:20,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:20,744 INFO L482 AbstractCegarLoop]: Abstraction has 45453 states and 188165 transitions. [2021-06-05 23:53:20,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:20,745 INFO L276 IsEmpty]: Start isEmpty. Operand 45453 states and 188165 transitions. [2021-06-05 23:53:20,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:20,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:20,822 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:21,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-06-05 23:53:21,022 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:21,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:21,022 INFO L82 PathProgramCache]: Analyzing trace with hash -368572305, now seen corresponding path program 129 times [2021-06-05 23:53:21,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:21,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273123769] [2021-06-05 23:53:21,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:21,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:21,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273123769] [2021-06-05 23:53:21,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273123769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:21,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757740930] [2021-06-05 23:53:21,264 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 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 23:53:21,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:53:21,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:21,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:53:21,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:21,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:53:21,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:21,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:21,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:21,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-06-05 23:53:21,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:21,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:21,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 23:53:21,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:21,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:21,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:53:21,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:75 [2021-06-05 23:53:21,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:21,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:53:21,628 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:53:21,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:21,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:21,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-06-05 23:53:21,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:21,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:21,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:53:21,670 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-06-05 23:53:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:21,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757740930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:21,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:21,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:53:21,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716833858] [2021-06-05 23:53:21,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:53:21,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:21,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:53:21,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:53:21,759 INFO L87 Difference]: Start difference. First operand 45453 states and 188165 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:25,344 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-06-05 23:53:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:26,532 INFO L93 Difference]: Finished difference Result 111175 states and 454293 transitions. [2021-06-05 23:53:26,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 23:53:26,533 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:26,866 INFO L225 Difference]: With dead ends: 111175 [2021-06-05 23:53:26,866 INFO L226 Difference]: Without dead ends: 111066 [2021-06-05 23:53:26,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 3075.6ms TimeCoverageRelationStatistics Valid=723, Invalid=5757, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 23:53:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111066 states. [2021-06-05 23:53:28,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111066 to 46196. [2021-06-05 23:53:28,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46196 states, 46195 states have (on average 4.138694663924667) internal successors, (191187), 46195 states have internal predecessors, (191187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46196 states to 46196 states and 191187 transitions. [2021-06-05 23:53:28,359 INFO L78 Accepts]: Start accepts. Automaton has 46196 states and 191187 transitions. Word has length 39 [2021-06-05 23:53:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:28,359 INFO L482 AbstractCegarLoop]: Abstraction has 46196 states and 191187 transitions. [2021-06-05 23:53:28,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:28,359 INFO L276 IsEmpty]: Start isEmpty. Operand 46196 states and 191187 transitions. [2021-06-05 23:53:28,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:28,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:28,781 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:28,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable703 [2021-06-05 23:53:28,998 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:28,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:28,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2117435505, now seen corresponding path program 130 times [2021-06-05 23:53:28,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:28,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450976785] [2021-06-05 23:53:28,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:29,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:29,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450976785] [2021-06-05 23:53:29,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450976785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:29,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331393238] [2021-06-05 23:53:29,256 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 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 23:53:29,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:53:29,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:29,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:53:29,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:29,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:53:29,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:29,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:29,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:29,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:53:29,555 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:53:29,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:53:29,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:29,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:29,557 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 23:53:29,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:53:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:29,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331393238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:29,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:29,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:53:29,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646587310] [2021-06-05 23:53:29,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:53:29,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:29,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:53:29,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:53:29,598 INFO L87 Difference]: Start difference. First operand 46196 states and 191187 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:32,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:32,050 INFO L93 Difference]: Finished difference Result 119473 states and 484851 transitions. [2021-06-05 23:53:32,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:53:32,051 