/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/min-max-dec.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:43:55,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:43:55,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:43:55,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:43:55,740 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 12:43:55,761 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:43:55,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:43:55,761 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:43:55,761 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:43:55,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:43:55,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:43:55,762 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:43:55,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:43:55,763 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:43:55,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:43:55,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:43:55,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:43:55,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:43:55,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:43:55,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:43:55,763 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:43:55,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:43:55,764 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:43:55,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:43:55,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:43:55,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:43:55,764 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:43:55,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:43:55,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:43:55,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:43:55,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:43:55,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:43:55,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:43:55,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:43:55,765 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:43:55,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:43:55,765 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:43:55,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:43:56,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:43:56,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:43:56,012 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:43:56,014 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:43:56,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-dec.wvr.bpl [2021-08-21 12:43:56,015 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-dec.wvr.bpl' [2021-08-21 12:43:56,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:43:56,381 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:43:56,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:43:56,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:43:56,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:43:56,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:56" (1/1) ... [2021-08-21 12:43:56,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:56" (1/1) ... [2021-08-21 12:43:56,402 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:43:56,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:43:56,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:43:56,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:43:56,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:56" (1/1) ... [2021-08-21 12:43:56,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:56" (1/1) ... [2021-08-21 12:43:56,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:56" (1/1) ... [2021-08-21 12:43:56,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:56" (1/1) ... [2021-08-21 12:43:56,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:56" (1/1) ... [2021-08-21 12:43:56,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:56" (1/1) ... [2021-08-21 12:43:56,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:56" (1/1) ... [2021-08-21 12:43:56,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:43:56,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:43:56,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:43:56,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:43:56,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:56" (1/1) ... [2021-08-21 12:43:56,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:43:56,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:56,438 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 12:43:56,445 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 12:43:56,468 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:43:56,468 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:43:56,468 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:43:56,469 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:43:56,469 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:43:56,469 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:43:56,470 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:43:56,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:43:56,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:43:56,470 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:43:56,471 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:43:56,471 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:43:56,472 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 12:43:56,472 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 12:43:56,472 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 12:43:56,473 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 12:43:56,695 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:43:56,695 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:43:56,697 INFO L202 PluginConnector]: Adding new model min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:43:56 BoogieIcfgContainer [2021-08-21 12:43:56,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:43:56,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:43:56,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:43:56,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:43:56,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:43:56" (1/2) ... [2021-08-21 12:43:56,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35dff80 and model type min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:43:56, skipping insertion in model container [2021-08-21 12:43:56,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:43:56" (2/2) ... [2021-08-21 12:43:56,701 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-dec.wvr.bpl [2021-08-21 12:43:56,704 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:43:56,704 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:43:56,705 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:43:56,705 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:43:56,734 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-21 12:43:56,759 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:43:56,763 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 12:43:56,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-21 12:43:56,770 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 35 transitions, 102 flow [2021-08-21 12:43:56,860 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 710 states, 709 states have (on average 3.6473906911142455) internal successors, (2586), 709 states have internal predecessors, (2586), 0 states have call successors, (0), 0 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 12:43:56,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 710 states, 709 states have (on average 3.6473906911142455) internal successors, (2586), 709 states have internal predecessors, (2586), 0 states have call successors, (0), 0 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 12:43:56,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:43:56,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:56,888 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] [2021-08-21 12:43:56,888 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:43:56,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:56,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1693976829, now seen corresponding path program 1 times [2021-08-21 12:43:56,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:56,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750673928] [2021-08-21 12:43:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:56,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:57,002 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 12:43:57,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:57,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750673928] [2021-08-21 12:43:57,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750673928] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:43:57,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:43:57,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:43:57,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988445369] [2021-08-21 12:43:57,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:43:57,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:57,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:43:57,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:43:57,022 INFO L87 Difference]: Start difference. First operand has 710 states, 709 states have (on average 3.6473906911142455) internal successors, (2586), 709 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:57,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:57,089 INFO L93 Difference]: Finished difference Result 961 states and 3450 transitions. [2021-08-21 12:43:57,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:43:57,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:43:57,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:57,110 INFO L225 Difference]: With dead ends: 961 [2021-08-21 12:43:57,110 INFO L226 Difference]: Without dead ends: 614 [2021-08-21 12:43:57,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:43:57,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-08-21 12:43:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-08-21 12:43:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.592169657422512) internal successors, (2202), 613 states have internal predecessors, (2202), 0 states have call successors, (0), 0 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 12:43:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2202 transitions. [2021-08-21 12:43:57,178 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2202 transitions. Word has length 23 [2021-08-21 12:43:57,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:57,179 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 2202 transitions. [2021-08-21 12:43:57,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:57,179 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2202 transitions. [2021-08-21 12:43:57,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:43:57,188 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:57,188 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] [2021-08-21 12:43:57,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:43:57,188 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:43:57,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:57,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1387371365, now seen corresponding path program 2 times [2021-08-21 12:43:57,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:57,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313140297] [2021-08-21 12:43:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:57,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:57,256 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 12:43:57,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:57,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313140297] [2021-08-21 12:43:57,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313140297] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:43:57,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:43:57,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:43:57,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823857641] [2021-08-21 12:43:57,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:43:57,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:57,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:43:57,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:43:57,259 INFO L87 Difference]: Start difference. First operand 614 states and 2202 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:57,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:57,385 INFO L93 Difference]: Finished difference Result 2435 states and 8733 transitions. [2021-08-21 12:43:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:43:57,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:43:57,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:57,397 INFO L225 Difference]: With dead ends: 2435 [2021-08-21 12:43:57,397 INFO L226 Difference]: Without dead ends: 1497 [2021-08-21 12:43:57,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:43:57,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-08-21 12:43:57,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 859. [2021-08-21 12:43:57,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.5442890442890445) internal successors, (3041), 858 states have internal predecessors, (3041), 0 states have call successors, (0), 0 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 12:43:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 3041 transitions. [2021-08-21 12:43:57,443 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 3041 transitions. Word has length 23 [2021-08-21 12:43:57,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:57,444 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 3041 transitions. [2021-08-21 12:43:57,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:57,444 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 3041 transitions. [2021-08-21 12:43:57,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:43:57,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:57,448 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] [2021-08-21 12:43:57,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:43:57,448 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:43:57,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:57,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1797120999, now seen corresponding path program 3 times [2021-08-21 12:43:57,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:57,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658292040] [2021-08-21 12:43:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:57,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:57,503 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 12:43:57,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:57,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658292040] [2021-08-21 12:43:57,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658292040] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:43:57,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:43:57,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:43:57,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467312794] [2021-08-21 12:43:57,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:43:57,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:57,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:43:57,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:43:57,505 INFO L87 Difference]: Start difference. First operand 859 states and 3041 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:57,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:57,621 INFO L93 Difference]: Finished difference Result 3289 states and 11673 transitions. [2021-08-21 12:43:57,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:43:57,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:43:57,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:57,636 INFO L225 Difference]: With dead ends: 3289 [2021-08-21 12:43:57,640 INFO L226 Difference]: Without dead ends: 2391 [2021-08-21 12:43:57,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:43:57,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-08-21 12:43:57,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 910. [2021-08-21 12:43:57,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.553355335533553) internal successors, (3230), 909 states have internal predecessors, (3230), 0 states have call successors, (0), 0 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 12:43:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3230 transitions. [2021-08-21 12:43:57,671 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3230 transitions. Word has length 