/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-more/queue-add-3-nl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 13:20:40,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 13:20:40,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 13:20:40,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 13:20:40,931 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 13:20:40,967 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 13:20:40,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 13:20:40,967 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 13:20:40,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 13:20:40,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 13:20:40,971 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 13:20:40,971 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 13:20:40,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 13:20:40,971 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 13:20:40,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 13:20:40,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 13:20:40,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 13:20:40,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 13:20:40,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 13:20:40,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 13:20:40,973 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 13:20:40,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 13:20:40,973 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 13:20:40,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 13:20:40,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 13:20:40,974 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 13:20:40,974 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 13:20:40,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 13:20:40,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:20:40,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 13:20:40,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 13:20:40,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 13:20:40,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 13:20:40,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 13:20:40,976 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 13:20:40,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 13:20:40,976 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 13:20:41,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 13:20:41,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 13:20:41,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 13:20:41,289 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 13:20:41,290 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 13:20:41,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl [2021-08-21 13:20:41,307 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl' [2021-08-21 13:20:41,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 13:20:41,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 13:20:41,513 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 13:20:41,513 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 13:20:41,513 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 13:20:41,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:20:41" (1/1) ... [2021-08-21 13:20:41,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:20:41" (1/1) ... [2021-08-21 13:20:41,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 13:20:41,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 13:20:41,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 13:20:41,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 13:20:41,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:20:41" (1/1) ... [2021-08-21 13:20:41,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:20:41" (1/1) ... [2021-08-21 13:20:41,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:20:41" (1/1) ... [2021-08-21 13:20:41,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:20:41" (1/1) ... [2021-08-21 13:20:41,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:20:41" (1/1) ... [2021-08-21 13:20:41,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:20:41" (1/1) ... [2021-08-21 13:20:41,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:20:41" (1/1) ... [2021-08-21 13:20:41,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 13:20:41,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 13:20:41,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 13:20:41,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 13:20:41,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:20:41" (1/1) ... [2021-08-21 13:20:41,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:20:41,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:41,588 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 13:20:41,603 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 13:20:41,638 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 13:20:41,638 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 13:20:41,638 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 13:20:41,638 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 13:20:41,639 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 13:20:41,639 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 13:20:41,639 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 13:20:41,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 13:20:41,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 13:20:41,639 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 13:20:41,639 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 13:20:41,639 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 13:20:41,640 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 13:20:41,851 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 13:20:41,851 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 13:20:41,853 INFO L202 PluginConnector]: Adding new model queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:20:41 BoogieIcfgContainer [2021-08-21 13:20:41,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 13:20:41,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 13:20:41,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 13:20:41,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 13:20:41,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:20:41" (1/2) ... [2021-08-21 13:20:41,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627c8bf6 and model type queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:20:41, skipping insertion in model container [2021-08-21 13:20:41,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:20:41" (2/2) ... [2021-08-21 13:20:41,859 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-3-nl.wvr.bpl [2021-08-21 13:20:41,862 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 13:20:41,862 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 13:20:41,862 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 13:20:41,863 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 13:20:41,943 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 13:20:41,991 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 13:20:41,995 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 13:20:41,996 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 13:20:42,004 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 42 transitions, 108 flow [2021-08-21 13:20:42,085 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1013 states, 1012 states have (on average 2.975296442687747) internal successors, (3011), 1012 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:42,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 1013 states, 1012 states have (on average 2.975296442687747) internal successors, (3011), 1012 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:42,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:20:42,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:42,115 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:20:42,116 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:42,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1996667167, now seen corresponding path program 1 times [2021-08-21 13:20:42,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:42,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192433925] [2021-08-21 13:20:42,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:42,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:42,255 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 13:20:42,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:42,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192433925] [2021-08-21 13:20:42,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192433925] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:20:42,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:20:42,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:20:42,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314322161] [2021-08-21 13:20:42,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:20:42,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:42,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:20:42,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:20:42,283 INFO L87 Difference]: Start difference. First operand has 1013 states, 1012 states have (on average 2.975296442687747) internal successors, (3011), 1012 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:42,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:42,353 INFO L93 Difference]: Finished difference Result 1112 states and 3308 transitions. [2021-08-21 13:20:42,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:20:42,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 13:20:42,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:42,384 INFO L225 Difference]: With dead ends: 1112 [2021-08-21 13:20:42,385 INFO L226 Difference]: Without dead ends: 1112 [2021-08-21 13:20:42,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:20:42,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-08-21 13:20:42,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2021-08-21 13:20:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.9774977497749773) internal successors, (3308), 1111 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:42,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3308 transitions. [2021-08-21 13:20:42,502 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3308 transitions. Word has length 22 [2021-08-21 13:20:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:42,502 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3308 transitions. [2021-08-21 13:20:42,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:42,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3308 transitions. [2021-08-21 13:20:42,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:20:42,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:42,508 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] [2021-08-21 13:20:42,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 13:20:42,509 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:42,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:42,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1213084767, now seen corresponding path program 1 times [2021-08-21 13:20:42,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:42,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635286576] [2021-08-21 13:20:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:42,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:42,596 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 13:20:42,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:42,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635286576] [2021-08-21 13:20:42,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635286576] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:20:42,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:20:42,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 13:20:42,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709175652] [2021-08-21 13:20:42,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:20:42,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:42,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:20:42,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:20:42,600 INFO L87 Difference]: Start difference. First operand 1112 states and 3308 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:42,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:42,626 INFO L93 Difference]: Finished difference Result 1165 states and 3465 transitions. [2021-08-21 13:20:42,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:20:42,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:20:42,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:42,634 INFO L225 Difference]: With dead ends: 1165 [2021-08-21 13:20:42,635 INFO L226 Difference]: Without dead ends: 1165 [2021-08-21 13:20:42,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:20:42,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-08-21 13:20:42,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1165. [2021-08-21 13:20:42,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 2.9768041237113403) internal successors, (3465), 1164 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:42,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3465 transitions. [2021-08-21 13:20:42,679 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3465 transitions. Word has length 28 [2021-08-21 13:20:42,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:42,680 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 3465 transitions. [2021-08-21 13:20:42,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:42,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3465 transitions. [2021-08-21 13:20:42,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:20:42,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:42,686 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] [2021-08-21 13:20:42,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 13:20:42,686 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:42,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:42,687 INFO L82 PathProgramCache]: Analyzing trace with hash -989860967, now seen corresponding path program 2 times [2021-08-21 13:20:42,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:42,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409727146] [2021-08-21 13:20:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:42,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:20:42,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:42,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409727146] [2021-08-21 13:20:42,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409727146] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:20:42,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:20:42,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:20:42,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060773059] [2021-08-21 13:20:42,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:20:42,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:42,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:20:42,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:20:42,756 INFO L87 Difference]: Start difference. First operand 1165 states and 3465 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:42,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:42,787 INFO L93 Difference]: Finished difference Result 1281 states and 3812 transitions. [2021-08-21 13:20:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:20:42,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:20:42,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:42,795 INFO L225 Difference]: With dead ends: 1281 [2021-08-21 13:20:42,796 INFO L226 Difference]: Without dead ends: 1281 [2021-08-21 13:20:42,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:20:42,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-08-21 13:20:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2021-08-21 13:20:42,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 2.978125) internal successors, (3812), 1280 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:42,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 3812 transitions. [2021-08-21 13:20:42,844 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 3812 transitions. Word has length 28 [2021-08-21 13:20:42,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:42,845 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 3812 transitions. [2021-08-21 13:20:42,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:42,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 3812 transitions. [2021-08-21 13:20:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:20:42,850 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:42,850 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, 1, 1, 1, 1] [2021-08-21 13:20:42,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 13:20:42,850 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:42,851 INFO L82 PathProgramCache]: Analyzing trace with hash 416907713, now seen corresponding path program 1 times [2021-08-21 13:20:42,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:42,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613782961] [2021-08-21 13:20:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:42,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:43,510 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 13:20:43,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:43,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613782961] [2021-08-21 13:20:43,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613782961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:43,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48897833] [2021-08-21 13:20:43,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:43,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:43,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:43,524 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 13:20:43,538 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 13:20:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:43,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:20:43,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:44,462 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 13:20:44,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48897833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:44,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:44,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-21 13:20:44,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799416497] [2021-08-21 