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:32,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:32,424 INFO L225 Difference]: With dead ends: 119473 [2021-06-05 23:53:32,424 INFO L226 Difference]: Without dead ends: 119340 [2021-06-05 23:53:32,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1317.1ms TimeCoverageRelationStatistics Valid=427, Invalid=2329, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:53:32,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119340 states. [2021-06-05 23:53:33,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119340 to 45467. [2021-06-05 23:53:33,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45467 states, 45466 states have (on average 4.142238155984692) internal successors, (188331), 45466 states have internal predecessors, (188331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45467 states to 45467 states and 188331 transitions. [2021-06-05 23:53:34,026 INFO L78 Accepts]: Start accepts. Automaton has 45467 states and 188331 transitions. Word has length 39 [2021-06-05 23:53:34,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:34,026 INFO L482 AbstractCegarLoop]: Abstraction has 45467 states and 188331 transitions. [2021-06-05 23:53:34,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:34,026 INFO L276 IsEmpty]: Start isEmpty. Operand 45467 states and 188331 transitions. [2021-06-05 23:53:34,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:34,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:34,104 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:34,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-06-05 23:53:34,313 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:34,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:34,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1108442007, now seen corresponding path program 131 times [2021-06-05 23:53:34,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:34,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122323944] [2021-06-05 23:53:34,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:34,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:34,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122323944] [2021-06-05 23:53:34,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122323944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:34,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549796759] [2021-06-05 23:53:34,936 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 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 23:53:34,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:53:34,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:34,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:53:34,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:35,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:35,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:35,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:35,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:35,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 51 [2021-06-05 23:53:35,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:53:35,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:35,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:35,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:70, output treesize:47 [2021-06-05 23:53:35,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:53:35,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:35,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:35,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:35,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 23:53:35,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:35,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:35,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:35,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:35,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-06-05 23:53:35,401 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:35,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:35,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:35,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:3 [2021-06-05 23:53:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:35,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549796759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:35,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:35,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:53:35,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355649318] [2021-06-05 23:53:35,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:53:35,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:35,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:53:35,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:53:35,429 INFO L87 Difference]: Start difference. First operand 45467 states and 188331 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:37,968 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 23:53:39,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:39,097 INFO L93 Difference]: Finished difference Result 75651 states and 307501 transitions. [2021-06-05 23:53:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:53:39,098 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:39,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:39,304 INFO L225 Difference]: With dead ends: 75651 [2021-06-05 23:53:39,304 INFO L226 Difference]: Without dead ends: 75362 [2021-06-05 23:53:39,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 2649.8ms TimeCoverageRelationStatistics Valid=465, Invalid=3317, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:53:39,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75362 states. [2021-06-05 23:53:40,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75362 to 45965. [2021-06-05 23:53:40,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45965 states, 45964 states have (on average 4.136672178226438) internal successors, (190138), 45964 states have internal predecessors, (190138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:40,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45965 states to 45965 states and 190138 transitions. [2021-06-05 23:53:40,437 INFO L78 Accepts]: Start accepts. Automaton has 45965 states and 190138 transitions. Word has length 39 [2021-06-05 23:53:40,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:40,437 INFO L482 AbstractCegarLoop]: Abstraction has 45965 states and 190138 transitions. [2021-06-05 23:53:40,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:40,437 INFO L276 IsEmpty]: Start isEmpty. Operand 45965 states and 190138 transitions. [2021-06-05 23:53:40,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:40,516 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:40,516 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:40,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:40,717 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:40,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:40,717 INFO L82 PathProgramCache]: Analyzing trace with hash 47383017, now seen corresponding path program 132 times [2021-06-05 23:53:40,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:40,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331719216] [2021-06-05 23:53:40,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:41,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:41,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331719216] [2021-06-05 23:53:41,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331719216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:41,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773368549] [2021-06-05 23:53:41,034 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 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 23:53:41,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:53:41,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:41,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:53:41,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:41,368 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:53:41,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 23:53:41,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:41,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:41,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:41,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:33 [2021-06-05 23:53:41,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:41,438 