/usr/bin/java -Xmx8000000000 -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/prod-cons.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:46:57,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:46:57,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:46:57,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:46:57,505 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 [2021-08-21 12:46:57,520 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:46:57,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:46:57,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:46:57,521 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:46:57,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:46:57,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:46:57,522 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:46:57,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:46:57,522 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:46:57,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:46:57,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:46:57,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:46:57,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:46:57,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:46:57,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:46:57,523 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:46:57,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:46:57,523 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:46:57,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:46:57,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:46:57,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:46:57,524 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:46:57,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:46:57,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:46:57,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:46:57,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:46:57,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:46:57,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:46:57,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:46:57,524 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:46:57,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:46:57,525 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:46:57,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:46:57,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:46:57,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:46:57,795 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:46:57,798 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:46:57,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl [2021-08-21 12:46:57,799 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl' [2021-08-21 12:46:57,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:46:57,828 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:46:57,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:46:57,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:46:57,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:46:57,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:46:57" (1/1) ... [2021-08-21 12:46:57,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:46:57" (1/1) ... [2021-08-21 12:46:57,850 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:46:57,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:46:57,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:46:57,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:46:57,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:46:57" (1/1) ... [2021-08-21 12:46:57,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:46:57" (1/1) ... [2021-08-21 12:46:57,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:46:57" (1/1) ... [2021-08-21 12:46:57,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:46:57" (1/1) ... [2021-08-21 12:46:57,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:46:57" (1/1) ... [2021-08-21 12:46:57,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:46:57" (1/1) ... [2021-08-21 12:46:57,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:46:57" (1/1) ... [2021-08-21 12:46:57,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:46:57,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:46:57,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:46:57,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:46:57,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:46:57" (1/1) ... [2021-08-21 12:46:57,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:46:57,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:57,891 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 12:46:57,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 12:46:57,931 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:46:57,931 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:46:57,931 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:46:57,931 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:46:57,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:46:57,932 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:46:57,932 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:46:57,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:46:57,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:46:57,932 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:46:57,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:46:57,932 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:46:57,933 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:46:58,060 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:46:58,060 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:46:58,062 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:46:58 BoogieIcfgContainer [2021-08-21 12:46:58,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:46:58,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:46:58,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:46:58,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:46:58,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:46:57" (1/2) ... [2021-08-21 12:46:58,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e489c9 and model type prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:46:58, skipping insertion in model container [2021-08-21 12:46:58,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:46:58" (2/2) ... [2021-08-21 12:46:58,067 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons.wvr.bpl [2021-08-21 12:46:58,070 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:46:58,070 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:46:58,070 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:46:58,070 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:46:58,105 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 12:46:58,134 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:46:58,139 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 12:46:58,139 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 12:46:58,146 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 30 transitions, 84 flow [2021-08-21 12:46:58,186 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 132 states, 131 states have (on average 2.5877862595419847) internal successors, (339), 131 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:58,189 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 131 states have (on average 2.5877862595419847) internal successors, (339), 131 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:58,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:46:58,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:58,196 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:58,197 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:46:58,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:58,200 INFO L82 PathProgramCache]: Analyzing trace with hash 785752709, now seen corresponding path program 1 times [2021-08-21 12:46:58,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:58,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112688174] [2021-08-21 12:46:58,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:58,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:58,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:58,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112688174] [2021-08-21 12:46:58,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112688174] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:46:58,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:46:58,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:46:58,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284161924] [2021-08-21 12:46:58,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:46:58,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:58,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:46:58,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:46:58,356 INFO L87 Difference]: Start difference. First operand has 132 states, 131 states have (on average 2.5877862595419847) internal successors, (339), 131 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2021-08-21 12:46:58,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:58,409 INFO L93 Difference]: Finished difference Result 172 states and 413 transitions. [2021-08-21 12:46:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:46:58,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 [2021-08-21 12:46:58,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:58,420 INFO L225 Difference]: With dead ends: 172 [2021-08-21 12:46:58,420 INFO L226 Difference]: Without dead ends: 109 [2021-08-21 12:46:58,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:46:58,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-21 12:46:58,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-08-21 12:46:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.3055555555555554) internal successors, (249), 108 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 249 transitions. [2021-08-21 12:46:58,465 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 249 transitions. Word has length 19 [2021-08-21 12:46:58,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:58,465 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 249 transitions. [2021-08-21 12:46:58,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2021-08-21 12:46:58,466 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 249 transitions. [2021-08-21 12:46:58,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:46:58,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:58,468 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:58,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:46:58,469 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:46:58,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:58,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1380410419, now seen corresponding path program 2 times [2021-08-21 12:46:58,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:58,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333688041] [2021-08-21 12:46:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:58,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:58,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:58,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333688041] [2021-08-21 12:46:58,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333688041] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:46:58,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:46:58,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:46:58,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806217390] [2021-08-21 12:46:58,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:46:58,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:58,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:46:58,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:46:58,539 INFO L87 Difference]: Start difference. First operand 109 states and 249 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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) [2021-08-21 12:46:58,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:58,596 INFO L93 Difference]: Finished difference Result 190 states and 436 transitions. [2021-08-21 12:46:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:46:58,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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 [2021-08-21 12:46:58,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:58,604 INFO L225 Difference]: With dead ends: 190 [2021-08-21 12:46:58,604 INFO L226 Difference]: Without dead ends: 142 [2021-08-21 12:46:58,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:46:58,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-21 12:46:58,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-08-21 12:46:58,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3404255319148937) internal successors, (330), 141 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:58,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 330 transitions. [2021-08-21 12:46:58,624 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 330 transitions. Word has length 19 [2021-08-21 12:46:58,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:58,624 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 330 transitions. [2021-08-21 12:46:58,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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) [2021-08-21 12:46:58,624 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 330 transitions. [2021-08-21 12:46:58,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:46:58,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:58,629 INFO L512 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] [2021-08-21 12:46:58,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:46:58,630 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:46:58,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:58,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1081760350, now seen corresponding path program 1 times [2021-08-21 12:46:58,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:58,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314531845] [2021-08-21 12:46:58,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:58,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:58,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:58,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314531845] [2021-08-21 12:46:58,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314531845] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:46:58,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:46:58,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:46:58,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062210816] [2021-08-21 12:46:58,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:46:58,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:58,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:46:58,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:46:58,672 INFO L87 Difference]: Start difference. First operand 142 states and 330 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:58,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:58,682 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2021-08-21 12:46:58,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:46:58,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:46:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:58,684 INFO L225 Difference]: With dead ends: 164 [2021-08-21 12:46:58,684 INFO L226 Difference]: Without dead ends: 152 [2021-08-21 12:46:58,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:46:58,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-21 12:46:58,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-08-21 12:46:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.3178807947019866) internal successors, (350), 151 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 350 transitions. [2021-08-21 12:46:58,698 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 350 transitions. Word has length 22 [2021-08-21 12:46:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:58,698 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 350 transitions. [2021-08-21 12:46:58,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:58,698 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 350 transitions. [2021-08-21 12:46:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:46:58,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:58,699 INFO L512 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] [2021-08-21 12:46:58,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:46:58,699 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:46:58,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:58,699 INFO L82 PathProgramCache]: Analyzing trace with hash -220317154, now seen corresponding path program 1 times [2021-08-21 12:46:58,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:58,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842473145] [2021-08-21 12:46:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:58,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:58,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:58,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842473145] [2021-08-21 12:46:58,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842473145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:58,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994100993] [2021-08-21 12:46:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:58,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:58,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:58,841 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:58,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:46:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:58,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:46:58,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:59,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:46:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:59,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994100993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:59,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:59,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 12:46:59,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810174293] [2021-08-21 12:46:59,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:46:59,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:59,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:46:59,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:46:59,343 INFO L87 Difference]: Start difference. First operand 152 states and 350 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:59,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:59,538 INFO L93 Difference]: Finished difference Result 302 states and 708 transitions. [2021-08-21 12:46:59,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:46:59,538 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:46:59,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:59,539 INFO L225 Difference]: With dead ends: 302 [2021-08-21 12:46:59,539 INFO L226 Difference]: Without dead ends: 218 [2021-08-21 12:46:59,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 248.9ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:46:59,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-21 12:46:59,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 185. [2021-08-21 12:46:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.342391304347826) internal successors, (431), 184 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 431 transitions. [2021-08-21 12:46:59,545 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 431 transitions. Word has length 25 [2021-08-21 12:46:59,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:59,545 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 431 transitions. [2021-08-21 12:46:59,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:59,546 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 431 transitions. [2021-08-21 12:46:59,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:46:59,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:59,546 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 12:46:59,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 12:46:59,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:59,761 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:46:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:59,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1335000105, now seen corresponding path program 2 times [2021-08-21 12:46:59,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:59,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745124712] [2021-08-21 12:46:59,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:59,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:59,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:59,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745124712] [2021-08-21 12:46:59,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745124712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:59,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210867110] [2021-08-21 12:46:59,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:46:59,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:59,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:59,813 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:59,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 12:46:59,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:46:59,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:59,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:46:59,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:59,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210867110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:59,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:59,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:46:59,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256091878] [2021-08-21 12:46:59,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:46:59,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:59,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:46:59,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:46:59,980 INFO L87 Difference]: Start difference. First operand 185 states and 431 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:59,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:59,989 INFO L93 Difference]: Finished difference Result 496 states and 1143 transitions. [2021-08-21 12:46:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:46:59,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 12:46:59,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:59,991 INFO L225 Difference]: With dead ends: 496 [2021-08-21 12:46:59,992 INFO L226 Difference]: Without dead ends: 454 [2021-08-21 12:46:59,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:46:59,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-21 12:47:00,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 336. [2021-08-21 12:47:00,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.4298507462686567) internal successors, (814), 335 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 814 transitions. [2021-08-21 12:47:00,002 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 814 transitions. Word has length 28 [2021-08-21 12:47:00,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:00,002 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 814 transitions. [2021-08-21 12:47:00,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:00,002 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 814 transitions. [2021-08-21 12:47:00,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:47:00,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:00,003 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 12:47:00,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:00,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:00,221 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:00,221 INFO L82 PathProgramCache]: Analyzing trace with hash -528291211, now seen corresponding path program 3 times [2021-08-21 12:47:00,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:00,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413609230] [2021-08-21 12:47:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:00,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:00,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:00,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413609230] [2021-08-21 12:47:00,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413609230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:00,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91551304] [2021-08-21 12:47:00,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:47:00,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:00,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:00,525 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:00,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 12:47:00,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:47:00,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:00,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:47:00,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:01,026 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:01,026 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 25 treesize of output 13 [2021-08-21 12:47:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:01,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91551304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:01,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:01,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-21 12:47:01,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255519140] [2021-08-21 12:47:01,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:47:01,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:01,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:47:01,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:47:01,117 INFO L87 Difference]: Start difference. First operand 336 states and 814 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-08-21 12:47:03,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:03,260 INFO L93 Difference]: Finished difference Result 1720 states and 4262 transitions. [2021-08-21 12:47:03,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-21 12:47:03,261 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 31 [2021-08-21 12:47:03,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:03,265 INFO L225 Difference]: With dead ends: 1720 [2021-08-21 12:47:03,265 INFO L226 Difference]: Without dead ends: 1181 [2021-08-21 12:47:03,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 1777.7ms TimeCoverageRelationStatistics Valid=1330, Invalid=5642, Unknown=0, NotChecked=0, Total=6972 [2021-08-21 12:47:03,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-08-21 12:47:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 409. [2021-08-21 12:47:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.4534313725490198) internal successors, (1001), 408 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:03,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1001 transitions. [2021-08-21 12:47:03,279 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1001 transitions. Word has length 31 [2021-08-21 12:47:03,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:03,280 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1001 transitions. [2021-08-21 12:47:03,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-08-21 12:47:03,280 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1001 transitions. [2021-08-21 12:47:03,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:47:03,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:03,281 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 12:47:03,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:03,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:03,497 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:03,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:03,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1420855431, now seen corresponding path program 4 times [2021-08-21 12:47:03,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:03,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214084367] [2021-08-21 12:47:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:03,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:03,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:03,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214084367] [2021-08-21 12:47:03,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214084367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:03,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519194990] [2021-08-21 12:47:03,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:47:03,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:03,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:03,718 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:03,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 12:47:03,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:47:03,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:03,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:47:03,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:04,219 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:04,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:47:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:04,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519194990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:04,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:04,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-21 12:47:04,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792935338] [2021-08-21 12:47:04,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:47:04,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:04,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:47:04,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:47:04,303 INFO L87 Difference]: Start difference. First operand 409 states and 1001 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-08-21 12:47:05,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:05,852 INFO L93 Difference]: Finished difference Result 1293 states and 3137 transitions. [2021-08-21 12:47:05,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 12:47:05,852 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 31 [2021-08-21 12:47:05,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:05,860 INFO L225 Difference]: With dead ends: 1293 [2021-08-21 12:47:05,860 INFO L226 Difference]: Without dead ends: 1200 [2021-08-21 12:47:05,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1316.8ms TimeCoverageRelationStatistics Valid=1047, Invalid=4065, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 12:47:05,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-08-21 12:47:05,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 413. [2021-08-21 12:47:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.4490291262135924) internal successors, (1009), 412 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1009 transitions. [2021-08-21 12:47:05,875 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1009 transitions. Word has length 31 [2021-08-21 12:47:05,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:05,875 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1009 transitions. [2021-08-21 12:47:05,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-08-21 12:47:05,876 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1009 transitions. [2021-08-21 12:47:05,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:47:05,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:05,876 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 12:47:05,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:06,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:06,082 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:06,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:06,083 INFO L82 PathProgramCache]: Analyzing trace with hash 256367733, now seen corresponding path program 5 times [2021-08-21 12:47:06,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:06,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138102588] [2021-08-21 12:47:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:06,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:06,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:06,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138102588] [2021-08-21 12:47:06,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138102588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:06,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639701872] [2021-08-21 12:47:06,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:47:06,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:06,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:06,266 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:06,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 12:47:06,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:47:06,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:06,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:47:06,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:06,935 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 12:47:06,935 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 24 [2021-08-21 12:47:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:07,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639701872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:07,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:07,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-21 12:47:07,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588942152] [2021-08-21 12:47:07,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:47:07,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:07,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:47:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:47:07,024 INFO L87 Difference]: Start difference. First operand 413 states and 1009 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-08-21 12:47:09,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:09,329 INFO L93 Difference]: Finished difference Result 3428 states and 8347 transitions. [2021-08-21 12:47:09,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-21 12:47:09,329 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 31 [2021-08-21 12:47:09,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:09,340 INFO L225 Difference]: With dead ends: 3428 [2021-08-21 12:47:09,340 INFO L226 Difference]: Without dead ends: 2445 [2021-08-21 12:47:09,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2988 ImplicationChecksByTransitivity, 1837.1ms TimeCoverageRelationStatistics Valid=1636, Invalid=7106, Unknown=0, NotChecked=0, Total=8742 [2021-08-21 12:47:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-08-21 12:47:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 445. [2021-08-21 12:47:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.463963963963964) internal successors, (1094), 444 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:09,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1094 transitions. [2021-08-21 12:47:09,361 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1094 transitions. Word has length 31 [2021-08-21 12:47:09,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:09,361 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 1094 transitions. [2021-08-21 12:47:09,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-08-21 12:47:09,361 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1094 transitions. [2021-08-21 12:47:09,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:47:09,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:09,362 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 12:47:09,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:09,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:09,577 