23 [2021-08-21 12:43:57,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:57,671 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 3230 transitions. [2021-08-21 12:43:57,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3230 transitions. [2021-08-21 12:43:57,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:43:57,673 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:57,673 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] [2021-08-21 12:43:57,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:43:57,674 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:43:57,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:57,674 INFO L82 PathProgramCache]: Analyzing trace with hash 61402933, now seen corresponding path program 4 times [2021-08-21 12:43:57,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:57,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597882158] [2021-08-21 12:43:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:57,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:57,698 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 12:43:57,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:57,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597882158] [2021-08-21 12:43:57,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597882158] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:43:57,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:43:57,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:43:57,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174309667] [2021-08-21 12:43:57,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:43:57,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:57,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:43:57,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:43:57,700 INFO L87 Difference]: Start difference. First operand 910 states and 3230 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:57,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:57,717 INFO L93 Difference]: Finished difference Result 1081 states and 3814 transitions. [2021-08-21 12:43:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:43:57,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:43:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:57,722 INFO L225 Difference]: With dead ends: 1081 [2021-08-21 12:43:57,722 INFO L226 Difference]: Without dead ends: 830 [2021-08-21 12:43:57,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:43:57,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-08-21 12:43:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 830. [2021-08-21 12:43:57,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4861278648974667) internal successors, (2890), 829 states have internal predecessors, (2890), 0 states have call successors, (0), 0 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 12:43:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2890 transitions. [2021-08-21 12:43:57,741 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2890 transitions. Word has length 23 [2021-08-21 12:43:57,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:57,741 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2890 transitions. [2021-08-21 12:43:57,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:57,742 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2890 transitions. [2021-08-21 12:43:57,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:43:57,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:57,744 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 12:43:57,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 12:43:57,744 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:43:57,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:57,745 INFO L82 PathProgramCache]: Analyzing trace with hash -432116485, now seen corresponding path program 1 times [2021-08-21 12:43:57,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:57,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080788822] [2021-08-21 12:43:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:57,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:57,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:57,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080788822] [2021-08-21 12:43:57,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080788822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:57,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068929903] [2021-08-21 12:43:57,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:57,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:57,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:57,813 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 12:43:57,860 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 12:43:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:57,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:43:57,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:58,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068929903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:58,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:43:58,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 12:43:58,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694962707] [2021-08-21 12:43:58,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:43:58,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:58,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:43:58,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:43:58,032 INFO L87 Difference]: Start difference. First operand 830 states and 2890 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) 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 12:43:58,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:58,085 INFO L93 Difference]: Finished difference Result 1914 states and 6600 transitions. [2021-08-21 12:43:58,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:43:58,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) 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 25 [2021-08-21 12:43:58,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:58,095 INFO L225 Difference]: With dead ends: 1914 [2021-08-21 12:43:58,095 INFO L226 Difference]: Without dead ends: 1914 [2021-08-21 12:43:58,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:43:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-08-21 12:43:58,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1087. [2021-08-21 12:43:58,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.603130755064457) internal successors, (3913), 1086 states have internal predecessors, (3913), 0 states have call successors, (0), 0 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 12:43:58,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3913 transitions. [2021-08-21 12:43:58,126 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3913 transitions. Word has length 25 [2021-08-21 12:43:58,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:58,127 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 3913 transitions. [2021-08-21 12:43:58,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) 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 12:43:58,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3913 transitions. [2021-08-21 12:43:58,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:43:58,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:58,130 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 12:43:58,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 12:43:58,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:58,345 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:43:58,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:58,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1214414653, now seen corresponding path program 1 times [2021-08-21 12:43:58,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:58,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827299017] [2021-08-21 12:43:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:58,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:58,366 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 12:43:58,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:58,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827299017] [2021-08-21 12:43:58,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827299017] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:43:58,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:43:58,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:43:58,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766991464] [2021-08-21 12:43:58,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:43:58,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:58,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:43:58,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:43:58,368 INFO L87 Difference]: Start difference. First operand 1087 states and 3913 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:58,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:58,402 INFO L93 Difference]: Finished difference Result 1486 states and 5095 transitions. [2021-08-21 12:43:58,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:43:58,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:43:58,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:58,410 INFO L225 Difference]: With dead ends: 1486 [2021-08-21 12:43:58,410 INFO L226 Difference]: Without dead ends: 1456 [2021-08-21 12:43:58,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:43:58,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-08-21 12:43:58,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1266. [2021-08-21 12:43:58,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.5177865612648223) internal successors, (4450), 1265 states have internal predecessors, (4450), 0 states have call successors, (0), 0 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 12:43:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4450 transitions. [2021-08-21 12:43:58,444 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4450 transitions. Word has length 25 [2021-08-21 12:43:58,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:58,444 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 4450 transitions. [2021-08-21 12:43:58,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4450 transitions. [2021-08-21 12:43:58,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:43:58,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:58,448 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 12:43:58,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 12:43:58,448 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:43:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:58,448 INFO L82 PathProgramCache]: Analyzing trace with hash -831286723, now seen corresponding path program 1 times [2021-08-21 12:43:58,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:58,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497386931] [2021-08-21 12:43:58,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:58,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:58,485 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 12:43:58,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:58,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497386931] [2021-08-21 12:43:58,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497386931] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:43:58,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:43:58,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:43:58,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574459804] [2021-08-21 12:43:58,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:43:58,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:58,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:43:58,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:43:58,487 INFO L87 Difference]: Start difference. First operand 1266 states and 4450 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:58,546 INFO L93 Difference]: Finished difference Result 1470 states and 4972 transitions. [2021-08-21 12:43:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:43:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:43:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:58,553 INFO L225 Difference]: With dead ends: 1470 [2021-08-21 12:43:58,553 INFO L226 Difference]: Without dead ends: 1307 [2021-08-21 12:43:58,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:43:58,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-08-21 12:43:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1247. [2021-08-21 12:43:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 3.4935794542536116) internal successors, (4353), 1246 states have internal predecessors, (4353), 0 states have call successors, (0), 0 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 12:43:58,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 4353 transitions. [2021-08-21 12:43:58,599 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 4353 transitions. Word has length 25 [2021-08-21 12:43:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:58,600 INFO L470 AbstractCegarLoop]: Abstraction has 1247 states and 4353 transitions. [2021-08-21 12:43:58,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:58,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 4353 transitions. [2021-08-21 12:43:58,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:43:58,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:58,603 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 12:43:58,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 12:43:58,604 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:43:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:58,604 INFO L82 PathProgramCache]: Analyzing trace with hash -707926211, now seen corresponding path program 2 times [2021-08-21 12:43:58,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:58,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699162158] [2021-08-21 12:43:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:58,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:58,660 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 12:43:58,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:58,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699162158] [2021-08-21 12:43:58,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699162158] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:43:58,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:43:58,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:43:58,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123018676] [2021-08-21 12:43:58,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:43:58,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:58,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:43:58,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:43:58,662 INFO L87 Difference]: Start difference. First operand 1247 states and 4353 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:58,695 INFO L93 Difference]: Finished difference Result 1418 states and 4897 transitions. [2021-08-21 12:43:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:43:58,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:43:58,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:58,702 INFO L225 Difference]: With dead ends: 1418 [2021-08-21 12:43:58,702 INFO L226 Difference]: Without dead ends: 1418 [2021-08-21 12:43:58,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:43:58,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-08-21 12:43:58,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1232. [2021-08-21 12:43:58,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 3.505280259951259) internal successors, (4315), 1231 states have internal predecessors, (4315), 0 states have call successors, (0), 0 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 12:43:58,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 4315 transitions. [2021-08-21 12:43:58,727 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 4315 transitions. Word has length 25 [2021-08-21 12:43:58,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:58,727 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 4315 transitions. [2021-08-21 12:43:58,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:43:58,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 4315 transitions. [2021-08-21 12:43:58,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:43:58,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:58,730 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 12:43:58,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 12:43:58,730 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:43:58,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:58,730 INFO L82 PathProgramCache]: Analyzing trace with hash 823736187, now seen corresponding path program 2 times [2021-08-21 12:43:58,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:58,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798698417] [2021-08-21 12:43:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:58,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:58,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:58,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798698417] [2021-08-21 12:43:58,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798698417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:58,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882615696] [2021-08-21 12:43:58,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:43:58,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:58,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:58,761 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 12:43:58,761 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 12:43:58,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:43:58,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:43:58,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:43:58,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:58,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882615696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:58,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:43:58,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 12:43:58,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000222748] [2021-08-21 12:43:58,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:43:58,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:58,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:43:58,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:43:58,905 INFO L87 Difference]: Start difference. First operand 1232 states and 4315 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 12:43:58,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:58,952 INFO L93 Difference]: Finished difference Result 1482 states and 5191 transitions. [2021-08-21 12:43:58,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:43:58,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 12:43:58,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:58,959 INFO L225 Difference]: With dead ends: 1482 [2021-08-21 12:43:58,959 INFO L226 Difference]: Without dead ends: 1380 [2021-08-21 12:43:58,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:43:58,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-08-21 12:43:58,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1105. [2021-08-21 12:43:58,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 3.5543478260869565) internal successors, (3924), 1104 states have internal predecessors, (3924), 0 states have call successors, (0), 0 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 12:43:58,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 3924 transitions. [2021-08-21 12:43:58,984 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 3924 transitions. Word has length 25 [2021-08-21 12:43:58,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:58,985 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 3924 transitions. [2021-08-21 12:43:58,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 12:43:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 3924 transitions. [2021-08-21 12:43:58,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:43:58,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:58,987 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, 1, 1] [2021-08-21 12:43:59,006 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 12:43:59,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-21 12:43:59,201 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:43:59,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:59,201 INFO L82 PathProgramCache]: Analyzing trace with hash 91352989, now seen corresponding path program 1 times [2021-08-21 12:43:59,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:59,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406991433] [2021-08-21 12:43:59,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:59,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:59,246 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 12:43:59,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:59,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406991433] [2021-08-21 12:43:59,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406991433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:59,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353668182] [2021-08-21 12:43:59,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:59,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:59,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:59,247 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 12:43:59,248 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 12:43:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:59,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:43:59,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:43:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:43:59,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353668182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:59,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:43:59,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-08-21 12:43:59,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750427673] [2021-08-21 12:43:59,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:43:59,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:43:59,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:43:59,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:43:59,385 INFO L87 Difference]: Start difference. First operand 1105 states and 3924 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) 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 12:43:59,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:43:59,443 INFO L93 Difference]: Finished difference Result 1282 states and 4578 transitions. [2021-08-21 12:43:59,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:43:59,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) 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 27 [2021-08-21 12:43:59,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:43:59,461 INFO L225 Difference]: With dead ends: 1282 [2021-08-21 12:43:59,461 INFO L226 Difference]: Without dead ends: 1282 [2021-08-21 12:43:59,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:43:59,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-08-21 12:43:59,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1044. [2021-08-21 12:43:59,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.5618408437200384) internal successors, (3715), 1043 states have internal predecessors, (3715), 0 states have call successors, (0), 0 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 12:43:59,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3715 transitions. [2021-08-21 12:43:59,483 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3715 transitions. Word has length 27 [2021-08-21 12:43:59,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:43:59,483 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 3715 transitions. [2021-08-21 12:43:59,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) 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 12:43:59,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3715 transitions. [2021-08-21 12:43:59,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:43:59,487 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:43:59,487 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, 1, 1, 1, 1] [2021-08-21 12:43:59,506 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 12:43:59,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:59,702 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:43:59,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:43:59,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1411357505, now seen corresponding path program 1 times [2021-08-21 12:43:59,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:43:59,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150402231] [2021-08-21 12:43:59,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:59,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:43:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:43:59,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:43:59,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150402231] [2021-08-21 12:43:59,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150402231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:43:59,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169301833] [2021-08-21 12:43:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:43:59,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:43:59,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:43:59,835 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 12:43:59,836 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 12:43:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:43:59,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:43:59,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:00,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-08-21 12:44:00,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 12:44:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:00,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169301833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:00,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:00,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 12:44:00,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849554321] [2021-08-21 12:44:00,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:44:00,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:00,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:44:00,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:44:00,211 INFO L87 Difference]: Start difference. First operand 1044 states and 3715 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 12:44:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:00,417 INFO L93 Difference]: Finished difference Result 2477 states and 8903 transitions. [2021-08-21 12:44:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:44:00,417 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:44:00,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:00,423 INFO L225 Difference]: With dead ends: 2477 [2021-08-21 12:44:00,424 INFO L226 Difference]: Without dead ends: 1549 [2021-08-21 12:44:00,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:44:00,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2021-08-21 12:44:00,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 1288. [2021-08-21 12:44:00,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.5283605283605284) internal successors, (4541), 1287 states have internal predecessors, (4541), 0 states have call successors, (0), 0 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 12:44:00,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4541 transitions. [2021-08-21 12:44:00,449 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4541 transitions. Word has length 29 [2021-08-21 12:44:00,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:00,449 INFO L470 AbstractCegarLoop]: Abstraction has 1288 states and 4541 transitions. [2021-08-21 12:44:00,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 12:44:00,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4541 transitions. [2021-08-21 12:44:00,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:44:00,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:00,452 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, 1, 1, 1, 1] [2021-08-21 12:44:00,473 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 12:44:00,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:00,673 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:00,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:00,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1025152845, now seen corresponding path program 2 times [2021-08-21 12:44:00,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:00,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416971142] [2021-08-21 12:44:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:00,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:00,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:00,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416971142] [2021-08-21 12:44:00,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416971142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:00,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341779866] [2021-08-21 12:44:00,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:44:00,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:00,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:00,791 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 12:44:00,807 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 12:44:00,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:44:00,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:00,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:44:00,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:01,051 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 12:44:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:01,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341779866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:01,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:01,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:44:01,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616877578] [2021-08-21 12:44:01,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:44:01,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:01,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:44:01,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:44:01,086 INFO L87 Difference]: Start difference. First operand 1288 states and 4541 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:01,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:01,339 INFO L93 Difference]: Finished difference Result 3395 states and 12093 transitions. [2021-08-21 12:44:01,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:44:01,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:44:01,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:01,344 INFO L225 Difference]: With dead ends: 3395 [2021-08-21 12:44:01,344 INFO L226 Difference]: Without dead ends: 1756 [2021-08-21 12:44:01,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:44:01,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-08-21 12:44:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1019. [2021-08-21 12:44:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.486247544204322) internal successors, (3549), 1018 states have internal predecessors, (3549), 0 states have call successors, (0), 0 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 12:44:01,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3549 transitions. [2021-08-21 12:44:01,367 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3549 transitions. Word has length 29 [2021-08-21 12:44:01,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:01,368 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 3549 transitions. [2021-08-21 12:44:01,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:01,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3549 transitions. [2021-08-21 12:44:01,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:44:01,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:01,370 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, 1, 1, 1, 1] [2021-08-21 12:44:01,389 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 12:44:01,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-21 12:44:01,589 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:01,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:01,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1636464349, now seen corresponding path program 3 times [2021-08-21 12:44:01,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:01,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720482467] [2021-08-21 12:44:01,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:01,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:01,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:01,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720482467] [2021-08-21 12:44:01,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720482467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:01,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053805096] [2021-08-21 12:44:01,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:44:01,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:01,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:01,670 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 12:44:01,704 