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2021-06-05 23:53:41,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:41,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:41,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:41,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:106 [2021-06-05 23:53:42,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:42,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:53:42,003 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:53:42,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:42,033 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 23:53:42,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 13 [2021-06-05 23:53:42,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:42,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:42,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:53:42,059 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:70, output treesize:55 [2021-06-05 23:53:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:42,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773368549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:42,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:42,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:53:42,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257787208] [2021-06-05 23:53:42,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:53:42,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:42,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:53:42,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:53:42,155 INFO L87 Difference]: Start difference. First operand 45965 states and 190138 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:46,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:46,773 INFO L93 Difference]: Finished difference Result 90369 states and 363953 transitions. [2021-06-05 23:53:46,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 23:53:46,774 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:46,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:47,020 INFO L225 Difference]: With dead ends: 90369 [2021-06-05 23:53:47,020 INFO L226 Difference]: Without dead ends: 89924 [2021-06-05 23:53:47,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 3840.9ms TimeCoverageRelationStatistics Valid=1106, Invalid=5536, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 23:53:47,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89924 states. [2021-06-05 23:53:48,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89924 to 45929. [2021-06-05 23:53:48,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45929 states, 45928 states have (on average 4.137084131684375) internal successors, (190008), 45928 states have internal predecessors, (190008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:48,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45929 states to 45929 states and 190008 transitions. [2021-06-05 23:53:48,565 INFO L78 Accepts]: Start accepts. Automaton has 45929 states and 190008 transitions. Word has length 39 [2021-06-05 23:53:48,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:48,565 INFO L482 AbstractCegarLoop]: Abstraction has 45929 states and 190008 transitions. [2021-06-05 23:53:48,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:48,565 INFO L276 IsEmpty]: Start isEmpty. Operand 45929 states and 190008 transitions. [2021-06-05 23:53:48,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:48,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:48,653 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:48,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable716 [2021-06-05 23:53:48,854 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:48,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:48,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1169439237, now seen corresponding path program 133 times [2021-06-05 23:53:48,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:48,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98171708] [2021-06-05 23:53:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:49,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:49,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98171708] [2021-06-05 23:53:49,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98171708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:49,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110401400] [2021-06-05 23:53:49,165 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 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 23:53:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:49,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:53:49,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:49,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:53:49,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:49,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:49,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:49,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:53:49,437 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:53:49,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:53:49,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:49,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:49,439 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 23:53:49,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:53:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:49,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110401400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:49,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:49,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:53:49,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17446728] [2021-06-05 23:53:49,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:53:49,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:49,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:53:49,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:53:49,482 INFO L87 Difference]: Start difference. First operand 45929 states and 190008 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:51,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:51,555 INFO L93 Difference]: Finished difference Result 94789 states and 384231 transitions. [2021-06-05 23:53:51,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:53:51,555 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:51,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:51,817 INFO L225 Difference]: With dead ends: 94789 [2021-06-05 23:53:51,818 INFO L226 Difference]: Without dead ends: 94492 [2021-06-05 23:53:51,818 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1201.5ms TimeCoverageRelationStatistics Valid=373, Invalid=2077, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:53:51,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94492 states. [2021-06-05 23:53:52,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94492 to 45983. [2021-06-05 23:53:53,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45983 states, 45982 states have (on average 4.137205863163847) internal successors, (190237), 45982 states have internal predecessors, (190237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45983 states to 45983 states and 190237 transitions. [2021-06-05 23:53:53,164 INFO L78 Accepts]: Start accepts. Automaton has 45983 states and 190237 transitions. Word has length 39 [2021-06-05 23:53:53,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:53,164 INFO L482 AbstractCegarLoop]: Abstraction has 45983 states and 190237 transitions. [2021-06-05 23:53:53,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:53,164 INFO L276 IsEmpty]: Start isEmpty. Operand 45983 states and 190237 transitions. [2021-06-05 23:53:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:53,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:53,240 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:53,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-05 23:53:53,441 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:53,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:53,441 INFO L82 PathProgramCache]: Analyzing trace with hash -965518491, now seen corresponding path program 134 times [2021-06-05 23:53:53,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:53,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101417442] [2021-06-05 23:53:53,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:53,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:53,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101417442] [2021-06-05 