13:20:44,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:20:44,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:44,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:20:44,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:20:44,465 INFO L87 Difference]: Start difference. First operand 1281 states and 3812 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:45,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:45,293 INFO L93 Difference]: Finished difference Result 2269 states and 6580 transitions. [2021-08-21 13:20:45,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:20:45,294 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:20:45,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:45,307 INFO L225 Difference]: With dead ends: 2269 [2021-08-21 13:20:45,307 INFO L226 Difference]: Without dead ends: 2254 [2021-08-21 13:20:45,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 727.6ms TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:20:45,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-08-21 13:20:45,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1446. [2021-08-21 13:20:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 2.9577854671280277) internal successors, (4274), 1445 states have internal predecessors, (4274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:45,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4274 transitions. [2021-08-21 13:20:45,365 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4274 transitions. Word has length 33 [2021-08-21 13:20:45,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:45,366 INFO L470 AbstractCegarLoop]: Abstraction has 1446 states and 4274 transitions. [2021-08-21 13:20:45,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:45,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4274 transitions. [2021-08-21 13:20:45,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:20:45,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:45,370 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, 1, 1, 1, 1] [2021-08-21 13:20:45,397 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 13:20:45,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:45,587 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:45,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:45,588 INFO L82 PathProgramCache]: Analyzing trace with hash -351824383, now seen corresponding path program 2 times [2021-08-21 13:20:45,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:45,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934805834] [2021-08-21 13:20:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:45,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:45,971 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 13:20:45,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:45,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934805834] [2021-08-21 13:20:45,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934805834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:45,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755766205] [2021-08-21 13:20:45,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:20:45,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:45,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:45,973 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 13:20:45,975 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 13:20:46,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:20:46,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:46,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:20:46,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:46,571 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 5 treesize of output 3 [2021-08-21 13:20:46,946 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 13:20:46,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755766205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:46,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:46,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:20:46,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574361452] [2021-08-21 13:20:46,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:20:46,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:46,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:20:46,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:20:46,949 INFO L87 Difference]: Start difference. First operand 1446 states and 4274 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:47,636 INFO L93 Difference]: Finished difference Result 2055 states and 6003 transitions. [2021-08-21 13:20:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:20:47,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 13:20:47,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:47,648 INFO L225 Difference]: With dead ends: 2055 [2021-08-21 13:20:47,648 INFO L226 Difference]: Without dead ends: 2036 [2021-08-21 13:20:47,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 640.2ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:20:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-08-21 13:20:47,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1460. [2021-08-21 13:20:47,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 2.9588759424263196) internal successors, (4317), 1459 states have internal predecessors, (4317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4317 transitions. [2021-08-21 13:20:47,690 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4317 transitions. Word has length 33 [2021-08-21 13:20:47,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:47,690 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 4317 transitions. [2021-08-21 13:20:47,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4317 transitions. [2021-08-21 13:20:47,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:20:47,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:47,694 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, 1, 1, 1, 1] [2021-08-21 13:20:47,723 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 13:20:47,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:47,913 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:47,913 INFO L82 PathProgramCache]: Analyzing trace with hash 524358081, now seen corresponding path program 3 times [2021-08-21 13:20:47,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:47,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111444476] [2021-08-21 13:20:47,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:47,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:48,320 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 13:20:48,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:48,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111444476] [2021-08-21 13:20:48,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111444476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:48,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379380231] [2021-08-21 13:20:48,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:20:48,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:48,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:48,330 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 13:20:48,331 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 13:20:48,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:20:48,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:48,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:20:48,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:48,911 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 5 treesize of output 3 [2021-08-21 13:20:49,454 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 13:20:49,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379380231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:49,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:49,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:20:49,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78764302] [2021-08-21 13:20:49,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:20:49,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:49,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:20:49,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:20:49,457 INFO L87 Difference]: Start difference. First operand 1460 states and 4317 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:50,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:50,395 INFO L93 Difference]: Finished difference Result 1869 states and 5410 transitions. [2021-08-21 13:20:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:20:50,395 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 13:20:50,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:50,404 INFO L225 Difference]: With dead ends: 1869 [2021-08-21 13:20:50,404 INFO L226 Difference]: Without dead ends: 1854 [2021-08-21 13:20:50,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 828.9ms TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:20:50,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-08-21 13:20:50,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1458. [2021-08-21 13:20:50,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 2.959505833905285) internal successors, (4312), 1457 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:50,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 4312 transitions. [2021-08-21 13:20:50,443 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 4312 transitions. Word has length 33 [2021-08-21 13:20:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:50,443 INFO L470 AbstractCegarLoop]: Abstraction has 1458 states and 4312 transitions. [2021-08-21 13:20:50,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:50,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 4312 transitions. [2021-08-21 13:20:50,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:20:50,447 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:50,448 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:20:50,471 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 13:20:50,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:50,661 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:50,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:50,661 INFO L82 PathProgramCache]: Analyzing trace with hash -210109243, now seen corresponding path program 4 times [2021-08-21 13:20:50,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:50,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048158657] [2021-08-21 13:20:50,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:50,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:51,029 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 13:20:51,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:51,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048158657] [2021-08-21 13:20:51,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048158657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:51,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652050260] [2021-08-21 13:20:51,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:20:51,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:51,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:51,031 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 13:20:51,031 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 13:20:51,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:20:51,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:51,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:20:51,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:52,079 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 13:20:52,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652050260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:52,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:52,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-21 13:20:52,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236476151] [2021-08-21 13:20:52,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:20:52,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:52,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:20:52,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:20:52,080 INFO L87 Difference]: Start difference. First operand 1458 states and 4312 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:52,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:52,856 INFO L93 Difference]: Finished difference Result 2568 states and 7386 transitions. [2021-08-21 13:20:52,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:20:52,856 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:20:52,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:52,869 INFO L225 Difference]: With dead ends: 2568 [2021-08-21 13:20:52,869 INFO L226 Difference]: Without dead ends: 2553 [2021-08-21 13:20:52,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 737.0ms TimeCoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:20:52,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-08-21 13:20:52,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1477. [2021-08-21 13:20:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.959349593495935) internal successors, (4368), 1476 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4368 transitions. [2021-08-21 13:20:52,928 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4368 transitions. Word has length 33 [2021-08-21 13:20:52,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:52,929 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 4368 transitions. [2021-08-21 13:20:52,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:52,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4368 transitions. [2021-08-21 13:20:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:20:52,935 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:52,935 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, 1, 1, 1, 1] [2021-08-21 13:20:52,963 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 13:20:53,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:53,161 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:53,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:53,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1493256703, now seen corresponding path program 5 times [2021-08-21 13:20:53,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:53,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646456906] [2021-08-21 13:20:53,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:53,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:53,494 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 13:20:53,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:53,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646456906] [2021-08-21 13:20:53,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646456906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:53,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360659721] [2021-08-21 13:20:53,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:20:53,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:53,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:53,508 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 13:20:53,509 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 13:20:53,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:20:53,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:53,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:20:53,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:54,582 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 13:20:54,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360659721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:54,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:54,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-21 13:20:54,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466174308] [2021-08-21 13:20:54,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:20:54,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:54,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:20:54,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:20:54,587 INFO L87 Difference]: Start difference. First operand 1477 states and 4368 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:55,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:55,253 INFO L93 Difference]: Finished difference Result 2510 states and 7227 transitions. [2021-08-21 13:20:55,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:20:55,254 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:20:55,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:55,262 INFO L225 Difference]: With dead ends: 2510 [2021-08-21 13:20:55,263 INFO L226 Difference]: Without dead ends: 2495 [2021-08-21 13:20:55,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 685.2ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:20:55,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-08-21 13:20:55,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 1477. [2021-08-21 13:20:55,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.959349593495935) internal successors, (4368), 1476 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4368 transitions. [2021-08-21 13:20:55,306 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4368 transitions. Word has length 33 [2021-08-21 13:20:55,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:55,307 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 4368 transitions. [2021-08-21 13:20:55,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4368 transitions. [2021-08-21 13:20:55,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:20:55,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:55,311 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, 1, 1, 1, 1] [2021-08-21 13:20:55,338 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 13:20:55,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:55,529 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:55,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:55,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1209675547, now seen corresponding path program 6 times [2021-08-21 13:20:55,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:55,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726749720] [2021-08-21 13:20:55,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:55,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:55,905 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 13:20:55,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:55,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726749720] [2021-08-21 13:20:55,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726749720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:55,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475573954] [2021-08-21 