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 12:44:01,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:44:01,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:01,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:44:01,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:01,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 10 treesize of output 7 [2021-08-21 12:44:01,980 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 12:44:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:02,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053805096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:02,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:02,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 12:44:02,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923421388] [2021-08-21 12:44:02,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:44:02,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:02,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:44:02,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:44:02,012 INFO L87 Difference]: Start difference. First operand 1019 states and 3549 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:02,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:02,189 INFO L93 Difference]: Finished difference Result 2225 states and 7823 transitions. [2021-08-21 12:44:02,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:44:02,190 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:44:02,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:02,195 INFO L225 Difference]: With dead ends: 2225 [2021-08-21 12:44:02,195 INFO L226 Difference]: Without dead ends: 1056 [2021-08-21 12:44:02,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:44:02,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-08-21 12:44:02,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 730. [2021-08-21 12:44:02,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.486968449931413) internal successors, (2542), 729 states have internal predecessors, (2542), 0 states have call successors, (0), 0 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 12:44:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2542 transitions. [2021-08-21 12:44:02,214 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2542 transitions. Word has length 29 [2021-08-21 12:44:02,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:02,215 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 2542 transitions. [2021-08-21 12:44:02,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:02,215 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2542 transitions. [2021-08-21 12:44:02,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:44:02,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:02,217 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, 1, 1, 1, 1] [2021-08-21 12:44:02,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-21 12:44:02,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:02,433 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:02,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:02,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1799702907, now seen corresponding path program 4 times [2021-08-21 12:44:02,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:02,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286006510] [2021-08-21 12:44:02,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:02,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:02,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:02,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286006510] [2021-08-21 12:44:02,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286006510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:02,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763842822] [2021-08-21 12:44:02,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:44:02,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:02,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:02,561 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 12:44:02,576 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 12:44:02,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:44:02,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:02,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:44:02,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:02,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-08-21 12:44:02,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 12:44:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:02,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763842822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:02,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:02,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 12:44:02,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286704040] [2021-08-21 12:44:02,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:44:02,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:02,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:44:02,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:44:02,918 INFO L87 Difference]: Start difference. First operand 730 states and 2542 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:03,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:03,033 INFO L93 Difference]: Finished difference Result 1734 states and 6084 transitions. [2021-08-21 12:44:03,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:44:03,033 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:44:03,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:03,036 INFO L225 Difference]: With dead ends: 1734 [2021-08-21 12:44:03,036 INFO L226 Difference]: Without dead ends: 812 [2021-08-21 12:44:03,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:44:03,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-08-21 12:44:03,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 764. [2021-08-21 12:44:03,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.4416775884665793) internal successors, (2626), 763 states have internal predecessors, (2626), 0 states have call successors, (0), 0 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 12:44:03,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2626 transitions. [2021-08-21 12:44:03,048 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2626 transitions. Word has length 29 [2021-08-21 12:44:03,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:03,049 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 2626 transitions. [2021-08-21 12:44:03,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:03,049 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2626 transitions. [2021-08-21 12:44:03,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:44:03,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:03,050 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:03,071 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 12:44:03,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:03,267 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:03,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:03,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1649134439, now seen corresponding path program 5 times [2021-08-21 12:44:03,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:03,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279366159] [2021-08-21 12:44:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:03,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:44:03,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:03,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279366159] [2021-08-21 12:44:03,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279366159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:03,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025693713] [2021-08-21 12:44:03,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:44:03,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:03,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:03,307 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 12:44:03,337 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 12:44:03,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:44:03,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:03,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:44:03,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:44:03,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025693713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:03,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:03,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:44:03,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425104555] [2021-08-21 12:44:03,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:44:03,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:03,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:44:03,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:44:03,550 INFO L87 Difference]: Start difference. First operand 764 states and 2626 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 12:44:03,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:03,624 INFO L93 Difference]: Finished difference Result 2158 states and 7467 transitions. [2021-08-21 12:44:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:44:03,633 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 12:44:03,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:03,639 INFO L225 Difference]: With dead ends: 2158 [2021-08-21 12:44:03,639 INFO L226 Difference]: Without dead ends: 2158 [2021-08-21 12:44:03,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:44:03,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-08-21 12:44:03,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1150. [2021-08-21 12:44:03,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.6257615317667535) internal successors, (4166), 1149 states have internal predecessors, (4166), 0 states have call successors, (0), 0 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 12:44:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 4166 transitions. [2021-08-21 12:44:03,665 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 4166 transitions. Word has length 31 [2021-08-21 12:44:03,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:03,666 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 4166 transitions. [2021-08-21 12:44:03,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 12:44:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 4166 transitions. [2021-08-21 12:44:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:44:03,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:03,668 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:03,687 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 12:44:03,884 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,SelfDestructingSolverStorable14 [2021-08-21 12:44:03,884 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:03,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:03,885 INFO L82 PathProgramCache]: Analyzing trace with hash -427643531, now seen corresponding path program 6 times [2021-08-21 12:44:03,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:03,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319582101] [2021-08-21 12:44:03,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:03,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:44:03,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:03,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319582101] [2021-08-21 12:44:03,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319582101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:03,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953681340] [2021-08-21 12:44:03,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:44:03,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:03,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:03,912 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 12:44:03,932 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 12:44:04,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:44:04,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:04,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:44:04,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:44:04,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953681340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:04,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:04,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 12:44:04,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207837768] [2021-08-21 12:44:04,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:44:04,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:04,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:44:04,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:44:04,183 INFO L87 Difference]: Start difference. First operand 1150 states and 4166 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:04,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:04,615 INFO L93 Difference]: Finished difference Result 3097 states and 11097 transitions. [2021-08-21 12:44:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:44:04,616 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:44:04,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:04,624 INFO L225 Difference]: With dead ends: 3097 [2021-08-21 12:44:04,624 INFO L226 Difference]: Without dead ends: 3092 [2021-08-21 12:44:04,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:44:04,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3092 states. [2021-08-21 12:44:04,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3092 to 1871. [2021-08-21 12:44:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.8058823529411763) internal successors, (7117), 1870 states have internal predecessors, (7117), 0 states have call successors, (0), 0 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 12:44:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 7117 transitions. [2021-08-21 12:44:04,666 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 7117 transitions. Word has length 31 [2021-08-21 12:44:04,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:04,666 INFO L470 AbstractCegarLoop]: Abstraction has 1871 states and 7117 transitions. [2021-08-21 12:44:04,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:04,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 7117 transitions. [2021-08-21 12:44:04,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:44:04,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:04,670 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:04,688 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 12:44:04,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 12:44:04,884 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:04,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:04,884 INFO L82 PathProgramCache]: Analyzing trace with hash -11082495, now seen corresponding path program 7 times [2021-08-21 12:44:04,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:04,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750289070] [2021-08-21 12:44:04,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:04,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:44:04,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:04,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750289070] [2021-08-21 12:44:04,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750289070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:04,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878627514] [2021-08-21 12:44:04,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:44:04,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:04,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:04,913 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 12:44:04,922 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 12:44:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:05,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:44:05,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:44:05,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878627514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:05,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:05,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:44:05,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222945293] [2021-08-21 12:44:05,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:44:05,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:05,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:44:05,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:44:05,183 INFO L87 Difference]: Start difference. First operand 1871 states and 7117 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 12:44:05,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:05,259 INFO L93 Difference]: Finished difference Result 3521 states and 13072 transitions. [2021-08-21 