23:53:53,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101417442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:53,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286095949] [2021-06-05 23:53:53,727 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 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 23:53:53,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:53:53,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:53,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:53:53,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:53,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:53:53,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:53,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:53,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:53,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:38 [2021-06-05 23:53:54,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:54,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:54,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 23:53:54,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:54,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:54,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:53:54,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:73 [2021-06-05 23:53:54,090 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:53:54,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 23:53:54,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:54,099 INFO L628 ElimStorePlain]: treesize reduction 5, result has 72.2 percent of original size [2021-06-05 23:53:54,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:53:54,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 23:53:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:54,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286095949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:54,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:54,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:53:54,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363001035] [2021-06-05 23:53:54,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:53:54,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:54,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:53:54,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:53:54,146 INFO L87 Difference]: Start difference. First operand 45983 states and 190237 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:56,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:56,984 INFO L93 Difference]: Finished difference Result 83379 states and 338399 transitions. [2021-06-05 23:53:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:53:56,985 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:57,266 INFO L225 Difference]: With dead ends: 83379 [2021-06-05 23:53:57,267 INFO L226 Difference]: Without dead ends: 83185 [2021-06-05 23:53:57,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1641.0ms TimeCoverageRelationStatistics Valid=387, Invalid=2265, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:53:57,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83185 states. [2021-06-05 23:53:58,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83185 to 46077. [2021-06-05 23:53:58,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46077 states, 46076 states have (on average 4.136600399340221) internal successors, (190598), 46076 states have internal predecessors, (190598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46077 states to 46077 states and 190598 transitions. [2021-06-05 23:53:58,611 INFO L78 Accepts]: Start accepts. Automaton has 46077 states and 190598 transitions. Word has length 39 [2021-06-05 23:53:58,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:58,611 INFO L482 AbstractCegarLoop]: Abstraction has 46077 states and 190598 transitions. [2021-06-05 23:53:58,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:58,612 INFO L276 IsEmpty]: Start isEmpty. Operand 46077 states and 190598 transitions. [2021-06-05 23:53:58,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:58,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:58,692 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:58,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-06-05 23:53:58,893 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:58,893 INFO L82 PathProgramCache]: Analyzing trace with hash -694249073, now seen corresponding path program 135 times [2021-06-05 23:53:58,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:58,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651330718] [2021-06-05 23:53:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:59,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:59,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651330718] [2021-06-05 23:53:59,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651330718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:59,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728015484] [2021-06-05 23:53:59,176 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 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 23:53:59,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:53:59,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:59,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:53:59,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:59,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:53:59,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:59,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:59,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:59,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:36 [2021-06-05 23:53:59,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:59,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:59,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-06-05 23:53:59,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:59,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:59,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 23:53:59,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:71 [2021-06-05 23:53:59,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:59,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:53:59,626 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:53:59,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:59,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:53:59,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:53:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:59,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728015484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:59,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:59,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:53:59,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960319003] [2021-06-05 23:53:59,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:53:59,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:59,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:53:59,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:53:59,679 INFO L87 Difference]: Start difference. First operand 46077 states and 190598 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:00,987 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-06-05 23:54:03,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:54:03,901 INFO L93 Difference]: Finished difference Result 74119 states and 302105 transitions. [2021-06-05 23:54:03,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 23:54:03,901 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:54:03,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:54:04,095 INFO L225 Difference]: With dead ends: 74119 [2021-06-05 23:54:04,096 INFO L226 Difference]: Without dead ends: 73700 [2021-06-05 23:54:04,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 2805.6ms TimeCoverageRelationStatistics Valid=611, Invalid=5551, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:54:04,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73700 states. [2021-06-05 23:54:05,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73700 to 45849. [2021-06-05 23:54:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45849 states, 45848 states have (on average 4.138784679811551) internal successors, (189755), 45848 states have internal predecessors, (189755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:05,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45849 