13:20:55,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:20:55,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:55,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:55,906 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 13:20:55,907 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 13:20:56,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:20:56,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:56,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:20:56,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:57,055 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 13:20:57,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475573954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:57,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:57,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:20:57,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357596020] [2021-08-21 13:20:57,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:20:57,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:57,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:20:57,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:20:57,057 INFO L87 Difference]: Start difference. First operand 1477 states and 4368 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 13:20:57,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:57,649 INFO L93 Difference]: Finished difference Result 2459 states and 7118 transitions. [2021-08-21 13:20:57,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:20:57,650 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 33 [2021-08-21 13:20:57,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:57,661 INFO L225 Difference]: With dead ends: 2459 [2021-08-21 13:20:57,661 INFO L226 Difference]: Without dead ends: 2444 [2021-08-21 13:20:57,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 562.5ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:20:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-08-21 13:20:57,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1561. [2021-08-21 13:20:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.943589743589744) internal successors, (4592), 1560 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:57,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4592 transitions. [2021-08-21 13:20:57,707 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4592 transitions. Word has length 33 [2021-08-21 13:20:57,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:57,708 INFO L470 AbstractCegarLoop]: Abstraction has 1561 states and 4592 transitions. [2021-08-21 13:20:57,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 13:20:57,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4592 transitions. [2021-08-21 13:20:57,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:20:57,712 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:57,712 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, 1, 1, 1, 1] [2021-08-21 13:20:57,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 13:20:57,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:57,937 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:57,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1245308595, now seen corresponding path program 7 times [2021-08-21 13:20:57,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:57,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396740444] [2021-08-21 13:20:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:57,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:58,282 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 13:20:58,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:58,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396740444] [2021-08-21 13:20:58,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396740444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:58,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597805922] [2021-08-21 13:20:58,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:20:58,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:58,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:58,285 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 13:20:58,319 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 13:20:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:58,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:20:58,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:59,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597805922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:59,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:59,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-21 13:20:59,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731491138] [2021-08-21 13:20:59,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:20:59,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:59,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:20:59,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:20:59,487 INFO L87 Difference]: Start difference. First operand 1561 states and 4592 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:00,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:00,407 INFO L93 Difference]: Finished difference Result 2207 states and 6308 transitions. [2021-08-21 13:21:00,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:21:00,407 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:21:00,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:00,414 INFO L225 Difference]: With dead ends: 2207 [2021-08-21 13:21:00,414 INFO L226 Difference]: Without dead ends: 2192 [2021-08-21 13:21:00,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 888.6ms TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:21:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-08-21 13:21:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1624. [2021-08-21 13:21:00,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 2.9457794208256316) internal successors, (4781), 1623 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 4781 transitions. [2021-08-21 13:21:00,467 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 4781 transitions. Word has length 33 [2021-08-21 13:21:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:00,467 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 4781 transitions. [2021-08-21 13:21:00,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 4781 transitions. [2021-08-21 13:21:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:00,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:00,472 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, 1, 1, 1, 1] [2021-08-21 13:21:00,497 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 13:21:00,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:00,689 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:00,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:00,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1474067439, now seen corresponding path program 8 times [2021-08-21 13:21:00,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:00,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483346239] [2021-08-21 13:21:00,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:00,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:01,018 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 13:21:01,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:01,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483346239] [2021-08-21 13:21:01,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483346239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:01,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454401069] [2021-08-21 13:21:01,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:21:01,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:01,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:01,019 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 13:21:01,020 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 13:21:01,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:21:01,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:01,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:21:01,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:01,939 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 5 treesize of output 3 [2021-08-21 13:21:02,287 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 13:21:02,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454401069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:02,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:02,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:21:02,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187583112] [2021-08-21 13:21:02,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:21:02,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:02,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:21:02,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:21:02,288 INFO L87 Difference]: Start difference. First operand 1624 states and 4781 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:02,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:02,861 INFO L93 Difference]: Finished difference Result 2231 states and 6489 transitions. [2021-08-21 13:21:02,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:21:02,861 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:21:02,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:02,866 INFO L225 Difference]: With dead ends: 2231 [2021-08-21 13:21:02,866 INFO L226 Difference]: Without dead ends: 2216 [2021-08-21 13:21:02,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 569.1ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:21:02,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-08-21 13:21:02,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1666. [2021-08-21 13:21:02,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 2.926126126126126) internal successors, (4872), 1665 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 4872 transitions. [2021-08-21 13:21:02,904 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 4872 transitions. Word has length 33 [2021-08-21 13:21:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:02,905 INFO L470 AbstractCegarLoop]: Abstraction has 1666 states and 4872 transitions. [2021-08-21 13:21:02,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:02,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 4872 transitions. [2021-08-21 13:21:02,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:02,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:02,909 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, 1, 1, 1, 1] [2021-08-21 13:21:02,940 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 13:21:03,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 13:21:03,125 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:03,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:03,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1874168057, now seen corresponding path program 9 times [2021-08-21 13:21:03,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:03,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14067406] [2021-08-21 13:21:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:03,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:03,441 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 13:21:03,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:03,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14067406] [2021-08-21 13:21:03,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14067406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:03,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537401023] [2021-08-21 13:21:03,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:21:03,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:03,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:03,445 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 13:21:03,474 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 13:21:04,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:21:04,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:04,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:21:04,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:04,387 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 5 treesize of output 3 [2021-08-21 13:21:04,804 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 13:21:04,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537401023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:04,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:04,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:21:04,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967091311] [2021-08-21 13:21:04,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:21:04,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:04,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:21:04,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:21:04,805 INFO L87 Difference]: Start difference. First operand 1666 states and 4872 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:05,434 INFO L93 Difference]: Finished difference Result 2618 states and 7539 transitions. [2021-08-21 13:21:05,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:21:05,435 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:21:05,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:05,440 INFO L225 Difference]: With dead ends: 2618 [2021-08-21 13:21:05,441 INFO L226 Difference]: Without dead ends: 2603 [2021-08-21 13:21:05,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 570.0ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:21:05,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-08-21 13:21:05,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1708. [2021-08-21 13:21:05,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.919742237844171) internal successors, (4984), 1707 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 4984 transitions. [2021-08-21 13:21:05,482 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 4984 transitions. Word has length 33 [2021-08-21 13:21:05,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:05,482 INFO L470 AbstractCegarLoop]: Abstraction has 1708 states and 4984 transitions. [2021-08-21 13:21:05,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:05,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 4984 transitions. [2021-08-21 13:21:05,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:05,486 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:05,486 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, 1, 1, 1, 1] [2021-08-21 13:21:05,513 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 13:21:05,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:05,709 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:05,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:05,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1719730539, now seen corresponding path program 10 times [2021-08-21 13:21:05,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:05,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196645078] [2021-08-21 13:21:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:05,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:06,015 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 13:21:06,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:06,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196645078] [2021-08-21 13:21:06,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196645078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:06,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593928186] [2021-08-21 13:21:06,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:21:06,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:06,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:06,022 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 13:21:06,023 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 13:21:06,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:21:06,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:06,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:21:06,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:07,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593928186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:07,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:07,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-21 13:21:07,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616172872] [2021-08-21 13:21:07,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:21:07,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:07,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:21:07,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:21:07,395 INFO L87 Difference]: Start difference. First operand 1708 states and 4984 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:08,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:08,049 INFO L93 Difference]: Finished difference Result 2631 states and 7576 transitions. [2021-08-21 13:21:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:21:08,050 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:21:08,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:08,056 INFO L225 Difference]: With dead ends: 2631 [2021-08-21 13:21:08,057 INFO L226 Difference]: Without dead ends: 2616 [2021-08-21 13:21:08,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 577.8ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:21:08,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-08-21 13:21:08,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 1708. [2021-08-21 13:21:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.919742237844171) internal successors, (4984), 1707 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 4984 transitions. [2021-08-21 13:21:08,098 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 4984 transitions. Word has length 33 [2021-08-21 13:21:08,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:08,099 INFO L470 AbstractCegarLoop]: Abstraction has 1708 states and 4984 transitions. [2021-08-21 13:21:08,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:08,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 4984 transitions. [2021-08-21 13:21:08,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:08,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:08,102 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, 1, 1, 1, 1] [2021-08-21 13:21:08,129 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 13:21:08,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 13:21:08,325 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:08,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:08,325 INFO L82 PathProgramCache]: Analyzing trace with hash -679839295, now seen corresponding path program 11 times [2021-08-21 