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:09,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:09,577 INFO L82 PathProgramCache]: Analyzing trace with hash 693727769, now seen corresponding path program 6 times [2021-08-21 12:47:09,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:09,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787428624] [2021-08-21 12:47:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:09,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:47:09,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:09,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787428624] [2021-08-21 12:47:09,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787428624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:09,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794923605] [2021-08-21 12:47:09,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:47:09,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:09,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:09,742 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:09,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 12:47:09,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:47:09,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:09,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:47:09,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:10,298 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:10,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 13 [2021-08-21 12:47:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:10,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794923605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:10,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:10,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-21 12:47:10,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462238213] [2021-08-21 12:47:10,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:47:10,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:10,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:47:10,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:47:10,389 INFO L87 Difference]: Start difference. First operand 445 states and 1094 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-08-21 12:47:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:12,371 INFO L93 Difference]: Finished difference Result 2497 states and 6083 transitions. [2021-08-21 12:47:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-21 12:47:12,371 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 31 [2021-08-21 12:47:12,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:12,379 INFO L225 Difference]: With dead ends: 2497 [2021-08-21 12:47:12,379 INFO L226 Difference]: Without dead ends: 2112 [2021-08-21 12:47:12,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3111 ImplicationChecksByTransitivity, 1689.2ms TimeCoverageRelationStatistics Valid=1578, Invalid=6978, Unknown=0, NotChecked=0, Total=8556 [2021-08-21 12:47:12,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-08-21 12:47:12,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 573. [2021-08-21 12:47:12,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.4737762237762237) internal successors, (1415), 572 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:12,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1415 transitions. [2021-08-21 12:47:12,398 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1415 transitions. Word has length 31 [2021-08-21 12:47:12,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:12,398 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 1415 transitions. [2021-08-21 12:47:12,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-08-21 12:47:12,399 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1415 transitions. [2021-08-21 12:47:12,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:47:12,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:12,400 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 12:47:12,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:12,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:12,617 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:12,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:12,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2111481487, now seen corresponding path program 7 times [2021-08-21 12:47:12,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:12,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497059261] [2021-08-21 12:47:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:12,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:12,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:12,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497059261] [2021-08-21 12:47:12,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497059261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:12,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359335085] [2021-08-21 12:47:12,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:47:12,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:12,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:12,831 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:12,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 12:47:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:13,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:47:13,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:13,449 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:13,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:47:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:13,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359335085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:13,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:13,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-21 12:47:13,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038740288] [2021-08-21 12:47:13,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:47:13,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:13,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:47:13,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:47:13,538 INFO L87 Difference]: Start difference. First operand 573 states and 1415 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-08-21 12:47:15,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:15,154 INFO L93 Difference]: Finished difference Result 2289 states and 5693 transitions. [2021-08-21 12:47:15,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 12:47:15,156 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 31 [2021-08-21 12:47:15,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:15,161 INFO L225 Difference]: With dead ends: 2289 [2021-08-21 12:47:15,161 INFO L226 Difference]: Without dead ends: 1584 [2021-08-21 12:47:15,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1347.4ms TimeCoverageRelationStatistics Valid=1152, Invalid=4854, Unknown=0, NotChecked=0, Total=6006 [2021-08-21 12:47:15,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-08-21 12:47:15,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 605. [2021-08-21 12:47:15,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.468543046357616) internal successors, (1491), 604 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:15,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1491 transitions. [2021-08-21 12:47:15,177 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1491 transitions. Word has length 31 [2021-08-21 12:47:15,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:15,177 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 1491 transitions. [2021-08-21 12:47:15,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-08-21 12:47:15,177 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1491 transitions. [2021-08-21 12:47:15,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:47:15,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:15,178 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 12:47:15,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:15,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:15,393 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:15,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:15,393 INFO L82 PathProgramCache]: Analyzing trace with hash -911119041, now seen corresponding path program 8 times [2021-08-21 12:47:15,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:15,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210590410] [2021-08-21 12:47:15,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:15,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:47:15,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:15,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210590410] [2021-08-21 12:47:15,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210590410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:15,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385144911] [2021-08-21 12:47:15,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:47:15,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:15,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:15,561 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:15,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 12:47:15,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:47:15,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:15,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:47:15,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:16,149 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 12:47:16,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 12:47:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:16,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385144911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:16,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:16,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-21 12:47:16,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082464283] [2021-08-21 12:47:16,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:47:16,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:16,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:47:16,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:47:16,237 INFO L87 Difference]: Start difference. First operand 605 states and 1491 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-08-21 12:47:17,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:17,668 INFO L93 Difference]: Finished difference Result 2332 states and 5648 transitions. [2021-08-21 12:47:17,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 12:47:17,669 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 31 [2021-08-21 12:47:17,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:17,675 INFO L225 Difference]: With dead ends: 2332 [2021-08-21 12:47:17,681 INFO L226 Difference]: Without dead ends: 1883 [2021-08-21 12:47:17,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 1178.7ms TimeCoverageRelationStatistics Valid=1008, Invalid=4248, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 12:47:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-08-21 12:47:17,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 643. [2021-08-21 12:47:17,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.454828660436137) internal successors, (1576), 642 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:17,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1576 transitions. [2021-08-21 12:47:17,707 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1576 transitions. Word has length 31 [2021-08-21 12:47:17,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:17,707 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1576 transitions. [2021-08-21 12:47:17,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-08-21 12:47:17,707 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1576 transitions. [2021-08-21 12:47:17,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:47:17,708 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:17,708 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:17,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:17,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 12:47:17,929 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:17,929 INFO L82 PathProgramCache]: Analyzing trace with hash -2139987936, now seen corresponding path program 9 times [2021-08-21 12:47:17,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:17,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225517593] [2021-08-21 12:47:17,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:17,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:17,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:17,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225517593] [2021-08-21 12:47:17,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225517593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:17,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082865630] [2021-08-21 12:47:17,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:47:17,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:17,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:17,961 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:17,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 12:47:18,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:47:18,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:18,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:47:18,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:18,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082865630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:18,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:18,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 12:47:18,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774756303] [2021-08-21 12:47:18,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:47:18,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:18,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:47:18,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:47:18,333 INFO L87 Difference]: Start difference. First operand 643 states and 1576 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 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) [2021-08-21 12:47:18,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:18,344 INFO L93 Difference]: Finished difference Result 1162 states and 2791 transitions. [2021-08-21 12:47:18,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:47:18,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 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 34 [2021-08-21 12:47:18,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:18,348 INFO L225 Difference]: With dead ends: 1162 [2021-08-21 12:47:18,348 INFO L226 Difference]: Without dead ends: 1105 [2021-08-21 12:47:18,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:47:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-08-21 12:47:18,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 768. [2021-08-21 12:47:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 2.4771838331160363) internal successors, (1900), 767 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:18,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1900 transitions. [2021-08-21 12:47:18,361 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1900 transitions. Word has length 34 [2021-08-21 12:47:18,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:18,361 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 1900 transitions. [2021-08-21 12:47:18,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 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) [2021-08-21 12:47:18,361 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1900 transitions. [2021-08-21 12:47:18,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:47:18,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:18,363 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:18,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:18,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:18,577 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:18,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:18,577 INFO L82 PathProgramCache]: Analyzing trace with hash -293873602, now seen corresponding path program 10 times [2021-08-21 12:47:18,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:18,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124884238] [2021-08-21 12:47:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:18,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:18,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:18,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124884238] [2021-08-21 12:47:18,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124884238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:18,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018832005] [2021-08-21 12:47:18,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:47:18,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:18,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:18,837 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:18,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 12:47:19,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:47:19,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:19,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:47:19,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:19,717 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 12:47:19,717 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 38 treesize of output 18 [2021-08-21 12:47:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:19,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018832005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:19,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:19,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-21 12:47:19,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762039610] [2021-08-21 12:47:19,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:47:19,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:19,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:47:19,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:47:19,812 INFO L87 Difference]: Start difference. First operand 768 states and 1900 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2021-08-21 12:47:23,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:23,977 INFO L93 Difference]: Finished difference Result 4022 states and 9925 transitions. [2021-08-21 12:47:23,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-08-21 12:47:23,978 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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 37 [2021-08-21 12:47:23,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:23,988 INFO L225 Difference]: With dead ends: 4022 [2021-08-21 12:47:23,988 INFO L226 Difference]: Without dead ends: 3406 [2021-08-21 12:47:23,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5970 ImplicationChecksByTransitivity, 3253.6ms TimeCoverageRelationStatistics Valid=2702, Invalid=15120, Unknown=0, NotChecked=0, Total=17822 [2021-08-21 12:47:23,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2021-08-21 12:47:24,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 917. [2021-08-21 12:47:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 2.5010917030567685) internal successors, (2291), 916 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2291 transitions. [2021-08-21 12:47:24,016 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2291 transitions. Word has length 37 [2021-08-21 12:47:24,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:24,017 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 2291 transitions. [2021-08-21 12:47:24,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2021-08-21 12:47:24,017 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2291 transitions. [2021-08-21 12:47:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:47:24,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:24,018 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:24,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:24,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 12:47:24,237 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:24,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:24,237 INFO L82 PathProgramCache]: Analyzing trace with hash 609080936, now seen corresponding path program 11 times [2021-08-21 12:47:24,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:24,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995400733] [2021-08-21 12:47:24,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:24,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:24,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:24,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995400733] [2021-08-21 12:47:24,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995400733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:24,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669717602] [2021-08-21 12:47:24,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:47:24,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:24,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:24,517 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:24,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 12:47:24,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:47:24,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:24,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:47:24,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:25,481 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 12:47:25,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-21 12:47:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:25,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669717602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:25,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:25,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-21 12:47:25,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036553656] [2021-08-21 12:47:25,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:47:25,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:25,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:47:25,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:47:25,575 INFO L87 Difference]: Start difference. First operand 917 states and 2291 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-21 12:47:30,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:30,124 INFO L93 Difference]: Finished difference Result 5303 states and 13118 transitions. [2021-08-21 12:47:30,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-08-21 12:47:30,124 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 37 [2021-08-21 12:47:30,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:30,138 INFO L225 Difference]: With dead ends: 5303 [2021-08-21 12:47:30,138 INFO L226 Difference]: Without dead ends: 4548 [2021-08-21 12:47:30,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5897 ImplicationChecksByTransitivity, 3704.2ms TimeCoverageRelationStatistics Valid=2899, Invalid=15191, Unknown=0, NotChecked=0, Total=18090 [2021-08-21 12:47:30,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2021-08-21 12:47:30,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 967. [2021-08-21 12:47:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 2.5134575569358177) internal successors, (2428), 966 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 2428 transitions. [2021-08-21 12:47:30,169 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 2428 transitions. Word has length 37 [2021-08-21 12:47:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:30,169 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 2428 transitions. [2021-08-21 12:47:30,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-21 12:47:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 2428 transitions. [2021-08-21 12:47:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:47:30,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:30,170 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:30,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:30,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 12:47:30,393 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:30,393 INFO L82 PathProgramCache]: Analyzing trace with hash 725042942, now seen corresponding path program 12 times [2021-08-21 12:47:30,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:30,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648134411] [2021-08-21 12:47:30,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:30,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:30,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:30,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648134411] [2021-08-21 12:47:30,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648134411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:30,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344725844] [2021-08-21 12:47:30,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:47:30,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:30,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:30,706 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:30,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 12:47:31,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:47:31,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:31,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:47:31,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:32,265 INFO L354 Elim1Store]: treesize reduction 74, result has 8.6 percent of original size [2021-08-21 12:47:32,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 49 [2021-08-21 12:47:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:32,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344725844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:32,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:32,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-21 12:47:32,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438432214] [2021-08-21 12:47:32,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:47:32,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:32,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:47:32,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:47:32,355 INFO L87 Difference]: Start difference. First operand 967 states and 2428 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-21 12:47:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:37,394 INFO L93 Difference]: Finished difference Result 6115 states and 15357 transitions. [2021-08-21 12:47:37,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-08-21 12:47:37,394 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 37 [2021-08-21 12:47:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:37,404 INFO L225 Difference]: With dead ends: 6115 [2021-08-21 12:47:37,405 INFO L226 Difference]: Without dead ends: 5424 [2021-08-21 12:47:37,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 3890.4ms TimeCoverageRelationStatistics Valid=2865, Invalid=16595, Unknown=0, NotChecked=0, Total=19460 [2021-08-21 12:47:37,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5424 states. [2021-08-21 12:47:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5424 to 1131. [2021-08-21 12:47:37,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 2.545132743362832) internal successors, (2876), 1130 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:37,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 2876 transitions. [2021-08-21 12:47:37,445 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 2876 transitions. Word has length 37 [2021-08-21 12:47:37,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:37,445 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 2876 transitions. [2021-08-21 12:47:37,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-21 12:47:37,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 2876 transitions. [2021-08-21 12:47:37,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:47:37,447 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:37,447 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:37,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:37,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 12:47:37,658 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:37,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:37,658 INFO L82 PathProgramCache]: Analyzing trace with hash -2026265026, now seen corresponding path program 13 times [2021-08-21 12:47:37,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:37,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018175533] [2021-08-21 12:47:37,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:37,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:37,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:37,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018175533] [2021-08-21 12:47:37,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018175533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:37,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599853765] [2021-08-21 12:47:37,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:47:37,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:37,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:37,916 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:37,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 12:47:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:38,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:47:38,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:38,977 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 12:47:38,977 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 38 treesize of output 18 [2021-08-21 12:47:39,054 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:39,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599853765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:39,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:39,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-21 12:47:39,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750825064] [2021-08-21 12:47:39,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:47:39,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:39,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:47:39,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:47:39,056 INFO L87 Difference]: Start difference. First operand 1131 states and 2876 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2021-08-21 12:47:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:44,703 INFO L93 Difference]: Finished difference Result 8166 states and 20369 transitions. [2021-08-21 12:47:44,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-08-21 12:47:44,704 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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 37 [2021-08-21 12:47:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:44,716 INFO L225 Difference]: With dead ends: 8166 [2021-08-21 12:47:44,716 INFO L226 Difference]: Without dead ends: 6535 [2021-08-21 12:47:44,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11291 ImplicationChecksByTransitivity, 4816.0ms TimeCoverageRelationStatistics Valid=4762, Invalid=24308, Unknown=0, NotChecked=0, Total=29070 [2021-08-21 12:47:44,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6535 states. [2021-08-21 12:47:44,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6535 to 1189. [2021-08-21 12:47:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.547979797979798) internal successors, (3027), 1188 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:44,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3027 transitions. [2021-08-21 12:47:44,761 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3027 transitions. Word has length 37 [2021-08-21 12:47:44,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:44,761 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 3027 transitions. [2021-08-21 12:47:44,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2021-08-21 12:47:44,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3027 transitions. [2021-08-21 12:47:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:47:44,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:44,763 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:44,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-21 12:47:44,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 12:47:44,977 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:44,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:44,977 INFO L82 PathProgramCache]: Analyzing trace with hash 730758682, now seen corresponding path program 14 times [2021-08-21 12:47:44,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:44,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960667625] [2021-08-21 12:47:44,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:44,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:47:45,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:45,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960667625] [2021-08-21 12:47:45,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960667625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:45,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893301877] [2021-08-21 12:47:45,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:47:45,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:45,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:45,219 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:45,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 12:47:45,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:47:45,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:45,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:47:45,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:46,317 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 12:47:46,318 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 38 treesize of output 18 [2021-08-21 12:47:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:46,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893301877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:46,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:46,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-21 12:47:46,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572057141] [2021-08-21 12:47:46,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:47:46,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:46,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:47:46,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:47:46,399 INFO L87 Difference]: Start difference. First operand 1189 states and 3027 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2021-08-21 12:47:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:51,301 INFO L93 Difference]: Finished difference Result 6376 states and 15972 transitions. [2021-08-21 12:47:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-08-21 12:47:51,302 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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 37 [2021-08-21 12:47:51,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:51,313 INFO L225 Difference]: With dead ends: 6376 [2021-08-21 12:47:51,313 INFO L226 Difference]: Without dead ends: 5496 [2021-08-21 12:47:51,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8366 ImplicationChecksByTransitivity, 3999.9ms TimeCoverageRelationStatistics Valid=3701, Invalid=18649, Unknown=0, NotChecked=0, Total=22350 [2021-08-21 12:47:51,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5496 states. [2021-08-21 12:47:51,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5496 to 1237. [2021-08-21 12:47:51,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 2.544498381877023) internal successors, (3145), 1236 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:51,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 3145 transitions. [2021-08-21 12:47:51,357 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 3145 transitions. Word has length 37 [2021-08-21 12:47:51,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:51,357 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 3145 transitions. [2021-08-21 