12:44:05,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:44:05,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 33 [2021-08-21 12:44:05,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:05,269 INFO L225 Difference]: With dead ends: 3521 [2021-08-21 12:44:05,269 INFO L226 Difference]: Without dead ends: 3502 [2021-08-21 12:44:05,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:44:05,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2021-08-21 12:44:05,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 2458. [2021-08-21 12:44:05,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2458 states, 2457 states have (on average 3.938949938949939) internal successors, (9678), 2457 states have internal predecessors, (9678), 0 states have call successors, (0), 0 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 12:44:05,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 9678 transitions. [2021-08-21 12:44:05,322 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 9678 transitions. Word has length 33 [2021-08-21 12:44:05,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:05,322 INFO L470 AbstractCegarLoop]: Abstraction has 2458 states and 9678 transitions. [2021-08-21 12:44:05,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 12:44:05,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 9678 transitions. [2021-08-21 12:44:05,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:44:05,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:05,327 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:05,346 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 12:44:05,533 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,SelfDestructingSolverStorable16 [2021-08-21 12:44:05,534 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:05,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:05,534 INFO L82 PathProgramCache]: Analyzing trace with hash -704424507, now seen corresponding path program 8 times [2021-08-21 12:44:05,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:05,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267333832] [2021-08-21 12:44:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:05,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:05,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:44:05,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:05,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267333832] [2021-08-21 12:44:05,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267333832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:05,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549723963] [2021-08-21 12:44:05,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:44:05,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:05,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:05,560 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 12:44:05,562 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 12:44:05,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:44:05,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:05,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:44:05,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:44:05,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549723963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:05,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:05,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:44:05,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792082269] [2021-08-21 12:44:05,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:44:05,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:05,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:44:05,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:44:05,840 INFO L87 Difference]: Start difference. First operand 2458 states and 9678 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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 12:44:05,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:05,901 INFO L93 Difference]: Finished difference Result 3425 states and 12799 transitions. [2021-08-21 12:44:05,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:44:05,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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 33 [2021-08-21 12:44:05,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:05,911 INFO L225 Difference]: With dead ends: 3425 [2021-08-21 12:44:05,912 INFO L226 Difference]: Without dead ends: 3425 [2021-08-21 12:44:05,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:44:05,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3425 states. [2021-08-21 12:44:05,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3425 to 2506. [2021-08-21 12:44:05,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2505 states have (on average 3.9405189620758483) internal successors, (9871), 2505 states have internal predecessors, (9871), 0 states have call successors, (0), 0 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 12:44:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 9871 transitions. [2021-08-21 12:44:05,966 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 9871 transitions. Word has length 33 [2021-08-21 12:44:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:05,966 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 9871 transitions. [2021-08-21 12:44:05,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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 12:44:05,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 9871 transitions. [2021-08-21 12:44:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:44:05,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:05,972 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, 1, 1, 1, 1] [2021-08-21 12:44:05,990 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 12:44:06,184 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,SelfDestructingSolverStorable17 [2021-08-21 12:44:06,185 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:06,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:06,185 INFO L82 PathProgramCache]: Analyzing trace with hash -354802269, now seen corresponding path program 9 times [2021-08-21 12:44:06,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:06,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425852205] [2021-08-21 12:44:06,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:06,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:06,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:44:06,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:06,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425852205] [2021-08-21 12:44:06,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425852205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:06,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936970004] [2021-08-21 12:44:06,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:44:06,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:06,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:06,329 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 12:44:06,330 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 12:44:06,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:44:06,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:06,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:44:06,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:06,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-08-21 12:44:06,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 12:44:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:06,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936970004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:06,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:06,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-08-21 12:44:06,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780624095] [2021-08-21 12:44:06,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:44:06,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:06,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:44:06,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:44:06,916 INFO L87 Difference]: Start difference. First operand 2506 states and 9871 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 12:44:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:07,699 INFO L93 Difference]: Finished difference Result 7198 states and 27382 transitions. [2021-08-21 12:44:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:44:07,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:44:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:07,710 INFO L225 Difference]: With dead ends: 7198 [2021-08-21 12:44:07,710 INFO L226 Difference]: Without dead ends: 3813 [2021-08-21 12:44:07,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 398.7ms TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:44:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-08-21 12:44:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 2599. [2021-08-21 12:44:07,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2598 states have (on average 3.8956889915319475) internal successors, (10121), 2598 states have internal predecessors, (10121), 0 states have call successors, (0), 0 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 12:44:07,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 10121 transitions. [2021-08-21 12:44:07,776 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 10121 transitions. Word has length 35 [2021-08-21 12:44:07,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:07,776 INFO L470 AbstractCegarLoop]: Abstraction has 2599 states and 10121 transitions. [2021-08-21 12:44:07,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 12:44:07,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 10121 transitions. [2021-08-21 12:44:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:44:07,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:07,782 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, 1, 1, 1, 1] [2021-08-21 12:44:07,801 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 12:44:08,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:08,001 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:08,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:08,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1618803809, now seen corresponding path program 10 times [2021-08-21 12:44:08,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:08,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591827384] [2021-08-21 12:44:08,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:08,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:44:08,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:08,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591827384] [2021-08-21 12:44:08,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591827384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:08,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043700593] [2021-08-21 12:44:08,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:44:08,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:08,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:08,169 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 12:44:08,200 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 12:44:08,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:44:08,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:08,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:44:08,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:08,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2021-08-21 12:44:08,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-08-21 12:44:08,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 12:44:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:44:08,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043700593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:08,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:08,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 12:44:08,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8238319] [2021-08-21 12:44:08,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:44:08,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:08,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:44:08,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:44:08,729 INFO L87 Difference]: Start difference. First operand 2599 states and 10121 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 12:44:09,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:09,163 INFO L93 Difference]: Finished difference Result 5841 states and 22463 transitions. [2021-08-21 12:44:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:44:09,164 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 35 [2021-08-21 12:44:09,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:09,170 INFO L225 Difference]: With dead ends: 5841 [2021-08-21 12:44:09,170 INFO L226 Difference]: Without dead ends: 2814 [2021-08-21 12:44:09,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 262.9ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:44:09,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-08-21 12:44:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2642. [2021-08-21 12:44:09,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2642 states, 2641 states have (on average 3.865581219235138) internal successors, (10209), 2641 states have internal predecessors, (10209), 0 states have call successors, (0), 0 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 12:44:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 10209 transitions. [2021-08-21 12:44:09,216 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 10209 transitions. Word has length 35 [2021-08-21 12:44:09,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:09,216 INFO L470 AbstractCegarLoop]: Abstraction has 2642 states and 10209 transitions. [2021-08-21 12:44:09,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 12:44:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 10209 transitions. [2021-08-21 12:44:09,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:44:09,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:09,222 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:09,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:44:09,438 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,SelfDestructingSolverStorable19 [2021-08-21 12:44:09,439 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:09,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1720377939, now seen corresponding path program 11 times [2021-08-21 12:44:09,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:09,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008251968] [2021-08-21 12:44:09,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:09,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:44:09,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:09,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008251968] [2021-08-21 12:44:09,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008251968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:09,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016410767] [2021-08-21 12:44:09,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:44:09,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:09,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:09,492 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 12:44:09,493 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 12:44:09,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:44:09,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:09,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:44:09,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:44:09,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016410767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:09,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:09,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 12:44:09,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31364986] [2021-08-21 12:44:09,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:44:09,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:09,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:44:09,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:44:09,845 INFO L87 Difference]: Start difference. First operand 2642 states and 10209 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:09,961 INFO L93 Difference]: Finished difference Result 5727 states and 21564 transitions. [2021-08-21 12:44:09,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:44:09,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:44:09,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:09,973 INFO L225 Difference]: With dead ends: 5727 [2021-08-21 12:44:09,974 INFO L226 Difference]: Without dead ends: 5687 [2021-08-21 