13:21:08,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:08,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606746136] [2021-08-21 13:21:08,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:08,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:08,616 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 13:21:08,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:08,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606746136] [2021-08-21 13:21:08,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606746136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:08,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910884804] [2021-08-21 13:21:08,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:21:08,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:08,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:08,621 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 13:21:08,654 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 13:21:09,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:21:09,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:09,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:21:09,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:10,046 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 13:21:10,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910884804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:10,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:10,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-21 13:21:10,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654608360] [2021-08-21 13:21:10,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:21:10,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:10,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:21:10,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:21:10,048 INFO L87 Difference]: Start difference. First operand 1708 states and 4984 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:10,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:10,832 INFO L93 Difference]: Finished difference Result 2176 states and 6261 transitions. [2021-08-21 13:21:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:21:10,833 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 13:21:10,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:10,839 INFO L225 Difference]: With dead ends: 2176 [2021-08-21 13:21:10,839 INFO L226 Difference]: Without dead ends: 2157 [2021-08-21 13:21:10,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 691.8ms TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:21:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-08-21 13:21:10,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1734. [2021-08-21 13:21:10,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 2.9272937103289096) internal successors, (5073), 1733 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:10,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5073 transitions. [2021-08-21 13:21:10,882 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5073 transitions. Word has length 33 [2021-08-21 13:21:10,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:10,883 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 5073 transitions. [2021-08-21 13:21:10,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:10,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5073 transitions. [2021-08-21 13:21:10,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:10,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:10,887 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, 1, 1, 1, 1] [2021-08-21 13:21:10,919 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 13:21:11,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 13:21:11,109 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:11,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:11,109 INFO L82 PathProgramCache]: Analyzing trace with hash 196343169, now seen corresponding path program 12 times [2021-08-21 13:21:11,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:11,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184183941] [2021-08-21 13:21:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:11,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:11,429 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 13:21:11,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:11,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184183941] [2021-08-21 13:21:11,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184183941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:11,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607591559] [2021-08-21 13:21:11,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:21:11,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:11,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:11,431 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 13:21:11,431 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 13:21:12,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:21:12,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:12,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:21:12,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:12,512 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 5 treesize of output 3 [2021-08-21 13:21:13,038 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 13:21:13,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607591559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:13,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:13,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:21:13,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299859679] [2021-08-21 13:21:13,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:21:13,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:13,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:21:13,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:21:13,040 INFO L87 Difference]: Start difference. First operand 1734 states and 5073 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:13,933 INFO L93 Difference]: Finished difference Result 2176 states and 6255 transitions. [2021-08-21 13:21:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:21:13,934 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:21:13,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:13,938 INFO L225 Difference]: With dead ends: 2176 [2021-08-21 13:21:13,938 INFO L226 Difference]: Without dead ends: 2161 [2021-08-21 13:21:13,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 876.9ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:21:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-08-21 13:21:13,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1730. [2021-08-21 13:21:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.925968768074031) internal successors, (5059), 1729 states have internal predecessors, (5059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:13,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5059 transitions. [2021-08-21 13:21:13,973 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5059 transitions. Word has length 33 [2021-08-21 13:21:13,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:13,973 INFO L470 AbstractCegarLoop]: Abstraction has 1730 states and 5059 transitions. [2021-08-21 13:21:13,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:13,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5059 transitions. [2021-08-21 13:21:13,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:13,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:13,976 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, 1, 1, 1, 1] [2021-08-21 13:21:14,004 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 13:21:14,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 13:21:14,193 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:14,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:14,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1906792959, now seen corresponding path program 13 times [2021-08-21 13:21:14,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:14,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504186872] [2021-08-21 13:21:14,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:14,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:14,452 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 13:21:14,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:14,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504186872] [2021-08-21 13:21:14,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504186872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:14,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558769228] [2021-08-21 13:21:14,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:21:14,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:14,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:14,453 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 13:21:14,454 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 13:21:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:15,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:21:15,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:15,849 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 13:21:15,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558769228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:15,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:15,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-21 13:21:15,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979358712] [2021-08-21 13:21:15,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:21:15,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:15,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:21:15,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:21:15,850 INFO L87 Difference]: Start difference. First operand 1730 states and 5059 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:16,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:16,332 INFO L93 Difference]: Finished difference Result 2313 states and 6721 transitions. [2021-08-21 13:21:16,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:21:16,333 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 13:21:16,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:16,336 INFO L225 Difference]: With dead ends: 2313 [2021-08-21 13:21:16,336 INFO L226 Difference]: Without dead ends: 2294 [2021-08-21 13:21:16,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 442.7ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:21:16,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-08-21 13:21:16,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1752. [2021-08-21 13:21:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-08-21 13:21:16,387 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-08-21 13:21:16,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:16,387 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-08-21 13:21:16,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:16,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-08-21 13:21:16,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:16,391 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:16,391 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, 1, 1, 1, 1] [2021-08-21 13:21:16,410 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 13:21:16,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 13:21:16,594 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:16,595 INFO L82 PathProgramCache]: Analyzing trace with hash 555256933, now seen corresponding path program 14 times [2021-08-21 13:21:16,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:16,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292295739] [2021-08-21 13:21:16,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:16,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:16,848 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 13:21:16,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:16,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292295739] [2021-08-21 13:21:16,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292295739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:16,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471759347] [2021-08-21 13:21:16,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:21:16,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:16,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:16,849 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 13:21:16,850 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 13:21:17,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:21:17,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:17,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:21:17,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:18,110 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 5 treesize of output 3 [2021-08-21 13:21:18,499 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 13:21:18,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471759347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:18,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:18,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:21:18,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816928862] [2021-08-21 13:21:18,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:21:18,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:18,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:21:18,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:21:18,500 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:18,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:18,970 INFO L93 Difference]: Finished difference Result 2339 states and 6772 transitions. [2021-08-21 13:21:18,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:21:18,971 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:21:18,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:18,974 INFO L225 Difference]: With dead ends: 2339 [2021-08-21 13:21:18,974 INFO L226 Difference]: Without dead ends: 2324 [2021-08-21 13:21:18,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 504.7ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:21:18,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-08-21 13:21:19,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 1752. [2021-08-21 13:21:19,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:19,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-08-21 13:21:19,011 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-08-21 13:21:19,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:19,011 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-08-21 13:21:19,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:19,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-08-21 13:21:19,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:19,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:19,015 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, 1, 1, 1, 1] [2021-08-21 13:21:19,040 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 13:21:19,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:19,230 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:19,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:19,230 INFO L82 PathProgramCache]: Analyzing trace with hash -300690715, now seen corresponding path program 15 times [2021-08-21 13:21:19,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:19,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750594657] [2021-08-21 13:21:19,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:19,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:19,510 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 13:21:19,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:19,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750594657] [2021-08-21 13:21:19,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750594657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:19,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419845653] [2021-08-21 13:21:19,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:21:19,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:19,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:19,512 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 13:21:19,514 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 13:21:20,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:21:20,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:20,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:21:20,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:20,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-21 13:21:21,278 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 13:21:21,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419845653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:21,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:21,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:21:21,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24661627] [2021-08-21 13:21:21,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:21:21,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:21,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:21:21,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:21:21,279 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:22,152 INFO L93 Difference]: Finished difference Result 2279 states and 6498 transitions. [2021-08-21 13:21:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:21:22,153 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:21:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:22,157 INFO L225 Difference]: With dead ends: 2279 [2021-08-21 13:21:22,157 INFO L226 Difference]: Without dead ends: 2264 [2021-08-21 13:21:22,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 819.3ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:21:22,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-08-21 13:21:22,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1773. [2021-08-21 13:21:22,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1772 states have (on average 2.9283295711060946) internal successors, (5189), 1772 states have internal predecessors, (5189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:22,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 5189 transitions. [2021-08-21 13:21:22,193 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 5189 transitions. Word has length 33 [2021-08-21 13:21:22,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:22,193 INFO L470 AbstractCegarLoop]: Abstraction has 1773 states and 5189 transitions. [2021-08-21 13:21:22,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:22,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 5189 transitions. [2021-08-21 13:21:22,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:22,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:22,196 