12:47:51,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2021-08-21 12:47:51,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 3145 transitions. [2021-08-21 12:47:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:47:51,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:51,359 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:51,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:51,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:51,563 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:51,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:51,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1515417626, now seen corresponding path program 15 times [2021-08-21 12:47:51,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:51,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76322437] [2021-08-21 12:47:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:51,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:51,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:51,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76322437] [2021-08-21 12:47:51,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76322437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:51,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17862929] [2021-08-21 12:47:51,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:47:51,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:51,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:51,789 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:51,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 12:47:52,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:47:52,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:52,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:47:52,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:53,032 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 12:47:53,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 32 [2021-08-21 12:47:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:53,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17862929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:53,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:53,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-21 12:47:53,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90566635] [2021-08-21 12:47:53,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:47:53,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:53,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:47:53,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:47:53,115 INFO L87 Difference]: Start difference. First operand 1237 states and 3145 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2021-08-21 12:47:57,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:57,412 INFO L93 Difference]: Finished difference Result 8557 states and 21467 transitions. [2021-08-21 12:47:57,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-08-21 12:47:57,413 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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 37 [2021-08-21 12:47:57,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:57,440 INFO L225 Difference]: With dead ends: 8557 [2021-08-21 12:47:57,440 INFO L226 Difference]: Without dead ends: 7184 [2021-08-21 12:47:57,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8761 ImplicationChecksByTransitivity, 3371.3ms TimeCoverageRelationStatistics Valid=3316, Invalid=19034, Unknown=0, NotChecked=0, Total=22350 [2021-08-21 12:47:57,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7184 states. [2021-08-21 12:47:57,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7184 to 1793. [2021-08-21 12:47:57,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1793 states, 1792 states have (on average 2.568638392857143) internal successors, (4603), 1792 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:57,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1793 states to 1793 states and 4603 transitions. [2021-08-21 12:47:57,488 INFO L78 Accepts]: Start accepts. Automaton has 1793 states and 4603 transitions. Word has length 37 [2021-08-21 12:47:57,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:57,488 INFO L470 AbstractCegarLoop]: Abstraction has 1793 states and 4603 transitions. [2021-08-21 12:47:57,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2021-08-21 12:47:57,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1793 states and 4603 transitions. [2021-08-21 12:47:57,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:47:57,491 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:57,491 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:57,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:57,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 12:47:57,704 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:47:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:57,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1952777662, now seen corresponding path program 16 times [2021-08-21 12:47:57,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:57,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331532476] [2021-08-21 12:47:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:57,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:47:57,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:57,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331532476] [2021-08-21 12:47:57,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331532476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:57,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169794481] [2021-08-21 12:47:57,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:47:57,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:57,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:57,930 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:47:57,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 12:47:58,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:47:58,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:58,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:47:58,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:59,095 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 12:47:59,095 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 38 treesize of output 18 [2021-08-21 12:47:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:59,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169794481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:59,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:59,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-08-21 12:47:59,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808949427] [2021-08-21 12:47:59,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:47:59,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:59,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:47:59,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:47:59,169 INFO L87 Difference]: Start difference. First operand 1793 states and 4603 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 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) [2021-08-21 12:48:03,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:03,185 INFO L93 Difference]: Finished difference Result 7918 states and 19958 transitions. [2021-08-21 12:48:03,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-08-21 12:48:03,186 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 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 37 [2021-08-21 12:48:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:03,195 INFO L225 Difference]: With dead ends: 7918 [2021-08-21 12:48:03,196 INFO L226 Difference]: Without dead ends: 7014 [2021-08-21 12:48:03,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7809 ImplicationChecksByTransitivity, 3256.2ms TimeCoverageRelationStatistics Valid=2843, Invalid=17463, Unknown=0, NotChecked=0, Total=20306 [2021-08-21 12:48:03,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7014 states. [2021-08-21 12:48:03,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7014 to 2257. [2021-08-21 12:48:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 2.5877659574468086) internal successors, (5838), 2256 states have internal predecessors, (5838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 5838 transitions. [2021-08-21 12:48:03,258 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 5838 transitions. Word has length 37 [2021-08-21 12:48:03,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:03,258 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 5838 transitions. [2021-08-21 12:48:03,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 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) [2021-08-21 12:48:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 5838 transitions. [2021-08-21 12:48:03,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:48:03,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:03,262 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:03,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:03,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:03,477 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:03,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:03,477 INFO L82 PathProgramCache]: Analyzing trace with hash 732190768, now seen corresponding path program 17 times [2021-08-21 12:48:03,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:03,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614189326] [2021-08-21 12:48:03,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:03,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:03,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:03,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614189326] [2021-08-21 12:48:03,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614189326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:03,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919146032] [2021-08-21 12:48:03,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:48:03,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:03,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:03,707 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:03,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 12:48:04,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:48:04,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:04,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:48:04,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:04,956 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 12:48:04,956 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 38 treesize of output 18 [2021-08-21 12:48:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:05,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919146032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:05,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:05,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-21 12:48:05,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785109675] [2021-08-21 12:48:05,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:48:05,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:05,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:48:05,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:48:05,042 INFO L87 Difference]: Start difference. First operand 2257 states and 5838 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2021-08-21 12:48:08,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:08,778 INFO L93 Difference]: Finished difference Result 8863 states and 22622 transitions. [2021-08-21 12:48:08,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-08-21 12:48:08,779 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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 37 [2021-08-21 12:48:08,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:08,791 INFO L225 Difference]: With dead ends: 8863 [2021-08-21 12:48:08,791 INFO L226 Difference]: Without dead ends: 7892 [2021-08-21 12:48:08,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6030 ImplicationChecksByTransitivity, 3042.2ms TimeCoverageRelationStatistics Valid=2478, Invalid=14552, Unknown=0, NotChecked=0, Total=17030 [2021-08-21 12:48:08,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7892 states. [2021-08-21 12:48:08,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7892 to 2527. [2021-08-21 12:48:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2527 states, 2526 states have (on average 2.5866983372921615) internal successors, (6534), 2526 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:08,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2527 states to 2527 states and 6534 transitions. [2021-08-21 12:48:08,862 INFO L78 Accepts]: Start accepts. Automaton has 2527 states and 6534 transitions. Word has length 37 [2021-08-21 12:48:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:08,862 INFO L470 AbstractCegarLoop]: Abstraction has 2527 states and 6534 transitions. [2021-08-21 12:48:08,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2021-08-21 12:48:08,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2527 states and 6534 transitions. [2021-08-21 12:48:08,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:48:08,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:08,866 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:08,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:09,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:09,081 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:09,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:09,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1932553214, now seen corresponding path program 18 times [2021-08-21 12:48:09,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:09,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115761154] [2021-08-21 12:48:09,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:09,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:48:09,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:09,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115761154] [2021-08-21 12:48:09,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115761154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:09,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549836118] [2021-08-21 12:48:09,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:48:09,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:09,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:09,301 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:09,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 12:48:09,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:48:09,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:09,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:48:09,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:10,553 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 12:48:10,553 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 38 treesize of output 18 [2021-08-21 12:48:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:10,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549836118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:10,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:10,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-08-21 12:48:10,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695182244] [2021-08-21 12:48:10,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:48:10,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:10,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:48:10,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:48:10,631 INFO L87 Difference]: Start difference. First operand 2527 states and 6534 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) 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) [2021-08-21 12:48:13,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:13,810 INFO L93 Difference]: Finished difference Result 8104 states and 20551 transitions. [2021-08-21 12:48:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-08-21 12:48:13,811 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) 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 37 [2021-08-21 12:48:13,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:13,822 INFO L225 Difference]: With dead ends: 8104 [2021-08-21 12:48:13,822 INFO L226 Difference]: Without dead ends: 7324 [2021-08-21 12:48:13,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4906 ImplicationChecksByTransitivity, 2513.8ms TimeCoverageRelationStatistics Valid=1963, Invalid=11843, Unknown=0, NotChecked=0, Total=13806 [2021-08-21 12:48:13,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7324 states. [2021-08-21 12:48:13,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7324 to 2689. [2021-08-21 12:48:13,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2689 states, 2688 states have (on average 2.591517857142857) internal successors, (6966), 2688 states have internal predecessors, (6966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2689 states to 2689 states and 6966 transitions. [2021-08-21 12:48:13,887 INFO L78 Accepts]: Start accepts. Automaton has 2689 states and 6966 transitions. Word has length 37 [2021-08-21 12:48:13,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:13,887 INFO L470 AbstractCegarLoop]: Abstraction has 2689 states and 6966 transitions. [2021-08-21 12:48:13,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) 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) [2021-08-21 12:48:13,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2689 states and 6966 transitions. [2021-08-21 12:48:13,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:48:13,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:13,892 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:13,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:14,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:14,105 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:14,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:14,105 INFO L82 PathProgramCache]: Analyzing trace with hash 972953114, now seen corresponding path program 19 times [2021-08-21 12:48:14,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:14,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810600729] [2021-08-21 12:48:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:14,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:48:14,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:14,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810600729] [2021-08-21 12:48:14,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810600729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:14,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084443354] [2021-08-21 12:48:14,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:48:14,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:14,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:14,348 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:14,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 12:48:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:15,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:48:15,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:15,664 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 12:48:15,664 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 38 treesize of output 18 [2021-08-21 12:48:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:15,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084443354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:15,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:15,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-21 12:48:15,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189235627] [2021-08-21 12:48:15,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:48:15,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:15,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:48:15,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:48:15,742 INFO L87 Difference]: Start difference. First operand 2689 states and 6966 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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) [2021-08-21 12:48:18,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:18,340 INFO L93 Difference]: Finished difference Result 9057 states and 22992 transitions. [2021-08-21 12:48:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-21 12:48:18,340 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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 37 [2021-08-21 12:48:18,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:18,352 INFO L225 Difference]: With dead ends: 9057 [2021-08-21 12:48:18,352 INFO L226 Difference]: Without dead ends: 8788 [2021-08-21 12:48:18,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3401 ImplicationChecksByTransitivity, 2175.6ms TimeCoverageRelationStatistics Valid=1698, Invalid=9014, Unknown=0, NotChecked=0, Total=10712 [2021-08-21 12:48:18,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8788 states. [2021-08-21 12:48:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8788 to 3079. [2021-08-21 12:48:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3078 states have (on average 2.585769980506823) internal successors, (7959), 3078 states have internal predecessors, (7959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:18,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 7959 transitions. [2021-08-21 12:48:18,425 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 7959 transitions. Word has length 37 [2021-08-21 12:48:18,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:18,425 INFO L470 AbstractCegarLoop]: Abstraction has 3079 states and 7959 transitions. [2021-08-21 12:48:18,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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) [2021-08-21 12:48:18,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 7959 transitions. [2021-08-21 12:48:18,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:48:18,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:18,432 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:18,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:18,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:18,645 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:18,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1488829546, now seen corresponding path program 20 times [2021-08-21 12:48:18,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:18,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815454121] [2021-08-21 12:48:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:18,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:48:18,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:18,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815454121] [2021-08-21 12:48:18,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815454121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:18,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059645008] [2021-08-21 12:48:18,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:48:18,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:18,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:18,875 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:18,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 12:48:19,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:48:19,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:19,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:48:19,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:20,242 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 12:48:20,243 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 38 treesize of output 18 [2021-08-21 12:48:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:20,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059645008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:20,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:20,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-21 12:48:20,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885633587] [2021-08-21 12:48:20,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:48:20,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:20,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:48:20,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:48:20,333 INFO L87 Difference]: Start difference. First operand 3079 states and 7959 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2021-08-21 12:48:23,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:23,452 INFO L93 Difference]: Finished difference Result 9971 states and 25421 transitions. [2021-08-21 12:48:23,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-21 12:48:23,452 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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 37 [2021-08-21 12:48:23,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:23,466 INFO L225 Difference]: With dead ends: 9971 [2021-08-21 12:48:23,466 INFO L226 Difference]: Without dead ends: 9131 [2021-08-21 12:48:23,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4625 ImplicationChecksByTransitivity, 2658.3ms TimeCoverageRelationStatistics Valid=2363, Invalid=11209, Unknown=0, NotChecked=0, Total=13572 [2021-08-21 12:48:23,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9131 states. [2021-08-21 12:48:23,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9131 to 3353. [2021-08-21 12:48:23,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.5733890214797137) internal successors, (8626), 3352 states have internal predecessors, (8626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:23,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 8626 transitions. [2021-08-21 12:48:23,552 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 8626 transitions. Word has length 37 [2021-08-21 12:48:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:23,552 INFO L470 AbstractCegarLoop]: Abstraction has 3353 states and 8626 transitions. [2021-08-21 12:48:23,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2021-08-21 12:48:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 8626 transitions. [2021-08-21 12:48:23,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:48:23,558 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:23,558 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:23,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:23,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 12:48:23,773 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:23,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:23,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2066976134, now seen corresponding path program 21 times [2021-08-21 12:48:23,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:23,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555147707] [2021-08-21 12:48:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:23,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:48:23,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:23,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555147707] [2021-08-21 12:48:23,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555147707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:23,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335152633] [2021-08-21 12:48:23,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:48:23,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:23,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:23,993 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:23,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 12:48:24,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:48:24,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:24,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:48:24,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:25,370 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 12:48:25,370 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 38 treesize of output 18 [2021-08-21 12:48:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:25,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335152633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:25,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:25,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-08-21 12:48:25,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485953903] [2021-08-21 12:48:25,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:48:25,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:25,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:48:25,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:48:25,452 INFO L87 Difference]: Start difference. First operand 3353 states and 8626 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) 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) [2021-08-21 12:48:28,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:28,587 INFO L93 Difference]: Finished difference Result 10547 states and 26668 transitions. [2021-08-21 12:48:28,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-08-21 12:48:28,587 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) 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 37 [2021-08-21 12:48:28,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:28,601 INFO L225 Difference]: With dead ends: 10547 [2021-08-21 12:48:28,601 INFO L226 Difference]: Without dead ends: 9697 [2021-08-21 12:48:28,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5698 ImplicationChecksByTransitivity, 2647.7ms TimeCoverageRelationStatistics Valid=2354, Invalid=13146, Unknown=0, NotChecked=0, Total=15500 [2021-08-21 12:48:28,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9697 states. [2021-08-21 12:48:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9697 to 3453. [2021-08-21 12:48:28,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3452 states have (on average 2.5706836616454227) internal successors, (8874), 3452 states have internal predecessors, (8874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 8874 transitions. [2021-08-21 12:48:28,678 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 8874 transitions. Word has length 37 [2021-08-21 12:48:28,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:28,678 INFO L470 AbstractCegarLoop]: Abstraction has 3453 states and 8874 transitions. [2021-08-21 12:48:28,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) 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) [2021-08-21 12:48:28,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 8874 transitions. [2021-08-21 12:48:28,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:48:28,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:28,684 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:28,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:28,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 12:48:28,891 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:28,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:28,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1940938686, now seen corresponding path program 22 times [2021-08-21 12:48:28,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:28,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148557320] [2021-08-21 12:48:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:28,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:29,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:29,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148557320] [2021-08-21 12:48:29,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148557320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:29,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924522330] [2021-08-21 12:48:29,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:48:29,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:29,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:29,128 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:29,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 12:48:29,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:48:29,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:29,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:48:29,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:30,672 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 12:48:30,673 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 38 treesize of output 18 [2021-08-21 12:48:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:30,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924522330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:30,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:30,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-21 12:48:30,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9921850] [2021-08-21 12:48:30,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:48:30,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:30,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:48:30,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:48:30,754 INFO L87 Difference]: Start difference. First operand 3453 states and 8874 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2021-08-21 12:48:33,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:33,823 INFO L93 Difference]: Finished difference Result 10355 states and 26430 transitions. [2021-08-21 12:48:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-21 12:48:33,823 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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 37 [2021-08-21 12:48:33,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:33,838 INFO L225 Difference]: With dead ends: 10355 [2021-08-21 12:48:33,838 INFO L226 Difference]: Without dead ends: 9511 [2021-08-21 12:48:33,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4575 ImplicationChecksByTransitivity, 2583.4ms TimeCoverageRelationStatistics Valid=2137, Invalid=11669, Unknown=0, NotChecked=0, Total=13806 [2021-08-21 12:48:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9511 states. [2021-08-21 12:48:33,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9511 to 3745. [2021-08-21 12:48:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3745 states, 3744 states have (on average 2.564636752136752) internal successors, (9602), 3744 states have internal predecessors, (9602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3745 states to 3745 states and 9602 transitions. [2021-08-21 12:48:33,925 INFO L78 Accepts]: Start accepts. Automaton has 3745 states and 9602 transitions. Word has length 37 [2021-08-21 12:48:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:33,925 INFO L470 AbstractCegarLoop]: Abstraction has 3745 states and 9602 transitions. [2021-08-21 12:48:33,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2021-08-21 12:48:33,926 INFO L276 IsEmpty]: Start isEmpty. Operand 3745 states and 9602 transitions. [2021-08-21 12:48:33,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:48:33,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:33,931 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:33,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:34,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:34,145 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:34,145 INFO L82 PathProgramCache]: Analyzing trace with hash 949570788, now seen corresponding path program 23 times [2021-08-21 12:48:34,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:34,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342971907] [2021-08-21 12:48:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:34,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:34,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:34,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342971907] [2021-08-21 12:48:34,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342971907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:34,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777468356] [2021-08-21 12:48:34,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:48:34,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:34,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:34,379 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:34,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 