states to 45849 states and 189755 transitions. [2021-06-05 23:54:05,255 INFO L78 Accepts]: Start accepts. Automaton has 45849 states and 189755 transitions. Word has length 39 [2021-06-05 23:54:05,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:54:05,255 INFO L482 AbstractCegarLoop]: Abstraction has 45849 states and 189755 transitions. [2021-06-05 23:54:05,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:05,255 INFO L276 IsEmpty]: Start isEmpty. Operand 45849 states and 189755 transitions. [2021-06-05 23:54:05,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:54:05,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:54:05,332 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:54:05,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-06-05 23:54:05,533 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:54:05,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:54:05,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1627790633, now seen corresponding path program 136 times [2021-06-05 23:54:05,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:54:05,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306161547] [2021-06-05 23:54:05,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:54:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:54:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:05,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:54:05,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306161547] [2021-06-05 23:54:05,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306161547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:05,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898305783] [2021-06-05 23:54:05,832 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 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 23:54:05,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:54:05,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:54:05,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:54:05,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:54:06,045 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:54:06,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 23:54:06,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:06,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:06,052 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 23:54:06,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 23:54:06,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:54:06,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:06,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:06,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:54:06,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:54:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:06,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898305783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:06,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:54:06,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:54:06,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390064947] [2021-06-05 23:54:06,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:54:06,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:54:06,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:54:06,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:54:06,153 INFO L87 Difference]: Start difference. First operand 45849 states and 189755 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:07,587 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-06-05 23:54:07,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:54:07,988 INFO L93 Difference]: Finished difference Result 75742 states and 308462 transitions. [2021-06-05 23:54:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:54:07,988 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:54:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:54:08,196 INFO L225 Difference]: With dead ends: 75742 [2021-06-05 23:54:08,196 INFO L226 Difference]: Without dead ends: 75467 [2021-06-05 23:54:08,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1287.0ms TimeCoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:54:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75467 states. [2021-06-05 23:54:09,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75467 to 45869. [2021-06-05 23:54:09,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45869 states, 45868 states have (on average 4.138506148077091) internal successors, (189825), 45868 states have internal predecessors, (189825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:09,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45869 states to 45869 states and 189825 transitions. [2021-06-05 23:54:09,391 INFO L78 Accepts]: Start accepts. Automaton has 45869 states and 189825 transitions. Word has length 39 [2021-06-05 23:54:09,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:54:09,391 INFO L482 AbstractCegarLoop]: Abstraction has 45869 states and 189825 transitions. [2021-06-05 23:54:09,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:09,391 INFO L276 IsEmpty]: Start isEmpty. Operand 45869 states and 189825 transitions. [2021-06-05 23:54:09,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:54:09,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:54:09,470 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:54:09,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-05 23:54:09,670 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:54:09,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:54:09,670 INFO L82 PathProgramCache]: Analyzing trace with hash 521991405, now seen corresponding path program 137 times [2021-06-05 23:54:09,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:54:09,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163411066] [2021-06-05 23:54:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:54:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:54:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:09,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:54:09,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163411066] [2021-06-05 23:54:09,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163411066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:09,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878830492] [2021-06-05 23:54:09,981 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 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 23:54:10,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:54:10,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:54:10,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:54:10,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:54:10,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:10,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:10,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:10,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:10,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-06-05 23:54:10,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:54:10,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:10,258 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 23:54:10,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:48 [2021-06-05 23:54:10,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:54:10,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:10,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:10,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:54:10,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:54:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:10,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878830492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:10,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:54:10,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:54:10,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155157864] [2021-06-05 23:54:10,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:54:10,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:54:10,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:54:10,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:54:10,370 INFO L87 Difference]: Start difference. First operand 45869 states and 189825 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:54:13,642 INFO L93 Difference]: Finished difference Result 74959 states and 304862 transitions. [2021-06-05 