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:21:22,227 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 13:21:22,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 13:21:22,413 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:22,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:22,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1967089301, now seen corresponding path program 16 times [2021-08-21 13:21:22,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:22,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404571486] [2021-08-21 13:21:22,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:22,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:22,680 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 13:21:22,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:22,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404571486] [2021-08-21 13:21:22,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404571486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:22,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749327711] [2021-08-21 13:21:22,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:21:22,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:22,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:22,681 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 13:21:22,682 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 13:21:23,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:21:23,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:23,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:21:23,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:24,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749327711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:24,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:24,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-21 13:21:24,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856067920] [2021-08-21 13:21:24,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:21:24,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:24,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:21:24,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:21:24,340 INFO L87 Difference]: Start difference. First operand 1773 states and 5189 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:25,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:25,087 INFO L93 Difference]: Finished difference Result 2250 states and 6433 transitions. [2021-08-21 13:21:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:21:25,087 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 13:21:25,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:25,091 INFO L225 Difference]: With dead ends: 2250 [2021-08-21 13:21:25,091 INFO L226 Difference]: Without dead ends: 2235 [2021-08-21 13:21:25,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 679.6ms TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:21:25,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2021-08-21 13:21:25,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1752. [2021-08-21 13:21:25,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-08-21 13:21:25,116 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-08-21 13:21:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:25,116 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-08-21 13:21:25,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-08-21 13:21:25,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:25,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:25,120 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, 1, 1, 1, 1] [2021-08-21 13:21:25,140 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 13:21:25,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:25,321 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1441716885, now seen corresponding path program 17 times [2021-08-21 13:21:25,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:25,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931999573] [2021-08-21 13:21:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:25,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:25,616 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 13:21:25,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:25,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931999573] [2021-08-21 13:21:25,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931999573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:25,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534390801] [2021-08-21 13:21:25,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:21:25,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:25,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:25,618 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 13:21:25,618 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 13:21:26,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:21:26,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:26,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:21:26,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:27,326 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 13:21:27,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534390801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:27,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:27,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-21 13:21:27,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110676839] [2021-08-21 13:21:27,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:21:27,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:27,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:21:27,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:21:27,328 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:27,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:27,983 INFO L93 Difference]: Finished difference Result 2615 states and 7540 transitions. [2021-08-21 13:21:27,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:21:27,983 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 13:21:27,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:27,987 INFO L225 Difference]: With dead ends: 2615 [2021-08-21 13:21:27,987 INFO L226 Difference]: Without dead ends: 2596 [2021-08-21 13:21:27,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 602.1ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:21:27,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-08-21 13:21:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1760. [2021-08-21 13:21:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 2.920977828311541) internal successors, (5138), 1759 states have internal predecessors, (5138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 5138 transitions. [2021-08-21 13:21:28,018 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 5138 transitions. Word has length 33 [2021-08-21 13:21:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:28,018 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 5138 transitions. [2021-08-21 13:21:28,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:28,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 5138 transitions. [2021-08-21 13:21:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:28,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:28,022 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, 1, 1, 1, 1] [2021-08-21 13:21:28,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-21 13:21:28,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:28,237 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:28,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:28,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1977067947, now seen corresponding path program 18 times [2021-08-21 13:21:28,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:28,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600349680] [2021-08-21 13:21:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:28,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:28,529 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 13:21:28,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:28,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600349680] [2021-08-21 13:21:28,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600349680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:28,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656609919] [2021-08-21 13:21:28,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:21:28,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:28,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:28,531 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 13:21:28,549 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 13:21:29,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:21:29,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:29,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:21:29,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:30,034 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 5 treesize of output 3 [2021-08-21 13:21:30,500 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 13:21:30,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656609919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:30,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:30,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:21:30,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885850085] [2021-08-21 13:21:30,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:21:30,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:30,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:21:30,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:21:30,502 INFO L87 Difference]: Start difference. First operand 1760 states and 5138 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:31,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:31,685 INFO L93 Difference]: Finished difference Result 2325 states and 6704 transitions. [2021-08-21 13:21:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:21:31,685 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:21:31,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:31,689 INFO L225 Difference]: With dead ends: 2325 [2021-08-21 13:21:31,689 INFO L226 Difference]: Without dead ends: 2310 [2021-08-21 13:21:31,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1109.2ms TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:21:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-08-21 13:21:31,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1752. [2021-08-21 13:21:31,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-08-21 13:21:31,719 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-08-21 13:21:31,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:31,719 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-08-21 13:21:31,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:31,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-08-21 13:21:31,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:31,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:31,723 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, 1, 1, 1, 1] [2021-08-21 13:21:31,748 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 13:21:31,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:31,941 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:31,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:31,941 INFO L82 PathProgramCache]: Analyzing trace with hash -703095831, now seen corresponding path program 19 times [2021-08-21 13:21:31,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:31,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896686027] [2021-08-21 13:21:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:31,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:32,214 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 13:21:32,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:32,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896686027] [2021-08-21 13:21:32,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896686027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:32,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316114194] [2021-08-21 13:21:32,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:21:32,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:32,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:32,215 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 13:21:32,218 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 13:21:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:33,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:21:33,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:34,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316114194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:34,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:34,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-21 13:21:34,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681109385] [2021-08-21 13:21:34,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:21:34,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:34,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:21:34,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:21:34,128 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:35,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:35,239 INFO L93 Difference]: Finished difference Result 2455 states and 6989 transitions. [2021-08-21 13:21:35,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:21:35,239 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 13:21:35,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:35,242 INFO L225 Difference]: With dead ends: 2455 [2021-08-21 13:21:35,242 INFO L226 Difference]: Without dead ends: 2440 [2021-08-21 13:21:35,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 977.5ms TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 13:21:35,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-08-21 13:21:35,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1794. [2021-08-21 13:21:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 2.92526491912995) internal successors, (5245), 1793 states have internal predecessors, (5245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:35,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 5245 transitions. [2021-08-21 13:21:35,270 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 5245 transitions. Word has length 33 [2021-08-21 13:21:35,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:35,271 INFO L470 AbstractCegarLoop]: Abstraction has 1794 states and 5245 transitions. [2021-08-21 13:21:35,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:35,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 5245 transitions. [2021-08-21 13:21:35,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:35,274 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:35,274 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, 1, 1, 1, 1] [2021-08-21 13:21:35,304 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 13:21:35,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:35,493 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:35,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:35,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1925472879, now seen corresponding path program 20 times [2021-08-21 13:21:35,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:35,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597210221] [2021-08-21 13:21:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:35,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:35,761 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 13:21:35,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:35,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597210221] [2021-08-21 13:21:35,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597210221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:35,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305639048] [2021-08-21 13:21:35,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:21:35,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:35,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:35,762 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 13:21:35,767 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 13:21:37,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:21:37,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:37,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:21:37,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:37,473 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 5 treesize of output 3 [2021-08-21 13:21:37,880 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 13:21:37,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305639048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:37,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:37,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:21:37,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983490353] [2021-08-21 13:21:37,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:21:37,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:37,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:21:37,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:21:37,882 INFO L87 Difference]: Start difference. First operand 1794 states and 5245 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:38,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:38,540 INFO L93 Difference]: Finished difference Result 2707 states and 7767 transitions. [2021-08-21 13:21:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:21:38,541 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:21:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:38,545 INFO L225 Difference]: With dead ends: 2707 [2021-08-21 13:21:38,545 INFO L226 Difference]: Without dead ends: 2692 [2021-08-21 13:21:38,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 704.3ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:21:38,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2021-08-21 13:21:38,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 1752. [2021-08-21 13:21:38,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-08-21 13:21:38,571 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-08-21 13:21:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:38,571 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-08-21 13:21:38,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:38,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-08-21 13:21:38,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:38,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:38,574 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, 