12:44:09,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:44:09,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5687 states. [2021-08-21 12:44:10,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5687 to 3542. [2021-08-21 12:44:10,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3542 states, 3541 states have (on average 4.06749505789325) internal successors, (14403), 3541 states have internal predecessors, (14403), 0 states have call successors, (0), 0 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 12:44:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3542 states to 3542 states and 14403 transitions. [2021-08-21 12:44:10,079 INFO L78 Accepts]: Start accepts. Automaton has 3542 states and 14403 transitions. Word has length 37 [2021-08-21 12:44:10,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:10,080 INFO L470 AbstractCegarLoop]: Abstraction has 3542 states and 14403 transitions. [2021-08-21 12:44:10,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:10,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3542 states and 14403 transitions. [2021-08-21 12:44:10,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:44:10,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:10,087 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:10,105 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 12:44:10,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:10,301 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:10,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:10,301 INFO L82 PathProgramCache]: Analyzing trace with hash 742868079, now seen corresponding path program 12 times [2021-08-21 12:44:10,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:10,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760950635] [2021-08-21 12:44:10,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:10,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:44:10,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:10,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760950635] [2021-08-21 12:44:10,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760950635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:10,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647957563] [2021-08-21 12:44:10,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:44:10,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:10,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:10,337 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 12:44:10,339 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 12:44:10,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:44:10,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:10,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:44:10,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:44:10,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647957563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:10,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:10,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 12:44:10,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401587214] [2021-08-21 12:44:10,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:44:10,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:10,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:44:10,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:44:10,673 INFO L87 Difference]: Start difference. First operand 3542 states and 14403 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:10,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:10,759 INFO L93 Difference]: Finished difference Result 5245 states and 20071 transitions. [2021-08-21 12:44:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:44:10,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:44:10,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:10,770 INFO L225 Difference]: With dead ends: 5245 [2021-08-21 12:44:10,770 INFO L226 Difference]: Without dead ends: 5245 [2021-08-21 12:44:10,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:44:10,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5245 states. [2021-08-21 12:44:10,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5245 to 2860. [2021-08-21 12:44:10,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2859 states have (on average 3.9153550192374955) internal successors, (11194), 2859 states have internal predecessors, (11194), 0 states have call successors, (0), 0 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 12:44:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 11194 transitions. [2021-08-21 12:44:10,851 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 11194 transitions. Word has length 37 [2021-08-21 12:44:10,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:10,852 INFO L470 AbstractCegarLoop]: Abstraction has 2860 states and 11194 transitions. [2021-08-21 12:44:10,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:10,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 11194 transitions. [2021-08-21 12:44:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:44:10,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:10,858 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:10,884 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 12:44:11,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:11,065 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:11,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:11,065 INFO L82 PathProgramCache]: Analyzing trace with hash 128791037, now seen corresponding path program 13 times [2021-08-21 12:44:11,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:11,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343660072] [2021-08-21 12:44:11,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:11,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:44:11,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:11,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343660072] [2021-08-21 12:44:11,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343660072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:11,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766340855] [2021-08-21 12:44:11,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:44:11,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:11,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:11,104 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 12:44:11,124 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 12:44:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:11,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:44:11,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:44:11,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766340855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:11,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:11,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 12:44:11,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27311692] [2021-08-21 12:44:11,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:44:11,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:11,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:44:11,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:44:11,484 INFO L87 Difference]: Start difference. First operand 2860 states and 11194 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:11,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:11,605 INFO L93 Difference]: Finished difference Result 4154 states and 15451 transitions. [2021-08-21 12:44:11,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:44:11,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:44:11,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:11,614 INFO L225 Difference]: With dead ends: 4154 [2021-08-21 12:44:11,615 INFO L226 Difference]: Without dead ends: 4154 [2021-08-21 12:44:11,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:44:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2021-08-21 12:44:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 2414. [2021-08-21 12:44:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 3.800248653128885) internal successors, (9170), 2413 states have internal predecessors, (9170), 0 states have call successors, (0), 0 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 12:44:11,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 9170 transitions. [2021-08-21 12:44:11,702 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 9170 transitions. Word has length 37 [2021-08-21 12:44:11,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:11,703 INFO L470 AbstractCegarLoop]: Abstraction has 2414 states and 9170 transitions. [2021-08-21 12:44:11,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:11,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 9170 transitions. [2021-08-21 12:44:11,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:44:11,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:11,708 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:11,724 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 12:44:11,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 12:44:11,911 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:11,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:11,911 INFO L82 PathProgramCache]: Analyzing trace with hash 425585813, now seen corresponding path program 14 times [2021-08-21 12:44:11,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:11,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708634088] [2021-08-21 12:44:11,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:11,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:44:11,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:11,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708634088] [2021-08-21 12:44:11,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708634088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:11,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100961762] [2021-08-21 12:44:11,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:44:11,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:11,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:11,986 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 12:44:11,987 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 12:44:12,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:44:12,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:12,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:44:12,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:44:12,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100961762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:12,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:12,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:44:12,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950225132] [2021-08-21 12:44:12,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:44:12,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:12,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:44:12,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:44:12,384 INFO L87 Difference]: Start difference. First operand 2414 states and 9170 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:12,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:12,591 INFO L93 Difference]: Finished difference Result 6453 states and 23941 transitions. [2021-08-21 12:44:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:44:12,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 12:44:12,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:12,604 INFO L225 Difference]: With dead ends: 6453 [2021-08-21 12:44:12,604 INFO L226 Difference]: Without dead ends: 6453 [2021-08-21 12:44:12,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:44:12,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6453 states. [2021-08-21 12:44:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6453 to 2940. [2021-08-21 12:44:12,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2940 states, 2939 states have (on average 3.8673018033344677) internal successors, (11366), 2939 states have internal predecessors, (11366), 0 states have call successors, (0), 0 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 12:44:12,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 11366 transitions. [2021-08-21 12:44:12,664 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 11366 transitions. Word has length 37 [2021-08-21 12:44:12,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:12,664 INFO L470 AbstractCegarLoop]: Abstraction has 2940 states and 11366 transitions. [2021-08-21 12:44:12,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:12,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 11366 transitions. [2021-08-21 12:44:12,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:44:12,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:12,670 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:12,689 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 12:44:12,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:12,889 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:12,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1101191603, now seen corresponding path program 15 times [2021-08-21 12:44:12,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:12,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765781053] [2021-08-21 12:44:12,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:12,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:44:12,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:12,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765781053] [2021-08-21 12:44:12,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765781053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:12,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298750418] [2021-08-21 12:44:12,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:44:12,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:12,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:12,948 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 12:44:12,971 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 12:44:13,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:44:13,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:13,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:44:13,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:44:13,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298750418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:13,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:13,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:44:13,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359573838] [2021-08-21 12:44:13,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:44:13,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:13,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:44:13,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:44:13,356 INFO L87 Difference]: Start difference. First operand 2940 states and 11366 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 12:44:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:13,512 INFO L93 Difference]: Finished difference Result 6855 states and 26188 transitions. [2021-08-21 12:44:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:44:13,512 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:44:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:13,527 INFO L225 Difference]: With dead ends: 6855 [2021-08-21 12:44:13,528 INFO L226 Difference]: Without dead ends: 6855 [2021-08-21 12:44:13,528 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:44:13,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6855 states. [2021-08-21 12:44:13,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6855 to 4570. [2021-08-21 12:44:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4569 states have (on average 4.03414313854235) internal successors, (18432), 4569 states have internal predecessors, (18432), 0 states have call successors, (0), 0 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 12:44:13,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 18432 transitions. [2021-08-21 12:44:13,615 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 18432 transitions. Word has length 39 [2021-08-21 12:44:13,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:13,616 INFO L470 AbstractCegarLoop]: Abstraction has 4570 states and 18432 transitions. [2021-08-21 12:44:13,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 12:44:13,616 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 18432 transitions. [2021-08-21 12:44:13,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:44:13,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:13,625 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, 1, 1, 1, 1] [2021-08-21 12:44:13,642 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 12:44:13,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:13,826 