12:48:35,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:48:35,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:35,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:48:35,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:35,930 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 12:48:35,930 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 38 treesize of output 18 [2021-08-21 12:48:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:36,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777468356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:36,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:36,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-21 12:48:36,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131329227] [2021-08-21 12:48:36,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:48:36,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:48:36,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:48:36,012 INFO L87 Difference]: Start difference. First operand 3745 states and 9602 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-21 12:48:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:39,052 INFO L93 Difference]: Finished difference Result 9293 states and 23709 transitions. [2021-08-21 12:48:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-21 12:48:39,053 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 37 [2021-08-21 12:48:39,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:39,064 INFO L225 Difference]: With dead ends: 9293 [2021-08-21 12:48:39,064 INFO L226 Difference]: Without dead ends: 8778 [2021-08-21 12:48:39,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4028 ImplicationChecksByTransitivity, 2633.6ms TimeCoverageRelationStatistics Valid=2197, Invalid=10235, Unknown=0, NotChecked=0, Total=12432 [2021-08-21 12:48:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8778 states. [2021-08-21 12:48:39,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8778 to 3859. [2021-08-21 12:48:39,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3859 states, 3858 states have (on average 2.548729911871436) internal successors, (9833), 3858 states have internal predecessors, (9833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3859 states to 3859 states and 9833 transitions. [2021-08-21 12:48:39,139 INFO L78 Accepts]: Start accepts. Automaton has 3859 states and 9833 transitions. Word has length 37 [2021-08-21 12:48:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:39,139 INFO L470 AbstractCegarLoop]: Abstraction has 3859 states and 9833 transitions. [2021-08-21 12:48:39,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-21 12:48:39,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3859 states and 9833 transitions. [2021-08-21 12:48:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:48:39,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:39,145 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:39,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:39,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:39,357 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:39,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:39,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1131314986, now seen corresponding path program 24 times [2021-08-21 12:48:39,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:39,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218460427] [2021-08-21 12:48:39,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:39,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:48:39,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:39,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218460427] [2021-08-21 12:48:39,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218460427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:39,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694628819] [2021-08-21 12:48:39,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:48:39,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:39,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:39,579 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:39,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 12:48:40,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:48:40,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:40,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 12:48:40,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:41,119 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 12:48:41,120 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 38 treesize of output 18 [2021-08-21 12:48:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:41,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694628819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:41,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:41,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-21 12:48:41,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377902563] [2021-08-21 12:48:41,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:48:41,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:41,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:48:41,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:48:41,206 INFO L87 Difference]: Start difference. First operand 3859 states and 9833 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) 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) [2021-08-21 12:48:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:44,772 INFO L93 Difference]: Finished difference Result 13283 states and 33516 transitions. [2021-08-21 12:48:44,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-08-21 12:48:44,773 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) 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 37 [2021-08-21 12:48:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:44,788 INFO L225 Difference]: With dead ends: 13283 [2021-08-21 12:48:44,788 INFO L226 Difference]: Without dead ends: 12661 [2021-08-21 12:48:44,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5620 ImplicationChecksByTransitivity, 2905.7ms TimeCoverageRelationStatistics Valid=2290, Invalid=13460, Unknown=0, NotChecked=0, Total=15750 [2021-08-21 12:48:44,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12661 states. [2021-08-21 12:48:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12661 to 3993. [2021-08-21 12:48:44,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3993 states, 3992 states have (on average 2.5445891783567136) internal successors, (10158), 3992 states have internal predecessors, (10158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3993 states to 3993 states and 10158 transitions. [2021-08-21 12:48:44,870 INFO L78 Accepts]: Start accepts. Automaton has 3993 states and 10158 transitions. Word has length 37 [2021-08-21 12:48:44,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:44,870 INFO L470 AbstractCegarLoop]: Abstraction has 3993 states and 10158 transitions. [2021-08-21 12:48:44,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) 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) [2021-08-21 12:48:44,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3993 states and 10158 transitions. [2021-08-21 12:48:44,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:48:44,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:44,876 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:44,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:45,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 12:48:45,093 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:45,093 INFO L82 PathProgramCache]: Analyzing trace with hash -346656042, now seen corresponding path program 25 times [2021-08-21 12:48:45,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:45,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972179566] [2021-08-21 12:48:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:45,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:48:45,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:45,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972179566] [2021-08-21 12:48:45,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972179566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:45,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107761918] [2021-08-21 12:48:45,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:48:45,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:45,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:45,321 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:45,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 12:48:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:46,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:48:46,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:46,910 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 12:48:46,910 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 38 treesize of output 18 [2021-08-21 12:48:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:46,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107761918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:46,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:46,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-21 12:48:46,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97664524] [2021-08-21 12:48:46,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:48:46,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:46,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:48:46,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:48:46,985 INFO L87 Difference]: Start difference. First operand 3993 states and 10158 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:51,365 INFO L93 Difference]: Finished difference Result 12454 states and 31250 transitions. [2021-08-21 12:48:51,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-08-21 12:48:51,366 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:48:51,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:51,383 INFO L225 Difference]: With dead ends: 12454 [2021-08-21 12:48:51,383 INFO L226 Difference]: Without dead ends: 11813 [2021-08-21 12:48:51,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7884 ImplicationChecksByTransitivity, 3639.5ms TimeCoverageRelationStatistics Valid=3139, Invalid=17741, Unknown=0, NotChecked=0, Total=20880 [2021-08-21 12:48:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11813 states. [2021-08-21 12:48:51,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11813 to 4267. [2021-08-21 12:48:51,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4267 states, 4266 states have (on average 2.5389123300515704) internal successors, (10831), 4266 states have internal predecessors, (10831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4267 states to 4267 states and 10831 transitions. [2021-08-21 12:48:51,499 INFO L78 Accepts]: Start accepts. Automaton has 4267 states and 10831 transitions. Word has length 37 [2021-08-21 12:48:51,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:51,499 INFO L470 AbstractCegarLoop]: Abstraction has 4267 states and 10831 transitions. [2021-08-21 12:48:51,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,499 INFO L276 IsEmpty]: Start isEmpty. Operand 4267 states and 10831 transitions. [2021-08-21 12:48:51,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 12:48:51,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:51,506 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:51,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:51,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 12:48:51,713 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:51,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:51,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2073145783, now seen corresponding path program 26 times [2021-08-21 12:48:51,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:51,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720696286] [2021-08-21 12:48:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:51,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:51,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:51,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720696286] [2021-08-21 12:48:51,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720696286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:51,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189291104] [2021-08-21 12:48:51,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:48:51,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:51,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:51,749 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:51,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 12:48:52,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:48:52,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:52,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:48:52,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:52,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189291104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:52,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:52,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 12:48:52,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823660292] [2021-08-21 12:48:52,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:48:52,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:52,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:48:52,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:48:52,900 INFO L87 Difference]: Start difference. First operand 4267 states and 10831 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 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) [2021-08-21 12:48:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:52,926 INFO L93 Difference]: Finished difference Result 5027 states and 12630 transitions. [2021-08-21 12:48:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:48:52,926 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 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 40 [2021-08-21 12:48:52,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:52,934 INFO L225 Difference]: With dead ends: 5027 [2021-08-21 12:48:52,934 INFO L226 Difference]: Without dead ends: 4955 [2021-08-21 12:48:52,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:48:52,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4955 states. [2021-08-21 12:48:52,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4955 to 4425. [2021-08-21 12:48:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4425 states, 4424 states have (on average 2.5397830018083183) internal successors, (11236), 4424 states have internal predecessors, (11236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:52,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4425 states to 4425 states and 11236 transitions. [2021-08-21 12:48:52,998 INFO L78 Accepts]: Start accepts. Automaton has 4425 states and 11236 transitions. Word has length 40 [2021-08-21 12:48:52,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:52,998 INFO L470 AbstractCegarLoop]: Abstraction has 4425 states and 11236 transitions. [2021-08-21 12:48:52,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 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) [2021-08-21 12:48:52,999 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states and 11236 transitions. [2021-08-21 12:48:53,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:48:53,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:53,007 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:53,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:53,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 12:48:53,209 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:48:53,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:53,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1650713771, now seen corresponding path program 27 times [2021-08-21 12:48:53,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:53,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784255252] [2021-08-21 12:48:53,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:53,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:53,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:53,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784255252] [2021-08-21 12:48:53,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784255252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:53,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015613714] [2021-08-21 12:48:53,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:48:53,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:53,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:53,599 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:48:53,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 12:48:54,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:48:54,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:54,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:48:54,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:55,615 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:48:55,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:48:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:55,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015613714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:55,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:55,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-21 12:48:55,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44913765] [2021-08-21 12:48:55,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:48:55,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:55,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:48:55,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:48:55,707 INFO L87 Difference]: Start difference. First operand 4425 states and 11236 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:01,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:01,614 INFO L93 Difference]: Finished difference Result 11758 states and 29562 transitions. [2021-08-21 12:49:01,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-08-21 12:49:01,615 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:49:01,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:01,629 INFO L225 Difference]: With dead ends: 11758 [2021-08-21 12:49:01,629 INFO L226 Difference]: Without dead ends: 10607 [2021-08-21 12:49:01,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8742 ImplicationChecksByTransitivity, 4632.1ms TimeCoverageRelationStatistics Valid=3516, Invalid=21924, Unknown=0, NotChecked=0, Total=25440 [2021-08-21 12:49:01,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10607 states. [2021-08-21 12:49:01,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10607 to 4790. [2021-08-21 12:49:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4790 states, 4789 states have (on average 2.546043015243266) internal successors, (12193), 4789 states have internal predecessors, (12193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:01,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4790 states to 4790 states and 12193 transitions. [2021-08-21 12:49:01,714 INFO L78 Accepts]: Start accepts. Automaton has 4790 states and 12193 transitions. Word has length 43 [2021-08-21 12:49:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:01,714 INFO L470 AbstractCegarLoop]: Abstraction has 4790 states and 12193 transitions. [2021-08-21 12:49:01,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:01,715 INFO L276 IsEmpty]: Start isEmpty. Operand 4790 states and 12193 transitions. [2021-08-21 12:49:01,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:49:01,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:01,721 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:01,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:01,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:01,932 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:01,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:01,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1112247061, now seen corresponding path program 28 times [2021-08-21 12:49:01,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:01,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124476627] [2021-08-21 12:49:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:01,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:02,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:02,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124476627] [2021-08-21 12:49:02,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124476627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:02,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605327062] [2021-08-21 12:49:02,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:49:02,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:02,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:02,325 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:02,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 12:49:03,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:49:03,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:03,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:49:03,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:04,381 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:49:04,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:49:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:04,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605327062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:04,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:04,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-21 12:49:04,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922062063] [2021-08-21 12:49:04,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:49:04,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:04,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:49:04,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:49:04,472 INFO L87 Difference]: Start difference. First operand 4790 states and 12193 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:13,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:13,577 INFO L93 Difference]: Finished difference Result 14386 states and 36148 transitions. [2021-08-21 12:49:13,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-08-21 12:49:13,578 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:49:13,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:13,597 INFO L225 Difference]: With dead ends: 14386 [2021-08-21 12:49:13,597 INFO L226 Difference]: Without dead ends: 13280 [2021-08-21 12:49:13,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15990 ImplicationChecksByTransitivity, 7359.6ms TimeCoverageRelationStatistics Valid=6081, Invalid=37391, Unknown=0, NotChecked=0, Total=43472 [2021-08-21 12:49:13,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13280 states. [2021-08-21 12:49:13,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13280 to 4892. [2021-08-21 12:49:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4892 states, 4891 states have (on average 2.5487630341443466) internal successors, (12466), 4891 states have internal predecessors, (12466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:13,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4892 states to 4892 states and 12466 transitions. [2021-08-21 12:49:13,700 INFO L78 Accepts]: Start accepts. Automaton has 4892 states and 12466 transitions. Word has length 43 [2021-08-21 12:49:13,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:13,701 INFO L470 AbstractCegarLoop]: Abstraction has 4892 states and 12466 transitions. [2021-08-21 12:49:13,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:13,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4892 states and 12466 transitions. [2021-08-21 12:49:13,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:49:13,708 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:13,708 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:13,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-21 12:49:13,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:13,912 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:13,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:13,912 INFO L82 PathProgramCache]: Analyzing trace with hash -2103614959, now seen corresponding path program 29 times [2021-08-21 12:49:13,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:13,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460828362] [2021-08-21 12:49:13,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:13,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:14,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:14,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460828362] [2021-08-21 12:49:14,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460828362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:14,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202895758] [2021-08-21 12:49:14,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:49:14,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:14,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:14,290 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:14,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 12:49:15,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:49:15,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:15,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:49:15,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:16,489 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:49:16,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:49:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:16,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202895758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:16,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:16,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-21 12:49:16,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053595323] [2021-08-21 12:49:16,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:49:16,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:16,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:49:16,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:49:16,589 INFO L87 Difference]: Start difference. First operand 4892 states and 12466 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:24,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:24,371 INFO L93 Difference]: Finished difference Result 13946 states and 35192 transitions. [2021-08-21 12:49:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-08-21 12:49:24,371 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:49:24,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:24,388 INFO L225 Difference]: With dead ends: 13946 [2021-08-21 12:49:24,388 INFO L226 Difference]: Without dead ends: 13058 [2021-08-21 12:49:24,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11848 ImplicationChecksByTransitivity, 6500.7ms TimeCoverageRelationStatistics Valid=4485, Invalid=30297, Unknown=0, NotChecked=0, Total=34782 [2021-08-21 12:49:24,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13058 states. [2021-08-21 12:49:24,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13058 to 4962. [2021-08-21 12:49:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4962 states, 4961 states have (on average 2.5504938520459586) internal successors, (12653), 4961 states have internal predecessors, (12653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4962 states to 4962 states and 12653 transitions. [2021-08-21 12:49:24,478 INFO L78 Accepts]: Start accepts. Automaton has 4962 states and 12653 transitions. Word has length 43 [2021-08-21 12:49:24,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:24,478 INFO L470 AbstractCegarLoop]: Abstraction has 4962 states and 12653 transitions. [2021-08-21 12:49:24,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:24,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4962 states and 12653 transitions. [2021-08-21 12:49:24,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:49:24,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:24,484 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:24,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:24,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:24,685 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:24,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:24,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1987652953, now seen corresponding path program 30 times [2021-08-21 12:49:24,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:24,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047174155] [2021-08-21 12:49:24,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:24,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:25,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:25,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047174155] [2021-08-21 12:49:25,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047174155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:25,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434413235] [2021-08-21 12:49:25,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:49:25,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:25,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:25,115 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:25,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 12:49:26,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:49:26,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:26,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:49:26,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:27,560 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-08-21 12:49:27,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 40 [2021-08-21 12:49:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:27,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434413235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:27,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:27,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-21 12:49:27,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635761565] [2021-08-21 12:49:27,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:49:27,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:27,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:49:27,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1403, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:49:27,662 INFO L87 Difference]: Start difference. First operand 4962 states and 12653 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:34,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:34,058 INFO L93 Difference]: Finished difference Result 13023 states and 32964 transitions. [2021-08-21 12:49:34,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-08-21 12:49:34,059 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:49:34,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:34,077 INFO L225 Difference]: With dead ends: 13023 [2021-08-21 12:49:34,077 INFO L226 Difference]: Without dead ends: 12679 [2021-08-21 12:49:34,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9242 ImplicationChecksByTransitivity, 5413.2ms TimeCoverageRelationStatistics Valid=3277, Invalid=24779, Unknown=0, NotChecked=0, Total=28056 [2021-08-21 12:49:34,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12679 states. [2021-08-21 12:49:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12679 to 5124. [2021-08-21 12:49:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5124 states, 5123 states have (on average 2.556705055631466) internal successors, (13098), 5123 states have internal predecessors, (13098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:34,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 13098 transitions. [2021-08-21 12:49:34,176 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 13098 transitions. Word has length 43 [2021-08-21 12:49:34,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:34,176 INFO L470 AbstractCegarLoop]: Abstraction has 5124 states and 13098 transitions. [2021-08-21 12:49:34,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:34,177 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 13098 transitions. [2021-08-21 12:49:34,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:49:34,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:34,182 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:34,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-21 12:49:34,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 12:49:34,383 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:34,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1298369877, now seen corresponding path program 31 times [2021-08-21 12:49:34,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:34,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195252363] [2021-08-21 12:49:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:34,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:34,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:34,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195252363] [2021-08-21 12:49:34,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195252363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:34,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117437838] [2021-08-21 12:49:34,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:49:34,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:34,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:34,803 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:34,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 12:49:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:36,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:49:36,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:37,117 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:49:37,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:49:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:37,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117437838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:37,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:37,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-21 12:49:37,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179442911] [2021-08-21 12:49:37,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:49:37,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:37,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:49:37,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:49:37,206 INFO L87 Difference]: Start difference. First operand 5124 states and 13098 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:47,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:47,974 INFO L93 Difference]: Finished difference Result 18454 states and 46345 transitions. [2021-08-21 12:49:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2021-08-21 12:49:47,975 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:49:47,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:47,999 INFO L225 Difference]: With dead ends: 18454 [2021-08-21 12:49:47,999 INFO L226 Difference]: Without dead ends: 16100 [2021-08-21 12:49:48,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24578 ImplicationChecksByTransitivity, 9032.7ms TimeCoverageRelationStatistics Valid=8601, Invalid=52161, Unknown=0, NotChecked=0, Total=60762 [2021-08-21 12:49:48,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16100 states. [2021-08-21 12:49:48,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16100 to 5232. [2021-08-21 12:49:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5232 states, 5231 states have (on average 2.5597400114700823) internal successors, (13390), 5231 states have internal predecessors, (13390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5232 states to 5232 states and 13390 transitions. [2021-08-21 12:49:48,121 INFO L78 Accepts]: Start accepts. Automaton has 5232 states and 13390 transitions. Word has length 43 [2021-08-21 12:49:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:48,121 INFO L470 AbstractCegarLoop]: Abstraction has 5232 states and 13390 transitions. [2021-08-21 12:49:48,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:48,121 INFO L276 IsEmpty]: Start isEmpty. Operand 5232 