1, 1, 1, 1] [2021-08-21 13:21:38,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-21 13:21:38,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 13:21:38,777 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:38,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:38,778 INFO L82 PathProgramCache]: Analyzing trace with hash 503592163, now seen corresponding path program 21 times [2021-08-21 13:21:38,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:38,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209759074] [2021-08-21 13:21:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:38,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:39,102 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 13:21:39,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:39,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209759074] [2021-08-21 13:21:39,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209759074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:39,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307591038] [2021-08-21 13:21:39,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:21:39,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:39,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:39,104 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 13:21:39,104 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 13:21:40,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:21:40,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:40,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:21:40,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:40,829 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 5 treesize of output 3 [2021-08-21 13:21:41,242 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 13:21:41,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307591038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:41,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:41,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:21:41,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395496339] [2021-08-21 13:21:41,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:21:41,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:41,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:21:41,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:21:41,243 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:41,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:41,876 INFO L93 Difference]: Finished difference Result 2749 states and 7883 transitions. [2021-08-21 13:21:41,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:21:41,877 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:21:41,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:41,881 INFO L225 Difference]: With dead ends: 2749 [2021-08-21 13:21:41,881 INFO L226 Difference]: Without dead ends: 2730 [2021-08-21 13:21:41,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 644.9ms TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:21:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2021-08-21 13:21:41,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 1756. [2021-08-21 13:21:41,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 2.920797720797721) internal successors, (5126), 1755 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:41,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 5126 transitions. [2021-08-21 13:21:41,906 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 5126 transitions. Word has length 33 [2021-08-21 13:21:41,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:41,907 INFO L470 AbstractCegarLoop]: Abstraction has 1756 states and 5126 transitions. [2021-08-21 13:21:41,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:41,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 5126 transitions. [2021-08-21 13:21:41,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:41,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:41,909 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, 1, 1, 1, 1] [2021-08-21 13:21:41,929 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 13:21:42,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 13:21:42,111 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:42,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1379774627, now seen corresponding path program 22 times [2021-08-21 13:21:42,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:42,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226457881] [2021-08-21 13:21:42,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:42,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:42,433 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 13:21:42,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:42,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226457881] [2021-08-21 13:21:42,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226457881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:42,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410577928] [2021-08-21 13:21:42,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:21:42,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:42,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:42,435 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 13:21:42,455 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 13:21:43,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:21:43,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:43,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:21:43,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:44,563 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 13:21:44,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410577928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:44,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:44,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-21 13:21:44,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771801806] [2021-08-21 13:21:44,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:21:44,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:44,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:21:44,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:21:44,564 INFO L87 Difference]: Start difference. First operand 1756 states and 5126 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:45,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:45,528 INFO L93 Difference]: Finished difference Result 2323 states and 6662 transitions. [2021-08-21 13:21:45,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:21:45,529 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 13:21:45,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:45,533 INFO L225 Difference]: With dead ends: 2323 [2021-08-21 13:21:45,533 INFO L226 Difference]: Without dead ends: 2308 [2021-08-21 13:21:45,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 834.8ms TimeCoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:21:45,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-08-21 13:21:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1744. [2021-08-21 13:21:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 2.919104991394148) internal successors, (5088), 1743 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 5088 transitions. [2021-08-21 13:21:45,557 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 5088 transitions. Word has length 33 [2021-08-21 13:21:45,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:45,557 INFO L470 AbstractCegarLoop]: Abstraction has 1744 states and 5088 transitions. [2021-08-21 13:21:45,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:45,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 5088 transitions. [2021-08-21 13:21:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:45,559 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:45,559 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, 1, 1, 1, 1] [2021-08-21 13:21:45,579 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 13:21:45,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:45,760 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:45,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:45,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1508202277, now seen corresponding path program 23 times [2021-08-21 13:21:45,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:45,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747697061] [2021-08-21 13:21:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:45,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:46,087 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 13:21:46,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:46,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747697061] [2021-08-21 13:21:46,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747697061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:46,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891091224] [2021-08-21 13:21:46,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:21:46,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:46,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:46,088 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 13:21:46,109 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 13:21:47,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:21:47,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:47,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:21:47,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:48,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891091224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:48,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:48,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-21 13:21:48,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251812822] [2021-08-21 13:21:48,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:21:48,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:48,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:21:48,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:21:48,258 INFO L87 Difference]: Start difference. First operand 1744 states and 5088 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:49,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:49,174 INFO L93 Difference]: Finished difference Result 2266 states and 6481 transitions. [2021-08-21 13:21:49,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:21:49,174 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 13:21:49,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:49,178 INFO L225 Difference]: With dead ends: 2266 [2021-08-21 13:21:49,178 INFO L226 Difference]: Without dead ends: 2251 [2021-08-21 13:21:49,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 858.8ms TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:21:49,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-08-21 13:21:49,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1765. [2021-08-21 13:21:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 2.9280045351473922) internal successors, (5165), 1764 states have internal predecessors, (5165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:49,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 5165 transitions. [2021-08-21 13:21:49,203 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 5165 transitions. Word has length 33 [2021-08-21 13:21:49,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:49,203 INFO L470 AbstractCegarLoop]: Abstraction has 1765 states and 5165 transitions. [2021-08-21 13:21:49,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:49,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 5165 transitions. [2021-08-21 13:21:49,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:49,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:49,206 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, 1, 1, 1, 1] [2021-08-21 13:21:49,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-21 13:21:49,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:49,407 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:49,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:49,407 INFO L82 PathProgramCache]: Analyzing trace with hash -158196309, now seen corresponding path program 24 times [2021-08-21 13:21:49,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:49,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364158430] [2021-08-21 13:21:49,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:49,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:49,658 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 13:21:49,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:49,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364158430] [2021-08-21 13:21:49,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364158430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:49,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77513093] [2021-08-21 13:21:49,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:21:49,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:49,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:49,659 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 13:21:49,660 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 13:21:51,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:21:51,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:51,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:21:51,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:51,973 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 13:21:51,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77513093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:51,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:51,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:21:51,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598855950] [2021-08-21 13:21:51,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:21:51,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:51,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:21:51,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:21:51,974 INFO L87 Difference]: Start difference. First operand 1765 states and 5165 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:52,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:52,779 INFO L93 Difference]: Finished difference Result 2604 states and 7487 transitions. [2021-08-21 13:21:52,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:21:52,779 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:21:52,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:52,783 INFO L225 Difference]: With dead ends: 2604 [2021-08-21 13:21:52,783 INFO L226 Difference]: Without dead ends: 2589 [2021-08-21 13:21:52,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 702.4ms TimeCoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:21:52,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2021-08-21 13:21:52,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 1702. [2021-08-21 13:21:52,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 2.9253380364491477) internal successors, (4976), 1701 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:52,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 4976 transitions. [2021-08-21 13:21:52,815 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 4976 transitions. Word has length 33 [2021-08-21 13:21:52,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:52,815 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 4976 transitions. [2021-08-21 13:21:52,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:52,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 4976 transitions. [2021-08-21 13:21:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:52,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:52,819 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, 1, 1, 1, 1] [2021-08-21 13:21:52,849 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 13:21:53,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 13:21:53,036 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:53,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:53,036 INFO L82 PathProgramCache]: Analyzing trace with hash 758312315, now seen corresponding path program 25 times [2021-08-21 13:21:53,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:53,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906864225] [2021-08-21 13:21:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:53,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:53,335 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 13:21:53,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:53,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906864225] [2021-08-21 13:21:53,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906864225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:53,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205634306] [2021-08-21 13:21:53,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:21:53,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:53,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:53,345 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 13:21:53,348 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 13:21:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:55,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:21:55,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:55,602 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 13:21:55,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205634306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:55,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:55,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-21 13:21:55,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827260932] [2021-08-21 13:21:55,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 13:21:55,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:55,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 13:21:55,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:21:55,603 INFO L87 Difference]: Start difference. First operand 1702 states and 4976 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:56,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:56,309 INFO L93 Difference]: Finished difference Result 3133 states and 8917 transitions. [2021-08-21 13:21:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:21:56,309 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:21:56,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:56,314 INFO L225 Difference]: With dead ends: 3133 [2021-08-21 13:21:56,314 INFO L226 Difference]: Without dead ends: 3118 [2021-08-21 13:21:56,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 758.2ms TimeCoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:21:56,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2021-08-21 