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:13,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:13,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2089718099, now seen corresponding path program 16 times [2021-08-21 12:44:13,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:13,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109593297] [2021-08-21 12:44:13,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:13,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:44:14,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:14,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109593297] [2021-08-21 12:44:14,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109593297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:14,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921493693] [2021-08-21 12:44:14,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:44:14,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:14,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:14,053 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 12:44:14,054 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 12:44:14,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:44:14,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:14,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:44:14,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:14,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 10 treesize of output 7 [2021-08-21 12:44:14,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-08-21 12:44:14,964 INFO L354 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2021-08-21 12:44:14,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 42 [2021-08-21 12:44:15,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:44:15,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 68 [2021-08-21 12:44:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:44:15,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921493693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:15,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:15,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-08-21 12:44:15,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518903589] [2021-08-21 12:44:15,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:44:15,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:15,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:44:15,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:44:15,367 INFO L87 Difference]: Start difference. First operand 4570 states and 18432 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:15,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:15,979 INFO L93 Difference]: Finished difference Result 11352 states and 45419 transitions. [2021-08-21 12:44:15,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:44:15,979 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 12:44:15,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:15,988 INFO L225 Difference]: With dead ends: 11352 [2021-08-21 12:44:15,988 INFO L226 Difference]: Without dead ends: 4044 [2021-08-21 12:44:15,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 392.6ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:44:15,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4044 states. [2021-08-21 12:44:16,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4044 to 4044. [2021-08-21 12:44:16,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4044 states, 4043 states have (on average 4.014593123917883) internal successors, (16231), 4043 states have internal predecessors, (16231), 0 states have call successors, (0), 0 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 12:44:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4044 states to 4044 states and 16231 transitions. [2021-08-21 12:44:16,052 INFO L78 Accepts]: Start accepts. Automaton has 4044 states and 16231 transitions. Word has length 41 [2021-08-21 12:44:16,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:16,052 INFO L470 AbstractCegarLoop]: Abstraction has 4044 states and 16231 transitions. [2021-08-21 12:44:16,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:16,052 INFO L276 IsEmpty]: Start isEmpty. Operand 4044 states and 16231 transitions. [2021-08-21 12:44:16,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:44:16,060 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:16,061 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:16,082 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 12:44:16,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:16,271 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:16,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:16,271 INFO L82 PathProgramCache]: Analyzing trace with hash -146507655, now seen corresponding path program 17 times [2021-08-21 12:44:16,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:16,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852601083] [2021-08-21 12:44:16,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:16,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:44:16,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:16,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852601083] [2021-08-21 12:44:16,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852601083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:16,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610029600] [2021-08-21 12:44:16,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:44:16,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:16,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:16,313 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 12:44:16,340 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 12:44:16,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:44:16,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:16,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:44:16,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:44:16,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610029600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:16,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:16,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 12:44:16,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889871203] [2021-08-21 12:44:16,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:44:16,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:16,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:44:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:44:16,870 INFO L87 Difference]: Start difference. First operand 4044 states and 16231 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 12:44:18,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:18,037 INFO L93 Difference]: Finished difference Result 20696 states and 78966 transitions. [2021-08-21 12:44:18,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-21 12:44:18,038 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 12:44:18,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:18,087 INFO L225 Difference]: With dead ends: 20696 [2021-08-21 12:44:18,087 INFO L226 Difference]: Without dead ends: 19139 [2021-08-21 12:44:18,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2485 ImplicationChecksByTransitivity, 692.1ms TimeCoverageRelationStatistics Valid=1482, Invalid=5658, Unknown=0, NotChecked=0, Total=7140 [2021-08-21 12:44:18,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19139 states. [2021-08-21 12:44:18,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19139 to 11110. [2021-08-21 12:44:18,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11110 states, 11109 states have (on average 4.243046178773967) internal successors, (47136), 11109 states have internal predecessors, (47136), 0 states have call successors, (0), 0 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 12:44:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11110 states to 11110 states and 47136 transitions. [2021-08-21 12:44:18,431 INFO L78 Accepts]: Start accepts. Automaton has 11110 states and 47136 transitions. Word has length 41 [2021-08-21 12:44:18,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:18,431 INFO L470 AbstractCegarLoop]: Abstraction has 11110 states and 47136 transitions. [2021-08-21 12:44:18,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 12:44:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 11110 states and 47136 transitions. [2021-08-21 12:44:18,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:44:18,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:18,455 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:44:18,472 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 12:44:18,656 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,SelfDestructingSolverStorable26 [2021-08-21 12:44:18,657 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:18,657 INFO L82 PathProgramCache]: Analyzing trace with hash -919548545, now seen corresponding path program 18 times [2021-08-21 12:44:18,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:18,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730013899] [2021-08-21 12:44:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:18,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:44:18,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:18,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730013899] [2021-08-21 12:44:18,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730013899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:18,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539253061] [2021-08-21 12:44:18,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:44:18,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:18,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:18,695 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 12:44:18,699 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 12:44:19,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:44:19,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:19,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:44:19,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-21 12:44:19,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539253061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:19,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:19,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-08-21 12:44:19,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758793017] [2021-08-21 12:44:19,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:44:19,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:19,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:44:19,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:44:19,241 INFO L87 Difference]: Start difference. First operand 11110 states and 47136 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:20,250 INFO L93 Difference]: Finished difference Result 54800 states and 219689 transitions. [2021-08-21 12:44:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 12:44:20,251 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 12:44:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:20,480 INFO L225 Difference]: With dead ends: 54800 [2021-08-21 12:44:20,480 INFO L226 Difference]: Without dead ends: 53516 [2021-08-21 12:44:20,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=585, Invalid=1767, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:44:20,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53516 states. [2021-08-21 12:44:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53516 to 25145. [2021-08-21 12:44:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25145 states, 25144 states have (on average 4.468859370028635) internal successors, (112365), 25144 states have internal predecessors, (112365), 0 states have call successors, (0), 0 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 12:44:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25145 states to 25145 states and 112365 transitions. [2021-08-21 12:44:21,751 INFO L78 Accepts]: Start accepts. Automaton has 25145 states and 112365 transitions. Word has length 41 [2021-08-21 12:44:21,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:21,751 INFO L470 AbstractCegarLoop]: Abstraction has 25145 states and 112365 transitions. [2021-08-21 12:44:21,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 25145 states and 112365 transitions. [2021-08-21 12:44:21,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:44:21,813 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:21,814 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, 1, 1, 1, 1] [2021-08-21 12:44:21,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 12:44:22,029 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,SelfDestructingSolverStorable27 [2021-08-21 12:44:22,029 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:22,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:22,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2041409643, now seen corresponding path program 19 times [2021-08-21 12:44:22,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:22,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608046926] [2021-08-21 12:44:22,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:22,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:44:22,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:22,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608046926] [2021-08-21 12:44:22,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608046926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:22,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688854682] [2021-08-21 12:44:22,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:44:22,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:22,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:22,225 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 12:44:22,225 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 12:44:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:22,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:44:22,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:23,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-08-21 12:44:23,160 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-08-21 12:44:23,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-08-21 12:44:23,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:44:23,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2021-08-21 12:44:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:44:23,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688854682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:23,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:23,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-21 12:44:23,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19547995] [2021-08-21 12:44:23,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:44:23,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:23,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:44:23,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:44:23,286 INFO L87 Difference]: Start difference. First operand 25145 states and 112365 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:24,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:24,277 INFO L93 Difference]: Finished difference Result 48831 states and 214520 transitions. [2021-08-21 12:44:24,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:44:24,277 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 12:44:24,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:24,327 INFO L225 Difference]: With dead ends: 48831 [2021-08-21 12:44:24,328 INFO L226 Difference]: Without dead ends: 15513 [2021-08-21 12:44:24,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 372.9ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:44:24,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15513 states. [2021-08-21 12:44:24,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15513 to 15513. [2021-08-21 12:44:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15513 states, 15512 states have (on average 4.341348633316143) internal successors, (67343), 15512 states have internal predecessors, (67343), 0 states have call successors, (0), 0 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 12:44:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15513 states to 15513 states and 67343 transitions. [2021-08-21 12:44:24,821 INFO L78 Accepts]: Start accepts. Automaton has 15513 states and 67343 transitions. Word has length 41 [2021-08-21 12:44:24,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:24,821 INFO L470 AbstractCegarLoop]: Abstraction has 15513 states and 67343 transitions. [2021-08-21 12:44:24,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 15513 states and 67343 transitions. [2021-08-21 12:44:24,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:44:24,850 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:24,850 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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 