states and 13390 transitions. [2021-08-21 12:49:48,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:49:48,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:48,127 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:48,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:48,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:48,327 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:49:48,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:48,328 INFO L82 PathProgramCache]: Analyzing trace with hash -347552145, now seen corresponding path program 32 times [2021-08-21 12:49:48,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:48,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807908231] [2021-08-21 12:49:48,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:48,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:48,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:48,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807908231] [2021-08-21 12:49:48,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807908231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:48,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790481731] [2021-08-21 12:49:48,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:49:48,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:48,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:48,740 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:49:48,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 12:49:50,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:49:50,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:50,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:49:50,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:51,294 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-08-21 12:49:51,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 40 [2021-08-21 12:49:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:51,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790481731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:51,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:51,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-21 12:49:51,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687997051] [2021-08-21 12:49:51,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:49:51,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:51,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:49:51,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:49:51,390 INFO L87 Difference]: Start difference. First operand 5232 states and 13390 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:59,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:59,797 INFO L93 Difference]: Finished difference Result 15771 states and 39934 transitions. [2021-08-21 12:49:59,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-08-21 12:49:59,798 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:49:59,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:59,819 INFO L225 Difference]: With dead ends: 15771 [2021-08-21 12:49:59,819 INFO L226 Difference]: Without dead ends: 14575 [2021-08-21 12:49:59,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15536 ImplicationChecksByTransitivity, 6642.2ms TimeCoverageRelationStatistics Valid=5522, Invalid=35484, Unknown=0, NotChecked=0, Total=41006 [2021-08-21 12:49:59,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14575 states. [2021-08-21 12:49:59,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14575 to 5510. [2021-08-21 12:49:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5510 states, 5509 states have (on average 2.565075331276094) internal successors, (14131), 5509 states have internal predecessors, (14131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:59,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5510 states to 5510 states and 14131 transitions. [2021-08-21 12:49:59,933 INFO L78 Accepts]: Start accepts. Automaton has 5510 states and 14131 transitions. Word has length 43 [2021-08-21 12:49:59,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:59,933 INFO L470 AbstractCegarLoop]: Abstraction has 5510 states and 14131 transitions. [2021-08-21 12:49:59,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 5510 states and 14131 transitions. [2021-08-21 12:49:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:49:59,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:59,939 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:59,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:00,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:00,141 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:00,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:00,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1222958037, now seen corresponding path program 33 times [2021-08-21 12:50:00,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:00,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845065400] [2021-08-21 12:50:00,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:00,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:00,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:00,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845065400] [2021-08-21 12:50:00,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845065400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:00,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764210623] [2021-08-21 12:50:00,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:50:00,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:00,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:00,561 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:50:00,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 12:50:02,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:50:02,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:02,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:50:02,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:02,994 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:50:02,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:50:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:03,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764210623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:03,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:03,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-21 12:50:03,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136812118] [2021-08-21 12:50:03,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:50:03,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:03,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:50:03,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:50:03,084 INFO L87 Difference]: Start difference. First operand 5510 states and 14131 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:10,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:10,130 INFO L93 Difference]: Finished difference Result 14412 states and 36628 transitions. [2021-08-21 12:50:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-08-21 12:50:10,130 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:50:10,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:10,152 INFO L225 Difference]: With dead ends: 14412 [2021-08-21 12:50:10,152 INFO L226 Difference]: Without dead ends: 13902 [2021-08-21 12:50:10,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11727 ImplicationChecksByTransitivity, 5684.4ms TimeCoverageRelationStatistics Valid=3852, Invalid=29090, Unknown=0, NotChecked=0, Total=32942 [2021-08-21 12:50:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13902 states. [2021-08-21 12:50:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13902 to 5670. [2021-08-21 12:50:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5670 states, 5669 states have (on average 2.568177809137414) internal successors, (14559), 5669 states have internal predecessors, (14559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5670 states to 5670 states and 14559 transitions. [2021-08-21 12:50:10,274 INFO L78 Accepts]: Start accepts. Automaton has 5670 states and 14559 transitions. Word has length 43 [2021-08-21 12:50:10,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:10,274 INFO L470 AbstractCegarLoop]: Abstraction has 5670 states and 14559 transitions. [2021-08-21 12:50:10,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:10,274 INFO L276 IsEmpty]: Start isEmpty. Operand 5670 states and 14559 transitions. [2021-08-21 12:50:10,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:50:10,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:10,281 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:10,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:10,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 12:50:10,481 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:10,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:10,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1399662073, now seen corresponding path program 34 times [2021-08-21 12:50:10,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:10,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601491588] [2021-08-21 12:50:10,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:10,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:10,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:10,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601491588] [2021-08-21 12:50:10,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601491588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:10,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107950286] [2021-08-21 12:50:10,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:50:10,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:10,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:10,825 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:50:10,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 12:50:12,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:50:12,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:12,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:50:12,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:13,314 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:50:13,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:50:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:13,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107950286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:13,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:13,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-08-21 12:50:13,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982275284] [2021-08-21 12:50:13,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:50:13,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:13,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:50:13,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:50:13,404 INFO L87 Difference]: Start difference. First operand 5670 states and 14559 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:24,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:24,681 INFO L93 Difference]: Finished difference Result 20328 states and 51431 transitions. [2021-08-21 12:50:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2021-08-21 12:50:24,681 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:50:24,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:24,711 INFO L225 Difference]: With dead ends: 20328 [2021-08-21 12:50:24,711 INFO L226 Difference]: Without dead ends: 18327 [2021-08-21 12:50:24,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24513 ImplicationChecksByTransitivity, 8741.9ms TimeCoverageRelationStatistics Valid=8028, Invalid=52242, Unknown=0, NotChecked=0, Total=60270 [2021-08-21 12:50:24,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18327 states. [2021-08-21 12:50:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18327 to 6502. [2021-08-21 12:50:24,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6502 states, 6501 states have (on average 2.569604676203661) internal successors, (16705), 6501 states have internal predecessors, (16705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6502 states to 6502 states and 16705 transitions. [2021-08-21 12:50:24,854 INFO L78 Accepts]: Start accepts. Automaton has 6502 states and 16705 transitions. Word has length 43 [2021-08-21 12:50:24,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:24,854 INFO L470 AbstractCegarLoop]: Abstraction has 6502 states and 16705 transitions. [2021-08-21 12:50:24,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 6502 states and 16705 transitions. [2021-08-21 12:50:24,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:50:24,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:24,862 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:24,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:25,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 12:50:25,062 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:25,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:25,063 INFO L82 PathProgramCache]: Analyzing trace with hash 408294175, now seen corresponding path program 35 times [2021-08-21 12:50:25,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:25,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459195282] [2021-08-21 12:50:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:25,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:25,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:25,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459195282] [2021-08-21 12:50:25,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459195282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:25,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006195813] [2021-08-21 12:50:25,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:50:25,480 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:25,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:25,481 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:50:25,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 12:50:27,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:50:27,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:27,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:50:27,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:28,499 INFO L354 Elim1Store]: treesize reduction 207, result has 4.6 percent of original size [2021-08-21 12:50:28,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 46 [2021-08-21 12:50:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:28,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006195813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:28,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:28,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-08-21 12:50:28,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782466051] [2021-08-21 12:50:28,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:50:28,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:28,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:50:28,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:50:28,598 INFO L87 Difference]: Start difference. First operand 6502 states and 16705 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:38,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:38,158 INFO L93 Difference]: Finished difference Result 19624 states and 49953 transitions. [2021-08-21 12:50:38,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-08-21 12:50:38,159 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:50:38,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:38,183 INFO L225 Difference]: With dead ends: 19624 [2021-08-21 12:50:38,184 INFO L226 Difference]: Without dead ends: 18679 [2021-08-21 12:50:38,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16269 ImplicationChecksByTransitivity, 7251.1ms TimeCoverageRelationStatistics Valid=5282, Invalid=37360, Unknown=0, NotChecked=0, Total=42642 [2021-08-21 12:50:38,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18679 states. [2021-08-21 12:50:38,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18679 to 8112. [2021-08-21 12:50:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8112 states, 8111 states have (on average 2.5693502650721243) internal successors, (20840), 8111 states have internal predecessors, (20840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8112 states to 8112 states and 20840 transitions. [2021-08-21 12:50:38,339 INFO L78 Accepts]: Start accepts. Automaton has 8112 states and 20840 transitions. Word has length 43 [2021-08-21 12:50:38,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:38,339 INFO L470 AbstractCegarLoop]: Abstraction has 8112 states and 20840 transitions. [2021-08-21 12:50:38,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 8112 states and 20840 transitions. [2021-08-21 12:50:38,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:50:38,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:38,350 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:38,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:38,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 12:50:38,551 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:38,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:38,551 INFO L82 PathProgramCache]: Analyzing trace with hash 524256181, now seen corresponding path program 36 times [2021-08-21 12:50:38,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:38,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329841739] [2021-08-21 12:50:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:38,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:38,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:38,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329841739] [2021-08-21 12:50:38,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329841739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:38,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714850973] [2021-08-21 12:50:38,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:50:38,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:38,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:38,968 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:50:38,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 12:50:40,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:50:40,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:40,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:50:40,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:41,785 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-08-21 12:50:41,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 40 [2021-08-21 12:50:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:41,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714850973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:41,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:41,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-08-21 12:50:41,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234389408] [2021-08-21 12:50:41,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:50:41,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:41,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:50:41,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:50:41,885 INFO L87 Difference]: Start difference. First operand 8112 states and 20840 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:48,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:48,651 INFO L93 Difference]: Finished difference Result 17690 states and 45088 transitions. [2021-08-21 12:50:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-08-21 12:50:48,652 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:50:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:48,679 INFO L225 Difference]: With dead ends: 17690 [2021-08-21 12:50:48,679 INFO L226 Difference]: Without dead ends: 17516 [2021-08-21 12:50:48,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11997 ImplicationChecksByTransitivity, 5466.0ms TimeCoverageRelationStatistics Valid=3780, Invalid=29162, Unknown=0, NotChecked=0, Total=32942 [2021-08-21 12:50:48,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17516 states. [2021-08-21 12:50:48,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17516 to 8942. [2021-08-21 12:50:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8942 states, 8941 states have (on average 2.5700704619170116) internal successors, (22979), 8941 states have internal predecessors, (22979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:48,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8942 states to 8942 states and 22979 transitions. [2021-08-21 12:50:48,846 INFO L78 Accepts]: Start accepts. Automaton has 8942 states and 22979 transitions. Word has length 43 [2021-08-21 12:50:48,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:48,846 INFO L470 AbstractCegarLoop]: Abstraction has 8942 states and 22979 transitions. [2021-08-21 12:50:48,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:48,846 INFO L276 IsEmpty]: Start isEmpty. Operand 8942 states and 22979 transitions. [2021-08-21 12:50:48,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:50:48,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:48,857 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:48,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:49,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 12:50:49,063 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:50:49,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:49,063 INFO L82 PathProgramCache]: Analyzing trace with hash -138281515, now seen corresponding path program 37 times [2021-08-21 12:50:49,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:49,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080687642] [2021-08-21 12:50:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:49,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:50:49,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:49,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080687642] [2021-08-21 12:50:49,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080687642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:49,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601597367] [2021-08-21 12:50:49,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:50:49,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:49,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:49,419 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:50:49,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 12:50:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:51,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:50:51,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:52,086 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:50:52,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:50:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:52,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601597367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:52,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:52,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-21 12:50:52,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736820931] [2021-08-21 12:50:52,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:50:52,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:52,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:50:52,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:50:52,175 INFO L87 Difference]: Start difference. First operand 8942 states and 22979 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:01,240 INFO L93 Difference]: Finished difference Result 22623 states and 57757 transitions. [2021-08-21 12:51:01,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2021-08-21 12:51:01,240 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:51:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:01,278 INFO L225 Difference]: With dead ends: 22623 [2021-08-21 12:51:01,278 INFO L226 Difference]: Without dead ends: 21587 [2021-08-21 12:51:01,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18575 ImplicationChecksByTransitivity, 7126.0ms TimeCoverageRelationStatistics Valid=6094, Invalid=41212, Unknown=0, NotChecked=0, Total=47306 [2021-08-21 12:51:01,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21587 states. [2021-08-21 12:51:01,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21587 to 10142. [2021-08-21 12:51:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10142 states, 10141 states have (on average 2.5769647963711666) internal successors, (26133), 10141 states have internal predecessors, (26133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10142 states to 10142 states and 26133 transitions. [2021-08-21 12:51:01,501 INFO L78 Accepts]: Start accepts. Automaton has 10142 states and 26133 transitions. Word has length 43 [2021-08-21 12:51:01,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:01,502 INFO L470 AbstractCegarLoop]: Abstraction has 10142 states and 26133 transitions. [2021-08-21 12:51:01,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 10142 states and 26133 transitions. [2021-08-21 12:51:01,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:51:01,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:01,514 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:01,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:01,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 12:51:01,721 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:01,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:01,721 INFO L82 PathProgramCache]: Analyzing trace with hash 646377429, now seen corresponding path program 38 times [2021-08-21 12:51:01,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:01,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451153265] [2021-08-21 12:51:01,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:01,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:02,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:02,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451153265] [2021-08-21 12:51:02,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451153265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:02,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546971408] [2021-08-21 12:51:02,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:51:02,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:02,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:02,047 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:02,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 12:51:03,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:51:03,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:03,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:51:03,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:04,845 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:51:04,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:51:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:04,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546971408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:04,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:04,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-21 12:51:04,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238766005] [2021-08-21 12:51:04,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:51:04,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:04,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:51:04,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:51:04,929 INFO L87 Difference]: Start difference. First operand 10142 states and 26133 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:13,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:13,591 INFO L93 Difference]: Finished difference Result 25073 states and 64060 transitions. [2021-08-21 12:51:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2021-08-21 12:51:13,591 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:51:13,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:13,630 INFO L225 Difference]: With dead ends: 25073 [2021-08-21 12:51:13,630 INFO L226 Difference]: Without dead ends: 23317 [2021-08-21 12:51:13,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19182 ImplicationChecksByTransitivity, 6567.2ms TimeCoverageRelationStatistics Valid=5545, Invalid=41761, Unknown=0, NotChecked=0, Total=47306 [2021-08-21 12:51:13,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23317 states. [2021-08-21 12:51:13,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23317 to 12174. [2021-08-21 12:51:13,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12174 states, 12173 states have (on average 2.5913086338618254) internal successors, (31544), 12173 states have internal predecessors, (31544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12174 states to 12174 states and 31544 transitions. [2021-08-21 12:51:13,898 INFO L78 Accepts]: Start accepts. Automaton has 12174 states and 31544 transitions. Word has length 43 [2021-08-21 12:51:13,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:13,898 INFO L470 AbstractCegarLoop]: Abstraction has 12174 states and 31544 transitions. [2021-08-21 12:51:13,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 12174 states and 31544 transitions. [2021-08-21 12:51:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:51:13,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:13,912 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:13,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:14,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-21 12:51:14,113 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:14,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:14,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1083737465, now seen corresponding path program 39 times [2021-08-21 12:51:14,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:14,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144975501] [2021-08-21 12:51:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:14,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:51:14,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:14,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144975501] [2021-08-21 12:51:14,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144975501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:14,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410255495] [2021-08-21 12:51:14,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:51:14,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:14,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:14,433 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:14,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 12:51:16,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:51:16,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:16,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:51:16,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:17,316 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:51:17,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:51:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:17,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410255495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:17,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:17,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-21 12:51:17,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051012576] [2021-08-21 12:51:17,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:51:17,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:17,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:51:17,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:51:17,397 INFO L87 Difference]: Start difference. First operand 12174 states and 31544 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:24,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:24,673 INFO L93 Difference]: Finished difference Result 23172 states and 59593 transitions. [2021-08-21 12:51:24,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2021-08-21 12:51:24,674 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:51:24,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:24,708 INFO L225 Difference]: With dead ends: 23172 [2021-08-21 12:51:24,708 INFO L226 Difference]: Without dead ends: 22072 [2021-08-21 12:51:24,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13996 ImplicationChecksByTransitivity, 5334.5ms TimeCoverageRelationStatistics Valid=3941, Invalid=31591, Unknown=0, NotChecked=0, Total=35532 [2021-08-21 12:51:24,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22072 states. [2021-08-21 12:51:24,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22072 to 13498. [2021-08-21 12:51:24,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13498 states, 13497 states have (on average 2.6029488034378008) internal successors, (35132), 13497 states have internal predecessors, (35132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13498 states to 13498 states and 35132 transitions. [2021-08-21 12:51:24,977 INFO L78 Accepts]: Start accepts. Automaton has 13498 states and 35132 transitions. Word has length 43 [2021-08-21 12:51:24,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:24,977 INFO L470 AbstractCegarLoop]: Abstraction has 13498 states and 35132 transitions. [2021-08-21 12:51:24,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:24,977 INFO L276 IsEmpty]: Start isEmpty. Operand 13498 states and 35132 transitions. [2021-08-21 12:51:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:51:24,995 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:24,995 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:25,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:25,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 12:51:25,196 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:25,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:25,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1854286665, now seen corresponding path program 40 times [2021-08-21 12:51:25,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:25,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129305339] [2021-08-21 12:51:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:25,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:25,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:25,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129305339] [2021-08-21 12:51:25,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129305339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:25,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996296361] [2021-08-21 12:51:25,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:51:25,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:25,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:25,613 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:25,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 12:51:27,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:51:27,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:27,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:51:27,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:28,543 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:51:28,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:51:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:28,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996296361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:28,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:28,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-08-21 12:51:28,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774441852] [2021-08-21 12:51:28,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:51:28,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:28,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:51:28,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:51:28,631 INFO L87 Difference]: Start difference. First operand 13498 states and 35132 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:36,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:36,311 INFO L93 Difference]: Finished difference Result 34025 states and 88202 transitions. [2021-08-21 12:51:36,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-08-21 12:51:36,311 