23:54:13,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:54:13,643 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:54:13,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:54:13,850 INFO L225 Difference]: With dead ends: 74959 [2021-06-05 23:54:13,850 INFO L226 Difference]: Without dead ends: 74670 [2021-06-05 23:54:13,850 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1866.9ms TimeCoverageRelationStatistics Valid=469, Invalid=3191, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:54:13,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74670 states. [2021-06-05 23:54:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74670 to 46155. [2021-06-05 23:54:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46155 states, 46154 states have (on average 4.134636217879274) internal successors, (190830), 46154 states have internal predecessors, (190830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:15,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46155 states to 46155 states and 190830 transitions. [2021-06-05 23:54:15,024 INFO L78 Accepts]: Start accepts. Automaton has 46155 states and 190830 transitions. Word has length 39 [2021-06-05 23:54:15,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:54:15,024 INFO L482 AbstractCegarLoop]: Abstraction has 46155 states and 190830 transitions. [2021-06-05 23:54:15,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:15,024 INFO L276 IsEmpty]: Start isEmpty. Operand 46155 states and 190830 transitions. [2021-06-05 23:54:15,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:54:15,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:54:15,103 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:54:15,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable762 [2021-06-05 23:54:15,304 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:54:15,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:54:15,304 INFO L82 PathProgramCache]: Analyzing trace with hash 432208255, now seen corresponding path program 138 times [2021-06-05 23:54:15,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:54:15,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595265402] [2021-06-05 23:54:15,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:54:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:54:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:15,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:54:15,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595265402] [2021-06-05 23:54:15,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595265402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:15,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46371265] [2021-06-05 23:54:15,618 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 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 23:54:15,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:54:15,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:54:15,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:54:15,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:54:16,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:16,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:16,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2021-06-05 23:54:16,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:16,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:16,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:54:16,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:65, output treesize:43 [2021-06-05 23:54:16,199 INFO L446 ElimStorePlain]: Different costs {0=[f], 2=[v_prenex_282]} [2021-06-05 23:54:16,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 23:54:16,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:16,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:16,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:16,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:54:16,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 23:54:16,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:16,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:16,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:54:16,224 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:69, output treesize:19 [2021-06-05 23:54:16,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:16,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:54:16,282 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:54:16,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:16,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:54:16,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:54:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:16,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46371265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:16,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:54:16,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:54:16,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277832199] [2021-06-05 23:54:16,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:54:16,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:54:16,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:54:16,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:54:16,335 INFO L87 Difference]: Start difference. First operand 46155 states and 190830 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:16,968 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-06-05 23:54:22,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:54:22,131 INFO L93 Difference]: Finished difference Result 96033 states and 387034 transitions. [2021-06-05 23:54:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 23:54:22,131 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:54:22,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:54:22,399 INFO L225 Difference]: With dead ends: 96033 [2021-06-05 23:54:22,399 INFO L226 Difference]: Without dead ends: 95543 [2021-06-05 23:54:22,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3425 ImplicationChecksByTransitivity, 4557.4ms TimeCoverageRelationStatistics Valid=1383, Invalid=9123, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 23:54:22,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95543 states. [2021-06-05 23:54:23,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95543 to 46197. [2021-06-05 23:54:23,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46197 states, 46196 states have (on average 4.133518053511127) internal successors, (190952), 46196 states have internal predecessors, (190952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46197 states to 46197 states and 190952 transitions. [2021-06-05 23:54:23,679 INFO L78 Accepts]: Start accepts. Automaton has 46197 states and 190952 transitions. Word has length 39 [2021-06-05 23:54:23,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:54:23,679 INFO L482 AbstractCegarLoop]: Abstraction has 46197 states and 190952 transitions. [2021-06-05 23:54:23,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:23,679 INFO L276 IsEmpty]: Start isEmpty. Operand 46197 states and 190952 transitions. [2021-06-05 23:54:24,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:54:24,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:54:24,044 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:54:24,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable766 [2021-06-05 23:54:24,260 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:54:24,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:54:24,261 INFO L82 PathProgramCache]: Analyzing trace with hash 198290691, now seen corresponding path program 139 times [2021-06-05 23:54:24,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:54:24,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159135563] [2021-06-05 23:54:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:54:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:54:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:24,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:54:24,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159135563] [2021-06-05 23:54:24,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159135563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:24,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341265644] [2021-06-05 23:54:24,561 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 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 