13:21:56,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 1726. [2021-08-21 13:21:56,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 2.926376811594203) internal successors, (5048), 1725 states have internal predecessors, (5048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:56,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 5048 transitions. [2021-08-21 13:21:56,342 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 5048 transitions. Word has length 33 [2021-08-21 13:21:56,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:56,342 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 5048 transitions. [2021-08-21 13:21:56,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:56,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 5048 transitions. [2021-08-21 13:21:56,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:21:56,345 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:56,345 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, 1, 1, 1, 1] [2021-08-21 13:21:56,369 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 13:21:56,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 13:21:56,546 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:56,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:56,546 INFO L82 PathProgramCache]: Analyzing trace with hash -10419781, now seen corresponding path program 26 times [2021-08-21 13:21:56,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:56,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500571774] [2021-08-21 13:21:56,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:56,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:56,883 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 13:21:56,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:56,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500571774] [2021-08-21 13:21:56,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500571774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:56,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381595335] [2021-08-21 13:21:56,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:21:56,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:56,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:56,885 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:21:56,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 13:21:58,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:21:58,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:58,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:21:58,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:58,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-21 13:21:59,308 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 13:21:59,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381595335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:59,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:59,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:21:59,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709867555] [2021-08-21 13:21:59,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:21:59,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:59,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:21:59,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:21:59,309 INFO L87 Difference]: Start difference. First operand 1726 states and 5048 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:59,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:59,998 INFO L93 Difference]: Finished difference Result 2450 states and 7097 transitions. [2021-08-21 13:21:59,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:21:59,998 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:21:59,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:00,002 INFO L225 Difference]: With dead ends: 2450 [2021-08-21 13:22:00,002 INFO L226 Difference]: Without dead ends: 2431 [2021-08-21 13:22:00,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 587.7ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:22:00,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-08-21 13:22:00,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1738. [2021-08-21 13:22:00,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 2.9280368451352907) internal successors, (5086), 1737 states have internal predecessors, (5086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 5086 transitions. [2021-08-21 13:22:00,036 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 5086 transitions. Word has length 33 [2021-08-21 13:22:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:00,036 INFO L470 AbstractCegarLoop]: Abstraction has 1738 states and 5086 transitions. [2021-08-21 13:22:00,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:00,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 5086 transitions. [2021-08-21 13:22:00,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:22:00,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:00,039 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, 1, 1, 1, 1] [2021-08-21 13:22:00,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:00,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 13:22:00,261 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:00,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:00,261 INFO L82 PathProgramCache]: Analyzing trace with hash 865762683, now seen corresponding path program 27 times [2021-08-21 13:22:00,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:00,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166420792] [2021-08-21 13:22:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:00,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:00,664 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 13:22:00,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:00,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166420792] [2021-08-21 13:22:00,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166420792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:00,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693006834] [2021-08-21 13:22:00,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:22:00,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:00,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:00,666 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:00,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 13:22:02,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:22:02,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:02,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:22:02,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:02,818 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 5 treesize of output 3 [2021-08-21 13:22:03,211 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 13:22:03,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693006834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:03,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:03,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:22:03,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001418298] [2021-08-21 13:22:03,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:22:03,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:03,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:22:03,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:22:03,212 INFO L87 Difference]: Start difference. First operand 1738 states and 5086 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:04,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:04,122 INFO L93 Difference]: Finished difference Result 2236 states and 6437 transitions. [2021-08-21 13:22:04,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:22:04,122 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:22:04,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:04,126 INFO L225 Difference]: With dead ends: 2236 [2021-08-21 13:22:04,126 INFO L226 Difference]: Without dead ends: 2221 [2021-08-21 13:22:04,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 809.5ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:22:04,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-08-21 13:22:04,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1734. [2021-08-21 13:22:04,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 2.9267166762839008) internal successors, (5072), 1733 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5072 transitions. [2021-08-21 13:22:04,149 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5072 transitions. Word has length 33 [2021-08-21 13:22:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:04,150 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 5072 transitions. [2021-08-21 13:22:04,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:04,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5072 transitions. [2021-08-21 13:22:04,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:22:04,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:04,152 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, 1, 1, 1, 1] [2021-08-21 13:22:04,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:04,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:04,354 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:04,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:04,354 INFO L82 PathProgramCache]: Analyzing trace with hash 131295359, now seen corresponding path program 28 times [2021-08-21 13:22:04,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:04,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667907913] [2021-08-21 13:22:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:04,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:04,650 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 13:22:04,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:04,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667907913] [2021-08-21 13:22:04,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667907913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:04,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615549739] [2021-08-21 13:22:04,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:22:04,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:04,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:04,651 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:04,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 13:22:06,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:22:06,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:06,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:22:06,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:07,147 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 13:22:07,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615549739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:07,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:07,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-21 13:22:07,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951256036] [2021-08-21 13:22:07,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 13:22:07,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:07,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 13:22:07,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:22:07,148 INFO L87 Difference]: Start difference. First operand 1734 states and 5072 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:07,981 INFO L93 Difference]: Finished difference Result 3027 states and 8657 transitions. [2021-08-21 13:22:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:22:07,981 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:22:07,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:07,986 INFO L225 Difference]: With dead ends: 3027 [2021-08-21 13:22:07,986 INFO L226 Difference]: Without dead ends: 3012 [2021-08-21 13:22:07,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 806.4ms TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:22:07,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-08-21 13:22:08,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 1730. [2021-08-21 13:22:08,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.926547137073453) internal successors, (5060), 1729 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5060 transitions. [2021-08-21 13:22:08,021 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5060 transitions. Word has length 33 [2021-08-21 13:22:08,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:08,021 INFO L470 AbstractCegarLoop]: Abstraction has 1730 states and 5060 transitions. [2021-08-21 13:22:08,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:08,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5060 transitions. [2021-08-21 13:22:08,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:22:08,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:08,024 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, 1, 1, 1, 1] [2021-08-21 13:22:08,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:08,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:08,241 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:08,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1151852101, now seen corresponding path program 29 times [2021-08-21 13:22:08,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:08,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977759867] [2021-08-21 13:22:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:08,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:08,546 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 13:22:08,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:08,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977759867] [2021-08-21 13:22:08,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977759867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:08,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328049729] [2021-08-21 13:22:08,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:22:08,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:08,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:08,548 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:08,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 13:22:10,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:22:10,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:10,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:22:10,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:11,091 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 13:22:11,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328049729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:11,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:11,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-21 13:22:11,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987772655] [2021-08-21 13:22:11,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 13:22:11,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:11,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 13:22:11,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:22:11,092 INFO L87 Difference]: Start difference. First operand 1730 states and 5060 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:11,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:11,907 INFO L93 Difference]: Finished difference Result 3089 states and 8805 transitions. [2021-08-21 13:22:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:22:11,908 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:22:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:11,913 INFO L225 Difference]: With dead ends: 3089 [2021-08-21 13:22:11,913 INFO L226 Difference]: Without dead ends: 3074 [2021-08-21 13:22:11,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 774.2ms TimeCoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 13:22:11,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-08-21 13:22:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 1710. [2021-08-21 13:22:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 2.925687536571094) internal successors, (5000), 1709 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5000 transitions. [2021-08-21 13:22:11,949 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5000 transitions. Word has length 33 [2021-08-21 13:22:11,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:11,949 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 5000 transitions. [2021-08-21 13:22:11,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:11,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5000 transitions. [2021-08-21 13:22:11,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:22:11,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:11,953 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, 1, 1, 1, 1] [2021-08-21 13:22:11,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:12,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:12,169 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:12,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:12,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1721940609, now seen corresponding path program 30 times [2021-08-21 13:22:12,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:12,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488443425] [2021-08-21 13:22:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:12,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:12,477 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 13:22:12,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:12,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488443425] [2021-08-21 13:22:12,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488443425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:12,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863749998] [2021-08-21 13:22:12,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:22:12,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:12,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:12,478 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:12,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 13:22:14,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:22:14,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:14,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:22:14,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:14,957 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 5 treesize of output 3 [2021-08-21 13:22:15,233 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 13:22:15,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863749998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:15,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:15,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 13:22:15,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332439908] [2021-08-21 