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:51:36,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:36,370 INFO L225 Difference]: With dead ends: 34025 [2021-08-21 12:51:36,370 INFO L226 Difference]: Without dead ends: 33172 [2021-08-21 12:51:36,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13278 ImplicationChecksByTransitivity, 5996.9ms TimeCoverageRelationStatistics Valid=4644, Invalid=31266, Unknown=0, NotChecked=0, Total=35910 [2021-08-21 12:51:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33172 states. [2021-08-21 12:51:36,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33172 to 14566. [2021-08-21 12:51:36,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14566 states, 14565 states have (on average 2.6025403364229316) internal successors, (37906), 14565 states have internal predecessors, (37906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14566 states to 14566 states and 37906 transitions. [2021-08-21 12:51:36,717 INFO L78 Accepts]: Start accepts. Automaton has 14566 states and 37906 transitions. Word has length 43 [2021-08-21 12:51:36,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:36,718 INFO L470 AbstractCegarLoop]: Abstraction has 14566 states and 37906 transitions. [2021-08-21 12:51:36,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 14566 states and 37906 transitions. [2021-08-21 12:51:36,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:51:36,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:36,736 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:36,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 12:51:36,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-21 12:51:36,937 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:36,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:36,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1970248671, now seen corresponding path program 41 times [2021-08-21 12:51:36,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:36,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844799516] [2021-08-21 12:51:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:36,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:37,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:37,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844799516] [2021-08-21 12:51:37,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844799516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:37,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189606288] [2021-08-21 12:51:37,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:51:37,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:37,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:37,333 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:37,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 12:51:39,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:51:39,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:39,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:51:39,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:40,380 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:51:40,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:51:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:40,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189606288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:40,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:40,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-08-21 12:51:40,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153390686] [2021-08-21 12:51:40,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:51:40,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:40,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:51:40,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:51:40,466 INFO L87 Difference]: Start difference. First operand 14566 states and 37906 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:46,780 INFO L93 Difference]: Finished difference Result 32054 states and 83187 transitions. [2021-08-21 12:51:46,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-08-21 12:51:46,780 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:51:46,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:46,846 INFO L225 Difference]: With dead ends: 32054 [2021-08-21 12:51:46,846 INFO L226 Difference]: Without dead ends: 31588 [2021-08-21 12:51:46,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11497 ImplicationChecksByTransitivity, 5075.6ms TimeCoverageRelationStatistics Valid=3867, Invalid=26583, Unknown=0, NotChecked=0, Total=30450 [2021-08-21 12:51:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31588 states. [2021-08-21 12:51:47,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31588 to 14730. [2021-08-21 12:51:47,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14730 states, 14729 states have (on average 2.606219023694752) internal successors, (38387), 14729 states have internal predecessors, (38387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:47,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14730 states to 14730 states and 38387 transitions. [2021-08-21 12:51:47,224 INFO L78 Accepts]: Start accepts. Automaton has 14730 states and 38387 transitions. Word has length 43 [2021-08-21 12:51:47,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:47,224 INFO L470 AbstractCegarLoop]: Abstraction has 14730 states and 38387 transitions. [2021-08-21 12:51:47,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:47,225 INFO L276 IsEmpty]: Start isEmpty. Operand 14730 states and 38387 transitions. [2021-08-21 12:51:47,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:51:47,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:47,244 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:47,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:47,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:47,444 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:47,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:47,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2092369919, now seen corresponding path program 42 times [2021-08-21 12:51:47,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:47,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322241816] [2021-08-21 12:51:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:47,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:47,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:47,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322241816] [2021-08-21 12:51:47,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322241816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:47,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896027378] [2021-08-21 12:51:47,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:51:47,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:47,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:47,794 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:47,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 12:51:49,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:51:49,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:49,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:51:49,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:50,895 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:51:50,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:51:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:50,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896027378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:50,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:50,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-21 12:51:50,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815515825] [2021-08-21 12:51:50,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:51:50,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:50,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:51:50,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:51:50,981 INFO L87 Difference]: Start difference. First operand 14730 states and 38387 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:58,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:58,623 INFO L93 Difference]: Finished difference Result 39135 states and 101835 transitions. [2021-08-21 12:51:58,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-08-21 12:51:58,624 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:51:58,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:58,697 INFO L225 Difference]: With dead ends: 39135 [2021-08-21 12:51:58,697 INFO L226 Difference]: Without dead ends: 37447 [2021-08-21 12:51:58,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15877 ImplicationChecksByTransitivity, 5918.8ms TimeCoverageRelationStatistics Valid=5024, Invalid=34776, Unknown=0, NotChecked=0, Total=39800 [2021-08-21 12:51:58,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37447 states. [2021-08-21 12:51:59,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37447 to 15646. [2021-08-21 12:51:59,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15646 states, 15645 states have (on average 2.616171300735059) internal successors, (40930), 15645 states have internal predecessors, (40930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15646 states to 15646 states and 40930 transitions. [2021-08-21 12:51:59,097 INFO L78 Accepts]: Start accepts. Automaton has 15646 states and 40930 transitions. Word has length 43 [2021-08-21 12:51:59,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:59,097 INFO L470 AbstractCegarLoop]: Abstraction has 15646 states and 40930 transitions. [2021-08-21 12:51:59,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 15646 states and 40930 transitions. [2021-08-21 12:51:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:51:59,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:59,117 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:59,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:59,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:59,321 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:51:59,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:59,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1765237341, now seen corresponding path program 43 times [2021-08-21 12:51:59,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:59,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991425842] [2021-08-21 12:51:59,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:59,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:51:59,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:59,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991425842] [2021-08-21 12:51:59,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991425842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:59,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299884076] [2021-08-21 12:51:59,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:51:59,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:59,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:59,689 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:51:59,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 12:52:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:01,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:52:01,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:02,810 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:52:02,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:52:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:02,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299884076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:02,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:02,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-21 12:52:02,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502423076] [2021-08-21 12:52:02,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:52:02,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:02,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:52:02,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:52:02,892 INFO L87 Difference]: Start difference. First operand 15646 states and 40930 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:09,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:09,148 INFO L93 Difference]: Finished difference Result 35088 states and 91436 transitions. [2021-08-21 12:52:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-08-21 12:52:09,148 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:52:09,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:09,210 INFO L225 Difference]: With dead ends: 35088 [2021-08-21 12:52:09,211 INFO L226 Difference]: Without dead ends: 33836 [2021-08-21 12:52:09,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11409 ImplicationChecksByTransitivity, 4747.4ms TimeCoverageRelationStatistics Valid=3608, Invalid=25804, Unknown=0, NotChecked=0, Total=29412 [2021-08-21 12:52:09,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33836 states. [2021-08-21 12:52:09,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33836 to 15814. [2021-08-21 12:52:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15814 states, 15813 states have (on average 2.6240435085056597) internal successors, (41494), 15813 states have internal predecessors, (41494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:09,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15814 states to 15814 states and 41494 transitions. [2021-08-21 12:52:09,596 INFO L78 Accepts]: Start accepts. Automaton has 15814 states and 41494 transitions. Word has length 43 [2021-08-21 12:52:09,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:09,596 INFO L470 AbstractCegarLoop]: Abstraction has 15814 states and 41494 transitions. [2021-08-21 12:52:09,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:09,596 INFO L276 IsEmpty]: Start isEmpty. Operand 15814 states and 41494 transitions. [2021-08-21 12:52:09,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:52:09,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:09,616 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:09,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:09,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 12:52:09,817 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:52:09,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:09,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1362386577, now seen corresponding path program 44 times [2021-08-21 12:52:09,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:09,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779467488] [2021-08-21 12:52:09,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:09,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:10,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:10,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779467488] [2021-08-21 12:52:10,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779467488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:10,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483838444] [2021-08-21 12:52:10,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:52:10,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:10,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:10,144 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:10,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 12:52:12,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:52:12,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:12,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:52:12,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:13,432 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:52:13,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:52:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:13,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483838444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:13,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:13,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-21 12:52:13,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454501654] [2021-08-21 12:52:13,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:52:13,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:13,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:52:13,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:52:13,518 INFO L87 Difference]: Start difference. First operand 15814 states and 41494 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:21,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:21,214 INFO L93 Difference]: Finished difference Result 36726 states and 96505 transitions. [2021-08-21 12:52:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-08-21 12:52:21,214 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:52:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:21,280 INFO L225 Difference]: With dead ends: 36726 [2021-08-21 12:52:21,280 INFO L226 Difference]: Without dead ends: 35185 [2021-08-21 12:52:21,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14698 ImplicationChecksByTransitivity, 5747.3ms TimeCoverageRelationStatistics Valid=4399, Invalid=33043, Unknown=0, NotChecked=0, Total=37442 [2021-08-21 12:52:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35185 states. [2021-08-21 12:52:21,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35185 to 17584. [2021-08-21 12:52:21,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17584 states, 17583 states have (on average 2.631120969117898) internal successors, (46263), 17583 states have internal predecessors, (46263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17584 states to 17584 states and 46263 transitions. [2021-08-21 12:52:21,665 INFO L78 Accepts]: Start accepts. Automaton has 17584 states and 46263 transitions. Word has length 43 [2021-08-21 12:52:21,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:21,665 INFO L470 AbstractCegarLoop]: Abstraction has 17584 states and 46263 transitions. [2021-08-21 12:52:21,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:21,666 INFO L276 IsEmpty]: Start isEmpty. Operand 17584 states and 46263 transitions. [2021-08-21 12:52:21,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:52:21,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:21,688 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:21,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:21,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 12:52:21,890 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:52:21,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:21,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1732218273, now seen corresponding path program 45 times [2021-08-21 12:52:21,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:21,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941932263] [2021-08-21 12:52:21,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:21,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:52:22,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:22,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941932263] [2021-08-21 12:52:22,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941932263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:22,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526946360] [2021-08-21 12:52:22,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:52:22,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:22,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:22,202 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:22,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 12:52:24,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:52:24,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:24,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:52:24,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:25,503 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:52:25,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:52:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:25,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526946360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:25,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:25,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-21 12:52:25,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894665583] [2021-08-21 12:52:25,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:52:25,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:25,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:52:25,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:52:25,587 INFO L87 Difference]: Start difference. First operand 17584 states and 46263 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:31,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:31,222 INFO L93 Difference]: Finished difference Result 31116 states and 80957 transitions. [2021-08-21 12:52:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-08-21 12:52:31,222 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:52:31,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:31,279 INFO L225 Difference]: With dead ends: 31116 [2021-08-21 12:52:31,279 INFO L226 Difference]: Without dead ends: 30074 [2021-08-21 12:52:31,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10628 ImplicationChecksByTransitivity, 4537.3ms TimeCoverageRelationStatistics Valid=3180, Invalid=24542, Unknown=0, NotChecked=0, Total=27722 [2021-08-21 12:52:31,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30074 states. [2021-08-21 12:52:31,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30074 to 18188. [2021-08-21 12:52:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18188 states, 18187 states have (on average 2.6371584098531917) internal successors, (47962), 18187 states have internal predecessors, (47962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18188 states to 18188 states and 47962 transitions. [2021-08-21 12:52:31,640 INFO L78 Accepts]: Start accepts. Automaton has 18188 states and 47962 transitions. Word has length 43 [2021-08-21 12:52:31,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:31,640 INFO L470 AbstractCegarLoop]: Abstraction has 18188 states and 47962 transitions. [2021-08-21 12:52:31,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:31,641 INFO L276 IsEmpty]: Start isEmpty. Operand 18188 states and 47962 transitions. [2021-08-21 12:52:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:52:31,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:31,664 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:31,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:31,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 12:52:31,864 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:52:31,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:31,865 INFO L82 PathProgramCache]: Analyzing trace with hash 967636309, now seen corresponding path program 46 times [2021-08-21 12:52:31,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:31,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073616609] [2021-08-21 12:52:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:31,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:32,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:32,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073616609] [2021-08-21 12:52:32,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073616609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:32,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834064075] [2021-08-21 12:52:32,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:52:32,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:32,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:32,431 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:32,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 12:52:34,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:52:34,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:34,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:52:34,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:35,758 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:52:35,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:52:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:35,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834064075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:35,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:35,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-21 12:52:35,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054974809] [2021-08-21 12:52:35,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:52:35,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:35,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:52:35,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:52:35,849 INFO L87 Difference]: Start difference. First operand 18188 states and 47962 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:40,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:40,598 INFO L93 Difference]: Finished difference Result 41162 states and 107180 transitions. [2021-08-21 12:52:40,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-08-21 12:52:40,598 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:52:40,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:40,675 INFO L225 Difference]: With dead ends: 41162 [2021-08-21 12:52:40,675 INFO L226 Difference]: Without dead ends: 40738 [2021-08-21 12:52:40,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8047 ImplicationChecksByTransitivity, 4390.5ms TimeCoverageRelationStatistics Valid=3368, Invalid=20194, Unknown=0, NotChecked=0, Total=23562 [2021-08-21 12:52:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40738 states. [2021-08-21 12:52:41,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40738 to 20772. [2021-08-21 12:52:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20772 states, 20771 states have (on average 2.6264503394155314) internal successors, (54554), 20771 states have internal predecessors, (54554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:41,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20772 states to 20772 states and 54554 transitions. [2021-08-21 12:52:41,176 INFO L78 Accepts]: Start accepts. Automaton has 20772 states and 54554 transitions. Word has length 43 [2021-08-21 12:52:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:41,176 INFO L470 AbstractCegarLoop]: Abstraction has 20772 states and 54554 transitions. [2021-08-21 12:52:41,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:41,177 INFO L276 IsEmpty]: Start isEmpty. Operand 20772 states and 54554 transitions. [2021-08-21 12:52:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:52:41,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:41,202 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:41,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:41,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:41,406 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:52:41,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:41,407 INFO L82 PathProgramCache]: Analyzing trace with hash -678285713, now seen corresponding path program 47 times [2021-08-21 12:52:41,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:41,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973227290] [2021-08-21 12:52:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:41,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:41,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:41,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973227290] [2021-08-21 12:52:41,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973227290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:41,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693582128] [2021-08-21 12:52:41,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:52:41,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:41,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:41,768 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:41,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 12:52:44,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:52:44,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:44,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:52:44,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:45,416 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:52:45,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:52:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:45,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693582128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:45,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:45,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-21 12:52:45,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311302245] [2021-08-21 12:52:45,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:52:45,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:45,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:52:45,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1383, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:52:45,524 INFO L87 Difference]: Start difference. First operand 20772 states and 54554 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:52,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:52,919 INFO L93 Difference]: Finished difference Result 43098 states and 112533 transitions. [2021-08-21 12:52:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-08-21 12:52:52,920 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:52:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:52,998 INFO L225 Difference]: With dead ends: 43098 [2021-08-21 12:52:52,998 INFO L226 Difference]: Without dead ends: 42265 [2021-08-21 12:52:53,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13826 ImplicationChecksByTransitivity, 6325.4ms TimeCoverageRelationStatistics Valid=5742, Invalid=31314, Unknown=0, NotChecked=0, Total=37056 [2021-08-21 12:52:53,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42265 states. [2021-08-21 12:52:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42265 to 20662. [2021-08-21 12:52:53,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20662 states, 20661 states have (on average 2.620250713905426) internal successors, (54137), 20661 states have internal predecessors, (54137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:53,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20662 states to 20662 states and 54137 transitions. [2021-08-21 12:52:53,490 INFO L78 Accepts]: Start accepts. Automaton has 20662 states and 54137 transitions. Word has length 43 [2021-08-21 12:52:53,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:53,490 INFO L470 AbstractCegarLoop]: Abstraction has 20662 states and 54137 transitions. [2021-08-21 12:52:53,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:53,491 INFO L276 IsEmpty]: Start isEmpty. Operand 20662 states and 54137 transitions. [2021-08-21 12:52:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:52:53,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:53,516 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:53,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:53,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 12:52:53,717 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:52:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:53,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1669653611, now seen corresponding path program 48 times [2021-08-21 12:52:53,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:53,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842930218] [2021-08-21 12:52:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:53,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:54,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:54,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842930218] [2021-08-21 12:52:54,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842930218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:54,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907163372] [2021-08-21 12:52:54,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:52:54,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:54,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:54,092 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:52:54,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 12:52:56,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:52:56,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:56,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:52:56,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:57,668 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-21 12:52:57,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 33 [2021-08-21 12:52:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:57,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907163372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:57,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:57,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-21 12:52:57,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308215483] [2021-08-21 12:52:57,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:52:57,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:57,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:52:57,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1388, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:52:57,769 INFO L87 Difference]: Start difference. First operand 20662 states and 54137 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:03,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:03,649 INFO L93 Difference]: Finished difference Result 36835 states and 96109 transitions. [2021-08-21 12:53:03,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-08-21 12:53:03,650 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:53:03,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:03,722 INFO L225 Difference]: With dead ends: 36835 [2021-08-21 12:53:03,722 INFO L226 Difference]: Without dead ends: 36120 [2021-08-21 12:53:03,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9271 ImplicationChecksByTransitivity, 4990.8ms TimeCoverageRelationStatistics Valid=3875, Invalid=22857, Unknown=0, NotChecked=0, Total=26732 [2021-08-21 12:53:03,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36120 states. [2021-08-21 12:53:04,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36120 to 21190. [2021-08-21 12:53:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21190 states, 21189 states have (on average 2.6209353910047666) internal successors, (55535), 21189 states have internal predecessors, (55535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:04,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21190 states to 21190 states and 55535 transitions. [2021-08-21 12:53:04,206 INFO L78 Accepts]: Start accepts. Automaton has 21190 states and 55535 transitions. Word has length 43 [2021-08-21 12:53:04,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:04,207 INFO L470 AbstractCegarLoop]: Abstraction has 21190 states and 55535 transitions. [2021-08-21 12:53:04,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:04,207 INFO L276 IsEmpty]: Start isEmpty. Operand 21190 states and 55535 transitions. [2021-08-21 12:53:04,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:53:04,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:04,234 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:04,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:04,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:04,434 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:53:04,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:04,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1553691605, now seen corresponding path program 49 times [2021-08-21 12:53:04,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:04,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827941845] [2021-08-21 12:53:04,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:04,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:04,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:04,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827941845] [2021-08-21 12:53:04,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827941845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:04,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047689185] [2021-08-21 