23:54:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:54:24,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:54:24,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:54:24,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:54:24,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:24,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:24,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:54:24,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:54:24,854 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:54:24,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:54:24,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:24,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:24,856 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 23:54:24,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:54:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:24,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341265644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:24,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:54:24,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:54:24,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532445952] [2021-06-05 23:54:24,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:54:24,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:54:24,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:54:24,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:54:24,898 INFO L87 Difference]: Start difference. First operand 46197 states and 190952 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:26,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:54:26,932 INFO L93 Difference]: Finished difference Result 94699 states and 383708 transitions. [2021-06-05 23:54:26,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:54:26,932 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:54:26,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:54:27,199 INFO L225 Difference]: With dead ends: 94699 [2021-06-05 23:54:27,199 INFO L226 Difference]: Without dead ends: 94446 [2021-06-05 23:54:27,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1113.5ms TimeCoverageRelationStatistics Valid=356, Invalid=1900, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:54:27,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94446 states. [2021-06-05 23:54:28,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94446 to 46251. [2021-06-05 23:54:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46251 states, 46250 states have (on average 4.1336432432432435) internal successors, (191181), 46250 states have internal predecessors, (191181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46251 states to 46251 states and 191181 transitions. [2021-06-05 23:54:28,541 INFO L78 Accepts]: Start accepts. Automaton has 46251 states and 191181 transitions. Word has length 39 [2021-06-05 23:54:28,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:54:28,541 INFO L482 AbstractCegarLoop]: Abstraction has 46251 states and 191181 transitions. [2021-06-05 23:54:28,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:28,541 INFO L276 IsEmpty]: Start isEmpty. Operand 46251 states and 191181 transitions. [2021-06-05 23:54:28,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:54:28,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:54:28,619 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:54:28,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable785 [2021-06-05 23:54:28,819 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:54:28,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:54:28,819 INFO L82 PathProgramCache]: Analyzing trace with hash 402211437, now seen corresponding path program 140 times [2021-06-05 23:54:28,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:54:28,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506201665] [2021-06-05 23:54:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:54:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:54:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:29,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:54:29,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506201665] [2021-06-05 23:54:29,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506201665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:29,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597087619] [2021-06-05 23:54:29,112 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 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 23:54:29,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:54:29,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:54:29,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:54:29,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:54:29,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:54:29,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:29,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:29,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:54:29,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:38 [2021-06-05 23:54:29,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:29,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:29,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 23:54:29,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:29,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:29,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:54:29,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:73 [2021-06-05 23:54:29,443 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:54:29,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 23:54:29,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:29,452 INFO L628 ElimStorePlain]: treesize reduction 5, result has 72.2 percent of original size [2021-06-05 23:54:29,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:54:29,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 23:54:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:29,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597087619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:29,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:54:29,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:54:29,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997132877] [2021-06-05 23:54:29,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:54:29,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:54:29,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:54:29,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:54:29,498 INFO L87 Difference]: Start difference. First operand 46251 states and 191181 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:31,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:54:31,893 INFO L93 Difference]: Finished difference Result 81180 states and 329463 transitions. [2021-06-05 23:54:31,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:54:31,893 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:54:31,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:54:32,348 INFO L225 Difference]: With dead ends: 81180 [2021-06-05 23:54:32,348 INFO L226 Difference]: Without dead ends: 80986 [2021-06-05 23:54:32,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1292.9ms TimeCoverageRelationStatistics Valid=388, Invalid=2062, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:54:32,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80986 states. [2021-06-05 23:54:33,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80986 to 46345. [2021-06-05 23:54:33,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46345 states, 46344 states have (on average 4.133048506818574) internal successors, (191542), 46344 states have internal predecessors, (191542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46345 states to 46345 states and 191542 transitions. [2021-06-05 23:54:33,564 INFO L78 Accepts]: Start accepts. Automaton has 46345 states and 191542 transitions. Word has length 39 [2021-06-05 23:54:33,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:54:33,564 INFO L482 AbstractCegarLoop]: Abstraction has 46345 states and 191542 transitions. [2021-06-05 23:54:33,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:33,564 INFO L276 IsEmpty]: Start isEmpty. Operand 46345 states and 191542 transitions. [2021-06-05 23:54:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:54:33,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:54:33,647 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:54:33,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable786,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:54:33,849 