12:44:24,867 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 12:44:25,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 12:44:25,057 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:25,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:25,057 INFO L82 PathProgramCache]: Analyzing trace with hash -951871965, now seen corresponding path program 20 times [2021-08-21 12:44:25,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:25,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781211429] [2021-08-21 12:44:25,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:25,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:44:25,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:25,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781211429] [2021-08-21 12:44:25,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781211429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:25,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078259975] [2021-08-21 12:44:25,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:44:25,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:25,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:25,109 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 12:44:25,132 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 12:44:25,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:44:25,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:25,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:44:25,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:44:25,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078259975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:25,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:25,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:44:25,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912381436] [2021-08-21 12:44:25,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:44:25,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:25,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:44:25,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:44:25,750 INFO L87 Difference]: Start difference. First operand 15513 states and 67343 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:26,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:26,075 INFO L93 Difference]: Finished difference Result 26866 states and 107274 transitions. [2021-08-21 12:44:26,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:44:26,076 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:44:26,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:26,169 INFO L225 Difference]: With dead ends: 26866 [2021-08-21 12:44:26,169 INFO L226 Difference]: Without dead ends: 26866 [2021-08-21 12:44:26,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:44:26,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26866 states. [2021-08-21 12:44:26,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26866 to 12035. [2021-08-21 12:44:26,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12035 states, 12034 states have (on average 4.1740069802227024) internal successors, (50230), 12034 states have internal predecessors, (50230), 0 states have call successors, (0), 0 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 12:44:26,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12035 states to 12035 states and 50230 transitions. [2021-08-21 12:44:26,670 INFO L78 Accepts]: Start accepts. Automaton has 12035 states and 50230 transitions. Word has length 43 [2021-08-21 12:44:26,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:26,670 INFO L470 AbstractCegarLoop]: Abstraction has 12035 states and 50230 transitions. [2021-08-21 12:44:26,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 12035 states and 50230 transitions. [2021-08-21 12:44:26,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:44:26,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:26,692 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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 12:44:26,709 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 12:44:26,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:26,895 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:26,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:26,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1407213753, now seen corresponding path program 21 times [2021-08-21 12:44:26,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:26,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485533892] [2021-08-21 12:44:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:26,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:44:26,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:26,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485533892] [2021-08-21 12:44:26,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485533892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:26,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590175748] [2021-08-21 12:44:26,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:44:26,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:26,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:26,938 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 12:44:26,938 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 12:44:27,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:44:27,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:27,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:44:27,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:44:27,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590175748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:27,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:27,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-08-21 12:44:27,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561436862] [2021-08-21 12:44:27,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:44:27,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:27,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:44:27,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:44:27,601 INFO L87 Difference]: Start difference. First operand 12035 states and 50230 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:29,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:29,136 INFO L93 Difference]: Finished difference Result 32715 states and 130266 transitions. [2021-08-21 12:44:29,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-21 12:44:29,136 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:44:29,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:29,243 INFO L225 Difference]: With dead ends: 32715 [2021-08-21 12:44:29,244 INFO L226 Difference]: Without dead ends: 31583 [2021-08-21 12:44:29,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 915.9ms TimeCoverageRelationStatistics Valid=1859, Invalid=6151, Unknown=0, NotChecked=0, Total=8010 [2021-08-21 12:44:29,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31583 states. [2021-08-21 12:44:29,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31583 to 16106. [2021-08-21 12:44:29,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16106 states, 16105 states have (on average 4.1680223533064265) internal successors, (67126), 16105 states have internal predecessors, (67126), 0 states have call successors, (0), 0 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 12:44:29,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16106 states to 16106 states and 67126 transitions. [2021-08-21 12:44:29,750 INFO L78 Accepts]: Start accepts. Automaton has 16106 states and 67126 transitions. Word has length 43 [2021-08-21 12:44:29,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:29,751 INFO L470 AbstractCegarLoop]: Abstraction has 16106 states and 67126 transitions. [2021-08-21 12:44:29,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:44:29,751 INFO L276 IsEmpty]: Start isEmpty. Operand 16106 states and 67126 transitions. [2021-08-21 12:44:29,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:44:29,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:44:29,786 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, 1, 1, 1, 1] [2021-08-21 12:44:29,804 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 12:44:29,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:29,995 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:44:29,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:44:29,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1023806881, now seen corresponding path program 22 times [2021-08-21 12:44:29,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:44:29,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784917663] [2021-08-21 12:44:29,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:44:29,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:44:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:44:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-21 12:44:30,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:44:30,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784917663] [2021-08-21 12:44:30,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784917663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:30,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689235502] [2021-08-21 12:44:30,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:44:30,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:44:30,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:44:30,269 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 12:44:30,277 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 12:44:30,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:44:30,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:44:30,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:44:30,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:44:31,084 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-08-21 12:44:31,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-08-21 12:44:31,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:44:31,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 30 [2021-08-21 12:44:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:44:31,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689235502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:44:31,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:44:31,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 23 [2021-08-21 12:44:31,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387484171] [2021-08-21 12:44:31,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:44:31,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:44:31,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:44:31,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:44:31,262 INFO L87 Difference]: Start difference. First operand 16106 states and 67126 transitions. Second operand has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 12:44:32,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:44:32,373 INFO L93 Difference]: Finished difference Result 25041 states and 102775 transitions. [2021-08-21 12:44:32,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:44:32,374 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:44:32,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:44:32,374 INFO L225 Difference]: With dead ends: 25041 [2021-08-21 12:44:32,374 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 12:44:32,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 626.5ms TimeCoverageRelationStatistics Valid=302, Invalid=1678, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 12:44:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 12:44:32,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 12:44:32,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 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 12:44:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 12:44:32,376 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2021-08-21 12:44:32,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:44:32,376 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 12:44:32,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 12:44:32,376 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 12:44:32,376 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 12:44:32,378 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 12:44:32,378 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 12:44:32,378 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 12:44:32,378 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 12:44:32,378 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-21 12:44:32,395 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 12:44:32,579 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,SelfDestructingSolverStorable31 [2021-08-21 12:44:32,583 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 12:44:32,583 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 12:44:32,584 INFO L202 PluginConnector]: Adding new model min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 12:44:32 BasicIcfg [2021-08-21 12:44:32,585 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 12:44:32,585 INFO L168 Benchmark]: Toolchain (without parser) took 36203.77 ms. Allocated memory was 191.9 MB in the beginning and 3.7 GB in the end (delta: 3.5 GB). Free memory was 172.5 MB in the beginning and 2.5 GB in the end (delta: -2.3 GB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-08-21 12:44:32,585 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 191.9 MB. Free memory is still 173.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:44:32,586 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.45 ms. Allocated memory is still 191.9 MB. Free memory was 172.5 MB in the beginning and 170.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 12:44:32,586 INFO L168 Benchmark]: Boogie Preprocessor took 12.51 ms. Allocated memory is still 191.9 MB. Free memory was 170.9 MB in the beginning and 170.0 MB in the end (delta: 895.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:44:32,586 INFO L168 Benchmark]: RCFGBuilder took 280.59 ms. Allocated memory is still 191.9 MB. Free memory was 169.9 MB in the beginning and 155.9 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 12:44:32,586 INFO L168 Benchmark]: TraceAbstraction took 35886.73 ms. Allocated memory was 191.9 MB in the beginning and 3.7 GB in the end (delta: 3.5 GB). Free memory was 155.5 MB in the beginning and 2.5 GB in the end (delta: -2.3 GB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-08-21 12:44:32,587 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 0.11 ms. Allocated memory is still 191.9 MB. Free memory is still 173.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.45 ms. Allocated memory is still 191.9 MB. Free memory was 172.5 MB in the beginning and 170.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.51 ms. Allocated memory is still 191.9 MB. Free memory was 170.9 MB in the beginning and 170.0 MB in the end (delta: 895.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 280.59 ms. Allocated memory is still 191.9 MB. Free memory was 169.9 MB in the beginning and 155.9 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 35886.73 ms. Allocated memory was 191.9 MB in the beginning and 3.7 GB in the end (delta: 3.5 GB). Free memory was 155.5 MB in the beginning and 2.5 GB in the end (delta: -2.3 GB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 77]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 56 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 35824.0ms, OverallIterations: 32, TraceHistogramMax: 4, EmptinessCheckTime: 305.2ms, AutomataDifference: 11500.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 96.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1802 SDtfs, 7144 SDslu, 9193 SDs, 0 SdLazy, 7672 SolverSat, 1229 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3720.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1450 GetRequests, 800 SyntacticMatches, 25 SemanticMatches, 625 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8519 ImplicationChecksByTransitivity, 5397.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25145occurred in iteration=28, InterpolantAutomatonStates: 577, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4284.1ms AutomataMinimizationTime, 32 MinimizatonAttempts, 89621 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 168.8ms SsaConstructionTime, 567.3ms SatisfiabilityAnalysisTime, 7282.0ms InterpolantComputationTime, 1917 NumberOfCodeBlocks, 1911 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 1860 ConstructedInterpolants, 2 QuantifiedInterpolants, 9470 SizeOfPredicates, 49 NumberOfNonLiveVariables, 2402 ConjunctsInSsa, 269 ConjunctsInUnsatCore, 57 InterpolantComputations, 7 PerfectInterpolantSequences, 360/779 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-21 12:44:32,610 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 0 Received shutdown request...