12:53:04,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:53:04,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:04,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:04,853 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:04,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 12:53:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:07,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:53:07,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:08,343 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:53:08,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:53:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:08,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047689185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:08,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:08,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-21 12:53:08,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307736816] [2021-08-21 12:53:08,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:53:08,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:08,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:53:08,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1390, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:53:08,438 INFO L87 Difference]: Start difference. First operand 21190 states and 55535 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:13,846 INFO L93 Difference]: Finished difference Result 36497 states and 95280 transitions. [2021-08-21 12:53:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-08-21 12:53:13,847 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:53:13,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:13,926 INFO L225 Difference]: With dead ends: 36497 [2021-08-21 12:53:13,926 INFO L226 Difference]: Without dead ends: 36323 [2021-08-21 12:53:13,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9330 ImplicationChecksByTransitivity, 4904.4ms TimeCoverageRelationStatistics Valid=3611, Invalid=22795, Unknown=0, NotChecked=0, Total=26406 [2021-08-21 12:53:13,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36323 states. [2021-08-21 12:53:14,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36323 to 21058. [2021-08-21 12:53:14,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21058 states, 21057 states have (on average 2.6215985183074513) internal successors, (55203), 21057 states have internal predecessors, (55203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21058 states to 21058 states and 55203 transitions. [2021-08-21 12:53:14,410 INFO L78 Accepts]: Start accepts. Automaton has 21058 states and 55203 transitions. Word has length 43 [2021-08-21 12:53:14,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:14,410 INFO L470 AbstractCegarLoop]: Abstraction has 21058 states and 55203 transitions. [2021-08-21 12:53:14,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:14,411 INFO L276 IsEmpty]: Start isEmpty. Operand 21058 states and 55203 transitions. [2021-08-21 12:53:14,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:53:14,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:14,436 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:14,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:14,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 12:53:14,636 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:53:14,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:14,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1491301319, now seen corresponding path program 50 times [2021-08-21 12:53:14,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:14,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769273116] [2021-08-21 12:53:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:14,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:53:15,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:15,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769273116] [2021-08-21 12:53:15,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769273116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:15,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620257001] [2021-08-21 12:53:15,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:53:15,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:15,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:15,139 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:15,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 12:53:17,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:53:17,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:17,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:53:17,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:18,617 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:53:18,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:53:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:18,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620257001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:18,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:18,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-21 12:53:18,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406677757] [2021-08-21 12:53:18,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:53:18,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:18,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:53:18,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:53:18,699 INFO L87 Difference]: Start difference. First operand 21058 states and 55203 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:24,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:24,802 INFO L93 Difference]: Finished difference Result 42725 states and 111850 transitions. [2021-08-21 12:53:24,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-08-21 12:53:24,802 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:53:24,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:24,879 INFO L225 Difference]: With dead ends: 42725 [2021-08-21 12:53:24,879 INFO L226 Difference]: Without dead ends: 41661 [2021-08-21 12:53:24,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11020 ImplicationChecksByTransitivity, 4659.8ms TimeCoverageRelationStatistics Valid=3483, Invalid=24573, Unknown=0, NotChecked=0, Total=28056 [2021-08-21 12:53:24,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41661 states. [2021-08-21 12:53:25,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41661 to 22906. [2021-08-21 12:53:25,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22906 states, 22905 states have (on average 2.629294913774285) internal successors, (60224), 22905 states have internal predecessors, (60224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22906 states to 22906 states and 60224 transitions. [2021-08-21 12:53:25,384 INFO L78 Accepts]: Start accepts. Automaton has 22906 states and 60224 transitions. Word has length 43 [2021-08-21 12:53:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:25,384 INFO L470 AbstractCegarLoop]: Abstraction has 22906 states and 60224 transitions. [2021-08-21 12:53:25,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:25,384 INFO L276 IsEmpty]: Start isEmpty. Operand 22906 states and 60224 transitions. [2021-08-21 12:53:25,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:53:25,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:25,412 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:25,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:25,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-21 12:53:25,612 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:53:25,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:25,613 INFO L82 PathProgramCache]: Analyzing trace with hash -728298909, now seen corresponding path program 51 times [2021-08-21 12:53:25,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:25,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391585569] [2021-08-21 12:53:25,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:25,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:53:25,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:25,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391585569] [2021-08-21 12:53:25,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391585569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:25,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728275558] [2021-08-21 12:53:25,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:53:25,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:25,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:25,913 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:25,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 12:53:28,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:53:28,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:28,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:53:28,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:29,545 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:53:29,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:53:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:29,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728275558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:29,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:29,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-21 12:53:29,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850358878] [2021-08-21 12:53:29,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:53:29,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:29,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:53:29,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:53:29,631 INFO L87 Difference]: Start difference. First operand 22906 states and 60224 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:35,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:35,732 INFO L93 Difference]: Finished difference Result 43115 states and 112358 transitions. [2021-08-21 12:53:35,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-08-21 12:53:35,732 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:53:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:35,805 INFO L225 Difference]: With dead ends: 43115 [2021-08-21 12:53:35,805 INFO L226 Difference]: Without dead ends: 41981 [2021-08-21 12:53:35,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11957 ImplicationChecksByTransitivity, 4798.9ms TimeCoverageRelationStatistics Valid=3626, Invalid=26476, Unknown=0, NotChecked=0, Total=30102 [2021-08-21 12:53:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41981 states. [2021-08-21 12:53:36,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41981 to 23906. [2021-08-21 12:53:36,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23906 states, 23905 states have (on average 2.633423969880778) internal successors, (62952), 23905 states have internal predecessors, (62952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23906 states to 23906 states and 62952 transitions. [2021-08-21 12:53:36,331 INFO L78 Accepts]: Start accepts. Automaton has 23906 states and 62952 transitions. Word has length 43 [2021-08-21 12:53:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:36,332 INFO L470 AbstractCegarLoop]: Abstraction has 23906 states and 62952 transitions. [2021-08-21 12:53:36,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 23906 states and 62952 transitions. [2021-08-21 12:53:36,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:53:36,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:36,361 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:36,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:36,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:36,562 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:53:36,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:36,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1722746741, now seen corresponding path program 52 times [2021-08-21 12:53:36,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:36,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234194258] [2021-08-21 12:53:36,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:36,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:36,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:36,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234194258] [2021-08-21 12:53:36,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234194258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:36,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776131186] [2021-08-21 12:53:36,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:53:36,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:36,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:36,865 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:36,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 12:53:39,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:53:39,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:39,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:53:39,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:40,558 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:53:40,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:53:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:40,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776131186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:40,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:40,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-21 12:53:40,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978028712] [2021-08-21 12:53:40,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:53:40,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:40,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:53:40,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:53:40,643 INFO L87 Difference]: Start difference. First operand 23906 states and 62952 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:48,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:48,371 INFO L93 Difference]: Finished difference Result 57390 states and 151751 transitions. [2021-08-21 12:53:48,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-08-21 12:53:48,371 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:53:48,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:48,490 INFO L225 Difference]: With dead ends: 57390 [2021-08-21 12:53:48,490 INFO L226 Difference]: Without dead ends: 56187 [2021-08-21 12:53:48,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14187 ImplicationChecksByTransitivity, 6012.3ms TimeCoverageRelationStatistics Valid=5074, Invalid=31598, Unknown=0, NotChecked=0, Total=36672 [2021-08-21 12:53:48,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56187 states. [2021-08-21 12:53:49,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56187 to 25132. [2021-08-21 12:53:49,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25132 states, 25131 states have (on average 2.6295014125979868) internal successors, (66082), 25131 states have internal predecessors, (66082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:49,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25132 states to 25132 states and 66082 transitions. [2021-08-21 12:53:49,203 INFO L78 Accepts]: Start accepts. Automaton has 25132 states and 66082 transitions. Word has length 43 [2021-08-21 12:53:49,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:49,203 INFO L470 AbstractCegarLoop]: Abstraction has 25132 states and 66082 transitions. [2021-08-21 12:53:49,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:49,204 INFO L276 IsEmpty]: Start isEmpty. Operand 25132 states and 66082 transitions. [2021-08-21 12:53:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:53:49,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:49,233 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:49,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:49,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 12:53:49,433 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:53:49,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:49,434 INFO L82 PathProgramCache]: Analyzing trace with hash 731378843, now seen corresponding path program 53 times [2021-08-21 12:53:49,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:49,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492151030] [2021-08-21 12:53:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:49,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:49,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:49,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492151030] [2021-08-21 12:53:49,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492151030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:49,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069762951] [2021-08-21 12:53:49,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:53:49,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:49,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:49,861 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:53:49,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 12:53:52,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:53:52,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:52,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:53:52,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:53,775 INFO L354 Elim1Store]: treesize reduction 296, result has 4.2 percent of original size [2021-08-21 12:53:53,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 58 treesize of output 42 [2021-08-21 12:53:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:53,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069762951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:53,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:53,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-21 12:53:53,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772956991] [2021-08-21 12:53:53,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:53:53,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:53,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:53:53,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:53:53,865 INFO L87 Difference]: Start difference. First operand 25132 states and 66082 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:00,936 INFO L93 Difference]: Finished difference Result 47824 states and 125439 transitions. [2021-08-21 12:54:00,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-08-21 12:54:00,936 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:54:00,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:01,029 INFO L225 Difference]: With dead ends: 47824 [2021-08-21 12:54:01,029 INFO L226 Difference]: Without dead ends: 47103 [2021-08-21 12:54:01,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12426 ImplicationChecksByTransitivity, 5616.2ms TimeCoverageRelationStatistics Valid=4478, Invalid=28464, Unknown=0, NotChecked=0, Total=32942 [2021-08-21 12:54:01,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47103 states. [2021-08-21 12:54:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47103 to 25460. [2021-08-21 12:54:01,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25460 states, 25459 states have (on average 2.6247299579716405) internal successors, (66823), 25459 states have internal predecessors, (66823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25460 states to 25460 states and 66823 transitions. [2021-08-21 12:54:01,639 INFO L78 Accepts]: Start accepts. Automaton has 25460 states and 66823 transitions. Word has length 43 [2021-08-21 12:54:01,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:01,639 INFO L470 AbstractCegarLoop]: Abstraction has 25460 states and 66823 transitions. [2021-08-21 12:54:01,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:01,640 INFO L276 IsEmpty]: Start isEmpty. Operand 25460 states and 66823 transitions. [2021-08-21 12:54:01,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:54:01,672 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:01,672 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:01,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 12:54:01,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 12:54:01,873 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:54:01,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:01,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1439841201, now seen corresponding path program 54 times [2021-08-21 12:54:01,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:01,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971512086] [2021-08-21 12:54:01,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:01,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:54:02,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:02,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971512086] [2021-08-21 12:54:02,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971512086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:02,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364664886] [2021-08-21 12:54:02,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:54:02,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:02,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:02,168 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:54:02,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 12:54:05,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:54:05,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:05,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:54:05,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:06,316 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-08-21 12:54:06,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 40 [2021-08-21 12:54:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:06,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364664886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:06,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:06,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-21 12:54:06,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407538794] [2021-08-21 12:54:06,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:54:06,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:06,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:54:06,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:54:06,428 INFO L87 Difference]: Start difference. First operand 25460 states and 66823 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:12,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:12,820 INFO L93 Difference]: Finished difference Result 47035 states and 122823 transitions. [2021-08-21 12:54:12,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-08-21 12:54:12,820 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:54:12,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:12,900 INFO L225 Difference]: With dead ends: 47035 [2021-08-21 12:54:12,900 INFO L226 Difference]: Without dead ends: 45853 [2021-08-21 12:54:12,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12496 ImplicationChecksByTransitivity, 4907.6ms TimeCoverageRelationStatistics Valid=3951, Invalid=27911, Unknown=0, NotChecked=0, Total=31862 [2021-08-21 12:54:12,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45853 states. [2021-08-21 12:54:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45853 to 23942. [2021-08-21 12:54:13,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23942 states, 23941 states have (on average 2.620233072971054) internal successors, (62731), 23941 states have internal predecessors, (62731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:13,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23942 states to 23942 states and 62731 transitions. [2021-08-21 12:54:13,496 INFO L78 Accepts]: Start accepts. Automaton has 23942 states and 62731 transitions. Word has length 43 [2021-08-21 12:54:13,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:13,496 INFO L470 AbstractCegarLoop]: Abstraction has 23942 states and 62731 transitions. [2021-08-21 12:54:13,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:13,497 INFO L276 IsEmpty]: Start isEmpty. Operand 23942 states and 62731 transitions. [2021-08-21 12:54:13,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:54:13,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:13,526 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:13,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 12:54:13,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:13,727 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:54:13,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:13,727 INFO L82 PathProgramCache]: Analyzing trace with hash -776905693, now seen corresponding path program 55 times [2021-08-21 12:54:13,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:13,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135618854] [2021-08-21 12:54:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:13,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:54:14,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:14,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135618854] [2021-08-21 12:54:14,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135618854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:14,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547133995] [2021-08-21 12:54:14,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:54:14,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:14,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:14,218 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:54:14,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 12:54:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:17,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:54:17,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:18,007 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:54:18,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:54:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:18,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547133995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:18,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:18,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2021-08-21 12:54:18,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279764150] [2021-08-21 12:54:18,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 12:54:18,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:18,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 12:54:18,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:54:18,100 INFO L87 Difference]: Start difference. First operand 23942 states and 62731 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 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) [2021-08-21 12:54:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:24,243 INFO L93 Difference]: Finished difference Result 58666 states and 151807 transitions. [2021-08-21 12:54:24,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-08-21 12:54:24,244 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 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 43 [2021-08-21 12:54:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:24,363 INFO L225 Difference]: With dead ends: 58666 [2021-08-21 12:54:24,364 INFO L226 Difference]: Without dead ends: 58347 [2021-08-21 12:54:24,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10927 ImplicationChecksByTransitivity, 5240.9ms TimeCoverageRelationStatistics Valid=3986, Invalid=26116, Unknown=0, NotChecked=0, Total=30102 [2021-08-21 12:54:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58347 states. [2021-08-21 12:54:24,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58347 to 25024. [2021-08-21 12:54:24,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25024 states, 25023 states have (on average 2.616392918514966) internal successors, (65470), 25023 states have internal predecessors, (65470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25024 states to 25024 states and 65470 transitions. [2021-08-21 12:54:25,036 INFO L78 Accepts]: Start accepts. Automaton has 25024 states and 65470 transitions. Word has length 43 [2021-08-21 12:54:25,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:25,036 INFO L470 AbstractCegarLoop]: Abstraction has 25024 states and 65470 transitions. [2021-08-21 12:54:25,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 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) [2021-08-21 12:54:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 25024 states and 65470 transitions. [2021-08-21 12:54:25,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:54:25,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:25,067 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:25,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-21 12:54:25,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:25,272 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:54:25,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:25,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1181384213, now seen corresponding path program 56 times [2021-08-21 12:54:25,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:25,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945992006] [2021-08-21 12:54:25,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:25,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:54:25,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:25,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945992006] [2021-08-21 12:54:25,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945992006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:25,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206150477] [2021-08-21 12:54:25,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:54:25,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:25,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:25,554 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:54:25,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 12:54:28,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:54:28,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:28,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:54:28,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:29,653 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:54:29,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:54:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:29,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206150477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:29,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:29,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-21 12:54:29,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714411912] [2021-08-21 12:54:29,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 12:54:29,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:29,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 12:54:29,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:54:29,740 INFO L87 Difference]: Start difference. First operand 25024 states and 65470 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 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) [2021-08-21 12:54:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:36,477 INFO L93 Difference]: Finished difference Result 56687 states and 148119 transitions. [2021-08-21 12:54:36,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-08-21 12:54:36,477 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 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 43 [2021-08-21 12:54:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:36,593 INFO L225 Difference]: With dead ends: 56687 [2021-08-21 12:54:36,593 INFO L226 Difference]: Without dead ends: 56059 [2021-08-21 12:54:36,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11809 ImplicationChecksByTransitivity, 5179.6ms TimeCoverageRelationStatistics Valid=4212, Invalid=26940, Unknown=0, NotChecked=0, Total=31152 [2021-08-21 12:54:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56059 states. [2021-08-21 12:54:37,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56059 to 27366. [2021-08-21 12:54:37,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27366 states, 27365 states have (on average 2.6159327608258724) internal successors, (71585), 27365 states have internal predecessors, (71585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:37,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27366 states to 27366 states and 71585 transitions. [2021-08-21 12:54:37,429 INFO L78 Accepts]: Start accepts. Automaton has 27366 states and 71585 transitions. Word has length 43 [2021-08-21 12:54:37,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:37,429 INFO L470 AbstractCegarLoop]: Abstraction has 27366 states and 71585 transitions. [2021-08-21 12:54:37,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 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) [2021-08-21 12:54:37,430 INFO L276 IsEmpty]: Start isEmpty. Operand 27366 states and 71585 transitions. [2021-08-21 12:54:37,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:54:37,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:37,467 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:37,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 12:54:37,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:37,667 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:54:37,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:37,668 INFO L82 PathProgramCache]: Analyzing trace with hash -401806063, now seen corresponding path program 57 times [2021-08-21 12:54:37,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:37,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008972151] [2021-08-21 12:54:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:37,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:54:37,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:37,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008972151] [2021-08-21 12:54:37,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008972151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:37,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72310756] [2021-08-21 12:54:37,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:54:37,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:37,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:37,950 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:54:37,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 12:54:41,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:54:41,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:41,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 12:54:41,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:42,021 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:54:42,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:54:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:42,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72310756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:42,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:42,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-21 12:54:42,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448152030] [2021-08-21 12:54:42,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 12:54:42,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:42,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 12:54:42,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:54:42,103 INFO L87 Difference]: Start difference. First operand 27366 states and 71585 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:49,631 INFO L93 Difference]: Finished difference Result 54033 states and 141675 transitions. [2021-08-21 12:54:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-08-21 12:54:49,632 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:54:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:49,745 INFO L225 Difference]: With dead ends: 54033 [2021-08-21 12:54:49,745 INFO L226 Difference]: Without dead ends: 53143 [2021-08-21 12:54:49,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14877 ImplicationChecksByTransitivity, 5790.6ms TimeCoverageRelationStatistics Valid=4543, Invalid=33287, Unknown=0, NotChecked=0, Total=37830 [2021-08-21 12:54:49,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53143 states. [2021-08-21 12:54:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53143 