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:54:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:54:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash 673480855, now seen corresponding path program 141 times [2021-06-05 23:54:33,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:54:33,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226657613] [2021-06-05 23:54:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:54:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:54:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:34,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:54:34,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226657613] [2021-06-05 23:54:34,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226657613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:34,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680473715] [2021-06-05 23:54:34,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:54:34,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:54:34,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:54:34,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:54:34,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:54:34,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:54:34,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:34,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:34,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:54:34,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:36 [2021-06-05 23:54:34,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:34,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:34,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-06-05 23:54:34,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:34,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:34,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 23:54:34,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:71 [2021-06-05 23:54:34,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:34,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:54:34,568 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:54:34,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:34,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:54:34,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:54:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:34,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680473715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:34,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:54:34,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:54:34,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105149521] [2021-06-05 23:54:34,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:54:34,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:54:34,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:54:34,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:54:34,623 INFO L87 Difference]: Start difference. First operand 46345 states and 191542 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:37,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:54:37,838 INFO L93 Difference]: Finished difference Result 72795 states and 296922 transitions. [2021-06-05 23:54:37,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:54:37,838 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:54:37,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:54:38,039 INFO L225 Difference]: With dead ends: 72795 [2021-06-05 23:54:38,039 INFO L226 Difference]: Without dead ends: 72412 [2021-06-05 23:54:38,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 2260.3ms TimeCoverageRelationStatistics Valid=516, Invalid=4040, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:54:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72412 states. [2021-06-05 23:54:38,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72412 to 45967. [2021-06-05 23:54:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45967 states, 45966 states have (on average 4.136687986772832) internal successors, (190147), 45966 states have internal predecessors, (190147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 23:54:39,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable790 [2021-06-05 23:54:39,353 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 23:54:39,355 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:54:39,356 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 23:54:39,356 INFO L202 PluginConnector]: Adding new model buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:54:39 BasicIcfg [2021-06-05 23:54:39,356 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:54:39,356 INFO L168 Benchmark]: Toolchain (without parser) took 745062.09 ms. Allocated memory was 385.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 364.4 MB in the beginning and 12.0 GB in the end (delta: -11.6 GB). Peak memory consumption was 4.2 GB. Max. memory is 16.0 GB. [2021-06-05 23:54:39,356 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 385.9 MB. Free memory was 365.6 MB in the beginning and 365.5 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:54:39,356 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.11 ms. Allocated memory is still 385.9 MB. Free memory was 364.3 MB in the beginning and 362.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:54:39,357 INFO L168 Benchmark]: Boogie Preprocessor took 10.82 ms. Allocated memory is still 385.9 MB. Free memory was 362.9 MB in the beginning and 361.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:54:39,357 INFO L168 Benchmark]: RCFGBuilder took 229.68 ms. Allocated memory is still 385.9 MB. Free memory was 361.7 MB in the beginning and 346.3 MB in the end (delta: 15.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 23:54:39,357 INFO L168 Benchmark]: TraceAbstraction took 744799.41 ms. Allocated memory was 385.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 345.8 MB in the beginning and 12.0 GB in the end (delta: -11.6 GB). Peak memory consumption was 4.2 GB. Max. memory is 16.0 GB. [2021-06-05 23:54:39,357 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 0.10 ms. Allocated memory is still 385.9 MB. Free memory was 365.6 MB in the beginning and 365.5 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.11 ms. Allocated memory is still 385.9 MB. Free memory was 364.3 MB in the beginning and 362.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.82 ms. Allocated memory is still 385.9 MB. Free memory was 362.9 MB in the beginning and 361.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 229.68 ms. Allocated memory is still 385.9 MB. Free memory was 361.7 MB in the beginning and 346.3 MB in the end (delta: 15.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 744799.41 ms. Allocated memory was 385.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 345.8 MB in the beginning and 12.0 GB in the end (delta: -11.6 GB). Peak memory consumption was 4.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (40476 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 54 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 744662.1ms, OverallIterations: 150, TraceHistogramMax: 2, EmptinessCheckTime: 11265.2ms, AutomataDifference: 420370.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 55.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11249 SDtfs, 71395 SDslu, 133159 SDs, 0 SdLazy, 246157 SolverSat, 14482 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 118380.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11279 GetRequests, 3839 SyntacticMatches, 173 SemanticMatches, 7267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129818 ImplicationChecksByTransitivity, 268651.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=46345occurred in iteration=149, InterpolantAutomatonStates: 5476, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 158060.8ms AutomataMinimizationTime, 150 MinimizatonAttempts, 5329298 StatesRemovedByMinimization, 149 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 639.3ms SsaConstructionTime, 2606.7ms SatisfiabilityAnalysisTime, 119156.1ms InterpolantComputationTime, 11047 NumberOfCodeBlocks, 11043 NumberOfCodeBlocksAsserted, 537 NumberOfCheckSat, 10753 ConstructedInterpolants, 418 QuantifiedInterpolants, 277407 SizeOfPredicates, 1099 NumberOfNonLiveVariables, 16421 ConjunctsInSsa, 5571 ConjunctsInUnsatCore, 294 InterpolantComputations, 8 PerfectInterpolantSequences, 224/4764 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