to 32634. [2021-08-21 12:54:50,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32634 states, 32633 states have (on average 2.6135200563846412) internal successors, (85287), 32633 states have internal predecessors, (85287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:50,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32634 states to 32634 states and 85287 transitions. [2021-08-21 12:54:50,495 INFO L78 Accepts]: Start accepts. Automaton has 32634 states and 85287 transitions. Word has length 43 [2021-08-21 12:54:50,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:50,495 INFO L470 AbstractCegarLoop]: Abstraction has 32634 states and 85287 transitions. [2021-08-21 12:54:50,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:50,496 INFO L276 IsEmpty]: Start isEmpty. Operand 32634 states and 85287 transitions. [2021-08-21 12:54:50,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:54:50,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:50,541 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:50,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 12:54:50,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 12:54:50,741 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:54:50,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:50,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1832850237, now seen corresponding path program 58 times [2021-08-21 12:54:50,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:50,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865193682] [2021-08-21 12:54:50,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:50,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:51,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:51,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865193682] [2021-08-21 12:54:51,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865193682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:51,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788757277] [2021-08-21 12:54:51,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:54:51,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:51,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:51,248 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:54:51,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 12:54:54,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:54:54,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:54,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:54:54,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:55,500 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:54:55,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:54:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:55,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788757277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:55,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:55,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-21 12:54:55,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859810111] [2021-08-21 12:54:55,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:54:55,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:55,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:54:55,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:54:55,586 INFO L87 Difference]: Start difference. First operand 32634 states and 85287 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:01,256 INFO L93 Difference]: Finished difference Result 78094 states and 203927 transitions. [2021-08-21 12:55:01,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-08-21 12:55:01,257 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:55:01,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:01,475 INFO L225 Difference]: With dead ends: 78094 [2021-08-21 12:55:01,475 INFO L226 Difference]: Without dead ends: 77668 [2021-08-21 12:55:01,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10052 ImplicationChecksByTransitivity, 4687.5ms TimeCoverageRelationStatistics Valid=3527, Invalid=24195, Unknown=0, NotChecked=0, Total=27722 [2021-08-21 12:55:01,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77668 states. [2021-08-21 12:55:02,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77668 to 35868. [2021-08-21 12:55:02,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35868 states, 35867 states have (on average 2.603841971728887) internal successors, (93392), 35867 states have internal predecessors, (93392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:02,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35868 states to 35868 states and 93392 transitions. [2021-08-21 12:55:02,585 INFO L78 Accepts]: Start accepts. Automaton has 35868 states and 93392 transitions. Word has length 43 [2021-08-21 12:55:02,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:02,585 INFO L470 AbstractCegarLoop]: Abstraction has 35868 states and 93392 transitions. [2021-08-21 12:55:02,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:02,585 INFO L276 IsEmpty]: Start isEmpty. Operand 35868 states and 93392 transitions. [2021-08-21 12:55:02,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:55:02,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:02,635 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:02,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:02,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-21 12:55:02,839 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:55:02,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:02,839 INFO L82 PathProgramCache]: Analyzing trace with hash 841482339, now seen corresponding path program 59 times [2021-08-21 12:55:02,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:02,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711528974] [2021-08-21 12:55:02,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:02,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:03,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:03,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711528974] [2021-08-21 12:55:03,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711528974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:03,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771586730] [2021-08-21 12:55:03,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:55:03,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:03,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:03,355 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:03,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 12:55:06,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:55:06,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:06,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:55:06,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:07,555 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:55:07,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:55:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:07,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771586730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:07,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:07,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-21 12:55:07,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831913803] [2021-08-21 12:55:07,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:55:07,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:07,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:55:07,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:55:07,644 INFO L87 Difference]: Start difference. First operand 35868 states and 93392 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:13,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:13,027 INFO L93 Difference]: Finished difference Result 60994 states and 158793 transitions. [2021-08-21 12:55:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-08-21 12:55:13,028 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:55:13,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:13,163 INFO L225 Difference]: With dead ends: 60994 [2021-08-21 12:55:13,164 INFO L226 Difference]: Without dead ends: 60822 [2021-08-21 12:55:13,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8119 ImplicationChecksByTransitivity, 4607.5ms TimeCoverageRelationStatistics Valid=3345, Invalid=19911, Unknown=0, NotChecked=0, Total=23256 [2021-08-21 12:55:13,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60822 states. [2021-08-21 12:55:13,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60822 to 35372. [2021-08-21 12:55:13,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35372 states, 35371 states have (on average 2.6034321902123208) internal successors, (92086), 35371 states have internal predecessors, (92086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35372 states to 35372 states and 92086 transitions. [2021-08-21 12:55:14,036 INFO L78 Accepts]: Start accepts. Automaton has 35372 states and 92086 transitions. Word has length 43 [2021-08-21 12:55:14,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:14,036 INFO L470 AbstractCegarLoop]: Abstraction has 35372 states and 92086 transitions. [2021-08-21 12:55:14,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:14,036 INFO L276 IsEmpty]: Start isEmpty. Operand 35372 states and 92086 transitions. [2021-08-21 12:55:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:55:14,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:14,084 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:14,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:14,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-21 12:55:14,284 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:55:14,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:14,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1239403435, now seen corresponding path program 60 times [2021-08-21 12:55:14,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:14,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504753312] [2021-08-21 12:55:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:14,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:55:14,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:14,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504753312] [2021-08-21 12:55:14,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504753312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:14,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933596184] [2021-08-21 12:55:14,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:55:14,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:14,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:14,543 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:14,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 12:55:18,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:55:18,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:18,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:55:18,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:18,938 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:55:18,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:55:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:19,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933596184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:19,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:19,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-21 12:55:19,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882170683] [2021-08-21 12:55:19,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 12:55:19,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:19,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 12:55:19,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:55:19,041 INFO L87 Difference]: Start difference. First operand 35372 states and 92086 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 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) [2021-08-21 12:55:24,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:24,408 INFO L93 Difference]: Finished difference Result 56714 states and 146657 transitions. [2021-08-21 12:55:24,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-08-21 12:55:24,409 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 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 43 [2021-08-21 12:55:24,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:24,529 INFO L225 Difference]: With dead ends: 56714 [2021-08-21 12:55:24,529 INFO L226 Difference]: Without dead ends: 56264 [2021-08-21 12:55:24,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8386 ImplicationChecksByTransitivity, 4150.8ms TimeCoverageRelationStatistics Valid=3168, Invalid=20088, Unknown=0, NotChecked=0, Total=23256 [2021-08-21 12:55:24,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56264 states. [2021-08-21 12:55:25,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56264 to 35524. [2021-08-21 12:55:25,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35524 states, 35523 states have (on average 2.6022013906483124) internal successors, (92438), 35523 states have internal predecessors, (92438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:25,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35524 states to 35524 states and 92438 transitions. [2021-08-21 12:55:25,364 INFO L78 Accepts]: Start accepts. Automaton has 35524 states and 92438 transitions. Word has length 43 [2021-08-21 12:55:25,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:25,364 INFO L470 AbstractCegarLoop]: Abstraction has 35524 states and 92438 transitions. [2021-08-21 12:55:25,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 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) [2021-08-21 12:55:25,364 INFO L276 IsEmpty]: Start isEmpty. Operand 35524 states and 92438 transitions. [2021-08-21 12:55:25,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:55:25,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:25,412 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:25,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:25,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:25,622 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:55:25,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:25,622 INFO L82 PathProgramCache]: Analyzing trace with hash -454744491, now seen corresponding path program 61 times [2021-08-21 12:55:25,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:25,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801366360] [2021-08-21 12:55:25,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:25,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:55:26,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:26,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801366360] [2021-08-21 12:55:26,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801366360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:26,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024815074] [2021-08-21 12:55:26,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:55:26,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:26,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:26,112 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:26,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 12:55:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:29,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:55:29,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:30,540 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:55:30,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:55:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:30,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024815074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:30,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:30,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 36 [2021-08-21 12:55:30,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008280071] [2021-08-21 12:55:30,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 12:55:30,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:30,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 12:55:30,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:55:30,631 INFO L87 Difference]: Start difference. First operand 35524 states and 92438 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 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) [2021-08-21 12:55:36,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:36,932 INFO L93 Difference]: Finished difference Result 58496 states and 151421 transitions. [2021-08-21 12:55:36,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-08-21 12:55:36,932 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 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 43 [2021-08-21 12:55:36,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:37,062 INFO L225 Difference]: With dead ends: 58496 [2021-08-21 12:55:37,062 INFO L226 Difference]: Without dead ends: 58142 [2021-08-21 12:55:37,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11906 ImplicationChecksByTransitivity, 4922.4ms TimeCoverageRelationStatistics Valid=3892, Invalid=27260, Unknown=0, NotChecked=0, Total=31152 [2021-08-21 12:55:37,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58142 states. [2021-08-21 12:55:37,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58142 to 35476. [2021-08-21 12:55:37,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35476 states, 35475 states have (on average 2.603326286116984) internal successors, (92353), 35475 states have internal predecessors, (92353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35476 states to 35476 states and 92353 transitions. [2021-08-21 12:55:38,140 INFO L78 Accepts]: Start accepts. Automaton has 35476 states and 92353 transitions. Word has length 43 [2021-08-21 12:55:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:38,141 INFO L470 AbstractCegarLoop]: Abstraction has 35476 states and 92353 transitions. [2021-08-21 12:55:38,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 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) [2021-08-21 12:55:38,141 INFO L276 IsEmpty]: Start isEmpty. Operand 35476 states and 92353 transitions. [2021-08-21 12:55:38,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:55:38,187 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:38,187 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:38,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:38,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:38,388 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:55:38,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:38,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1258593617, now seen corresponding path program 62 times [2021-08-21 12:55:38,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:38,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936370682] [2021-08-21 12:55:38,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:38,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:38,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:38,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936370682] [2021-08-21 12:55:38,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936370682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:38,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621566512] [2021-08-21 12:55:38,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:55:38,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:38,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:38,798 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:38,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 12:55:42,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:55:42,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:42,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 12:55:42,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:43,199 INFO L354 Elim1Store]: treesize reduction 110, result has 2.7 percent of original size [2021-08-21 12:55:43,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 33 [2021-08-21 12:55:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:43,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621566512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:43,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:43,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-21 12:55:43,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726770138] [2021-08-21 12:55:43,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:55:43,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:43,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:55:43,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1382, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:55:43,292 INFO L87 Difference]: Start difference. First operand 35476 states and 92353 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:48,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:48,649 INFO L93 Difference]: Finished difference Result 53802 states and 139715 transitions. [2021-08-21 12:55:48,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-08-21 12:55:48,650 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:55:48,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:48,778 INFO L225 Difference]: With dead ends: 53802 [2021-08-21 12:55:48,778 INFO L226 Difference]: Without dead ends: 52775 [2021-08-21 12:55:48,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8233 ImplicationChecksByTransitivity, 4468.0ms TimeCoverageRelationStatistics Valid=3355, Invalid=19901, Unknown=0, NotChecked=0, Total=23256 [2021-08-21 12:55:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52775 states. [2021-08-21 12:55:49,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52775 to 36900. [2021-08-21 12:55:49,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36900 states, 36899 states have (on average 2.6020759370172635) internal successors, (96014), 36899 states have internal predecessors, (96014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36900 states to 36900 states and 96014 transitions. [2021-08-21 12:55:49,648 INFO L78 Accepts]: Start accepts. Automaton has 36900 states and 96014 transitions. Word has length 43 [2021-08-21 12:55:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:49,648 INFO L470 AbstractCegarLoop]: Abstraction has 36900 states and 96014 transitions. [2021-08-21 12:55:49,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 36900 states and 96014 transitions. [2021-08-21 12:55:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:55:49,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:49,700 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:49,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-21 12:55:49,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 12:55:49,901 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:55:49,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:49,901 INFO L82 PathProgramCache]: Analyzing trace with hash -387328405, now seen corresponding path program 63 times [2021-08-21 12:55:49,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:49,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481315923] [2021-08-21 12:55:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:49,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:50,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:50,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481315923] [2021-08-21 12:55:50,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481315923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:50,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598167765] [2021-08-21 12:55:50,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:55:50,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:50,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:50,296 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:55:50,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 12:55:54,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:55:54,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:54,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:55:54,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:54,962 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:55:54,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:55:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:55,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598167765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:55,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:55,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-21 12:55:55,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667015294] [2021-08-21 12:55:55,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:55:55,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:55,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:55:55,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:55:55,057 INFO L87 Difference]: Start difference. First operand 36900 states and 96014 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:01,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:01,138 INFO L93 Difference]: Finished difference Result 53184 states and 137683 transitions. [2021-08-21 12:56:01,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-08-21 12:56:01,141 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:56:01,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:01,260 INFO L225 Difference]: With dead ends: 53184 [2021-08-21 12:56:01,260 INFO L226 Difference]: Without dead ends: 52714 [2021-08-21 12:56:01,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9667 ImplicationChecksByTransitivity, 5218.6ms TimeCoverageRelationStatistics Valid=4304, Invalid=22756, Unknown=0, NotChecked=0, Total=27060 [2021-08-21 12:56:01,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52714 states. [2021-08-21 12:56:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52714 to 36882. [2021-08-21 12:56:01,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36882 states, 36881 states have (on average 2.600173531086467) internal successors, (95897), 36881 states have internal predecessors, (95897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:02,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36882 states to 36882 states and 95897 transitions. [2021-08-21 12:56:02,070 INFO L78 Accepts]: Start accepts. Automaton has 36882 states and 95897 transitions. Word has length 43 [2021-08-21 12:56:02,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:02,070 INFO L470 AbstractCegarLoop]: Abstraction has 36882 states and 95897 transitions. [2021-08-21 12:56:02,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:02,071 INFO L276 IsEmpty]: Start isEmpty. Operand 36882 states and 95897 transitions. [2021-08-21 12:56:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:56:02,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:02,122 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:02,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:02,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-21 12:56:02,337 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:02,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:02,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1378696303, now seen corresponding path program 64 times [2021-08-21 12:56:02,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:02,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804280965] [2021-08-21 12:56:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:02,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:02,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:02,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804280965] [2021-08-21 12:56:02,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804280965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:02,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803731115] [2021-08-21 12:56:02,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:56:02,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:02,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:02,706 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:02,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 12:56:06,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:56:06,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:06,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:56:06,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:07,465 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 12:56:07,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 12:56:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:07,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803731115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:07,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:07,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-21 12:56:07,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023619971] [2021-08-21 12:56:07,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:56:07,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:07,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:56:07,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:56:07,555 INFO L87 Difference]: Start difference. First operand 36882 states and 95897 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:13,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:13,117 INFO L93 Difference]: Finished difference Result 52512 states and 136040 transitions. [2021-08-21 12:56:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-08-21 12:56:13,117 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:56:13,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:13,223 INFO L225 Difference]: With dead ends: 52512 [2021-08-21 12:56:13,223 INFO L226 Difference]: Without dead ends: 51600 [2021-08-21 12:56:13,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7705 ImplicationChecksByTransitivity, 4761.9ms TimeCoverageRelationStatistics Valid=3493, Invalid=19157, Unknown=0, NotChecked=0, Total=22650 [2021-08-21 12:56:13,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51600 states. [2021-08-21 12:56:13,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51600 to 37484. [2021-08-21 12:56:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37484 states, 37483 states have (on average 2.595603340180882) internal successors, (97291), 37483 states have internal predecessors, (97291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:13,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37484 states to 37484 states and 97291 transitions. [2021-08-21 12:56:13,977 INFO L78 Accepts]: Start accepts. Automaton has 37484 states and 97291 transitions. Word has length 43 [2021-08-21 12:56:13,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:13,977 INFO L470 AbstractCegarLoop]: Abstraction has 37484 states and 97291 transitions. [2021-08-21 12:56:13,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 37484 states and 97291 transitions. [2021-08-21 12:56:14,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:56:14,032 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:14,032 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:14,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:14,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:14,233 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:56:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:14,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1631198879, now seen corresponding path program 65 times [2021-08-21 12:56:14,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:14,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136258584] [2021-08-21 12:56:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:14,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:14,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:14,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136258584] [2021-08-21 12:56:14,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136258584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:14,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206521429] [2021-08-21 12:56:14,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:56:14,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:14,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:14,910 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:56:14,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 12:56:18,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:56:18,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:18,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:56:18,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:23,287 INFO L354 Elim1Store]: treesize reduction 159, result has 5.9 percent of original size [2021-08-21 12:56:23,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 66 [2021-08-21 12:56:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:23,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206521429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:23,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:23,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-21 12:56:23,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39689367] [2021-08-21 12:56:23,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:56:23,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:23,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:56:23,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:56:23,385 INFO L87 Difference]: Start difference. First operand 37484 states and 97291 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:55,030 WARN L224 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-08-21 12:56:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-21 12:56:55,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-08-21 12:56:55,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:55,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 12:56:55,231 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:235) ... 49 more [2021-08-21 12:56:55,233 INFO L168 Benchmark]: Toolchain (without parser) took 597405.15 ms. Allocated memory was 194.0 MB in the beginning and 3.1 GB in the end (delta: 2.9 GB). Free memory was 175.3 MB in the beginning and 880.5 MB in the end (delta: -705.2 MB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. [2021-08-21 12:56:55,233 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 194.0 MB. Free memory was 176.4 MB in the beginning and 176.4 MB in the end (delta: 68.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:56:55,233 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.57 ms. Allocated memory is still 194.0 MB. Free memory was 175.2 MB in the beginning and 173.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:56:55,234 INFO L168 Benchmark]: Boogie Preprocessor took 14.00 ms. Allocated memory is still 194.0 MB. Free memory was 173.7 MB in the beginning and 172.8 MB in the end (delta: 874.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:56:55,234 INFO L168 Benchmark]: RCFGBuilder took 195.88 ms. Allocated memory is still 194.0 MB. Free memory was 172.7 MB in the beginning and 160.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-21 12:56:55,234 INFO L168 Benchmark]: TraceAbstraction took 597169.73 ms. Allocated memory was 194.0 MB in the beginning and 3.1 GB in the end (delta: 2.9 GB). Free memory was 159.6 MB in the beginning and 880.5 MB in the end (delta: -720.9 MB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. [2021-08-21 12:56:55,234 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 194.0 MB. Free memory was 176.4 MB in the beginning and 176.4 MB in the end (delta: 68.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.57 ms. Allocated memory is still 194.0 MB. Free memory was 175.2 MB in the beginning and 173.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.00 ms. Allocated memory is still 194.0 MB. Free memory was 173.7 MB in the beginning and 172.8 MB in the end (delta: 874.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 195.88 ms. Allocated memory is still 194.0 MB. Free memory was 172.7 MB in the beginning and 160.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 597169.73 ms. Allocated memory was 194.0 MB in the beginning and 3.1 GB in the end (delta: 2.9 GB). Free memory was 159.6 MB in the beginning and 880.5 MB in the end (delta: -720.9 MB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...