13:22:15,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:22:15,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:15,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:22:15,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:22:15,234 INFO L87 Difference]: Start difference. First operand 1710 states and 5000 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 13:22:15,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:15,797 INFO L93 Difference]: Finished difference Result 2950 states and 8450 transitions. [2021-08-21 13:22:15,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:22:15,797 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 33 [2021-08-21 13:22:15,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:15,802 INFO L225 Difference]: With dead ends: 2950 [2021-08-21 13:22:15,802 INFO L226 Difference]: Without dead ends: 2935 [2021-08-21 13:22:15,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 588.7ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:22:15,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2021-08-21 13:22:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 1731. [2021-08-21 13:22:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 2.921387283236994) internal successors, (5054), 1730 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:15,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 5054 transitions. [2021-08-21 13:22:15,829 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 5054 transitions. Word has length 33 [2021-08-21 13:22:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:15,829 INFO L470 AbstractCegarLoop]: Abstraction has 1731 states and 5054 transitions. [2021-08-21 13:22:15,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 13:22:15,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 5054 transitions. [2021-08-21 13:22:15,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:22:15,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:15,832 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, 1, 1, 1, 1] [2021-08-21 13:22:15,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-21 13:22:16,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 13:22:16,048 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:16,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:16,049 INFO L82 PathProgramCache]: Analyzing trace with hash -485112675, now seen corresponding path program 31 times [2021-08-21 13:22:16,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:16,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653451349] [2021-08-21 13:22:16,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:16,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:16,336 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 13:22:16,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:16,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653451349] [2021-08-21 13:22:16,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653451349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:16,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830931228] [2021-08-21 13:22:16,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:22:16,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:16,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:16,338 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:16,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 13:22:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:18,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:22:18,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:19,038 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 13:22:19,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830931228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:19,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:19,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-21 13:22:19,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114604278] [2021-08-21 13:22:19,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 13:22:19,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:19,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 13:22:19,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:22:19,039 INFO L87 Difference]: Start difference. First operand 1731 states and 5054 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:19,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:19,814 INFO L93 Difference]: Finished difference Result 3320 states and 9395 transitions. [2021-08-21 13:22:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:22:19,814 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:22:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:19,819 INFO L225 Difference]: With dead ends: 3320 [2021-08-21 13:22:19,819 INFO L226 Difference]: Without dead ends: 3305 [2021-08-21 13:22:19,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 723.2ms TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:22:19,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3305 states. [2021-08-21 13:22:19,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3305 to 1768. [2021-08-21 13:22:19,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 2.9134125636672326) internal successors, (5148), 1767 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5148 transitions. [2021-08-21 13:22:19,853 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5148 transitions. Word has length 33 [2021-08-21 13:22:19,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:19,853 INFO L470 AbstractCegarLoop]: Abstraction has 1768 states and 5148 transitions. [2021-08-21 13:22:19,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5148 transitions. [2021-08-21 13:22:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:22:19,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:19,857 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, 1, 1, 1, 1] [2021-08-21 13:22:19,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:20,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:20,073 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:20,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:20,073 INFO L82 PathProgramCache]: Analyzing trace with hash 68792961, now seen corresponding path program 32 times [2021-08-21 13:22:20,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:20,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972369746] [2021-08-21 13:22:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:20,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:20,368 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 13:22:20,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:20,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972369746] [2021-08-21 13:22:20,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972369746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:20,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011752982] [2021-08-21 13:22:20,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:22:20,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:20,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:20,369 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:20,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 13:22:22,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:22:22,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:22,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:22:22,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:23,001 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 5 treesize of output 3 [2021-08-21 13:22:23,286 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 13:22:23,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011752982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:23,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:23,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:22:23,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090181620] [2021-08-21 13:22:23,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:22:23,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:23,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:22:23,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:22:23,287 INFO L87 Difference]: Start difference. First operand 1768 states and 5148 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:23,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:23,908 INFO L93 Difference]: Finished difference Result 3021 states and 8616 transitions. [2021-08-21 13:22:23,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:22:23,908 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:22:23,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:23,913 INFO L225 Difference]: With dead ends: 3021 [2021-08-21 13:22:23,913 INFO L226 Difference]: Without dead ends: 3006 [2021-08-21 13:22:23,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 616.6ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:22:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2021-08-21 13:22:23,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 1852. [2021-08-21 13:22:23,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.902215018908698) internal successors, (5372), 1851 states have internal predecessors, (5372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 5372 transitions. [2021-08-21 13:22:23,939 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 5372 transitions. Word has length 33 [2021-08-21 13:22:23,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:23,939 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 5372 transitions. [2021-08-21 13:22:23,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:23,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 5372 transitions. [2021-08-21 13:22:23,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:22:23,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:23,942 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, 1, 1, 1, 1] [2021-08-21 13:22:23,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:24,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:24,142 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:24,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:24,143 INFO L82 PathProgramCache]: Analyzing trace with hash 226317897, now seen corresponding path program 33 times [2021-08-21 13:22:24,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:24,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947209360] [2021-08-21 13:22:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:24,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:24,439 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 13:22:24,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:24,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947209360] [2021-08-21 13:22:24,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947209360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:24,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165387276] [2021-08-21 13:22:24,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:22:24,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:24,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:24,440 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:24,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 13:22:26,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:22:26,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:26,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:22:26,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:27,017 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 5 treesize of output 3 [2021-08-21 13:22:27,472 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 13:22:27,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165387276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:27,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:27,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:22:27,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908677626] [2021-08-21 13:22:27,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:22:27,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:27,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:22:27,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:22:27,473 INFO L87 Difference]: Start difference. First operand 1852 states and 5372 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:28,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:28,349 INFO L93 Difference]: Finished difference Result 2567 states and 7275 transitions. [2021-08-21 13:22:28,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:22:28,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:22:28,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:28,354 INFO L225 Difference]: With dead ends: 2567 [2021-08-21 13:22:28,354 INFO L226 Difference]: Without dead ends: 2552 [2021-08-21 13:22:28,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 855.6ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:22:28,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-08-21 13:22:28,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 1915. [2021-08-21 13:22:28,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.9054336468129573) internal successors, (5561), 1914 states have internal predecessors, (5561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5561 transitions. [2021-08-21 13:22:28,383 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5561 transitions. Word has length 33 [2021-08-21 13:22:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:28,384 INFO L470 AbstractCegarLoop]: Abstraction has 1915 states and 5561 transitions. [2021-08-21 13:22:28,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:28,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5561 transitions. [2021-08-21 13:22:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:22:28,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:28,387 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, 1, 1, 1, 1] [2021-08-21 13:22:28,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:28,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 13:22:28,588 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:28,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:28,589 INFO L82 PathProgramCache]: Analyzing trace with hash -2440947, now seen corresponding path program 34 times [2021-08-21 13:22:28,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:28,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018495569] [2021-08-21 13:22:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:28,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:28,918 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 13:22:28,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:28,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018495569] [2021-08-21 13:22:28,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018495569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:28,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062532015] [2021-08-21 13:22:28,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:22:28,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:28,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:28,919 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:28,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 13:22:31,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:22:31,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:31,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:22:31,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:31,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062532015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:31,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:31,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-21 13:22:31,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535445986] [2021-08-21 13:22:31,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 13:22:31,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:31,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 13:22:31,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:22:31,862 INFO L87 Difference]: Start difference. First operand 1915 states and 5561 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:32,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:32,488 INFO L93 Difference]: Finished difference Result 3010 states and 8552 transitions. [2021-08-21 13:22:32,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:22:32,489 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:22:32,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:32,493 INFO L225 Difference]: With dead ends: 3010 [2021-08-21 13:22:32,493 INFO L226 Difference]: Without dead ends: 2995 [2021-08-21 13:22:32,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 731.9ms TimeCoverageRelationStatistics Valid=176, Invalid=1014, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:22:32,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-08-21 13:22:32,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 1894. [2021-08-21 13:22:32,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 2.8969889064976226) internal successors, (5484), 1893 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 5484 transitions. [2021-08-21 13:22:32,521 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 5484 transitions. Word has length 33 [2021-08-21 13:22:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:32,521 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 5484 transitions. [2021-08-21 13:22:32,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 5484 transitions. [2021-08-21 13:22:32,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:22:32,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:32,524 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, 1, 1, 1, 1] [2021-08-21 13:22:32,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:32,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 13:22:32,724 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:32,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:32,725 INFO L82 PathProgramCache]: Analyzing trace with hash -949172747, now seen corresponding path program 35 times [2021-08-21 13:22:32,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:32,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513053572] [2021-08-21 13:22:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:32,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:33,034 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 13:22:33,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:33,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513053572] [2021-08-21 13:22:33,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513053572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:33,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086111288] [2021-08-21 13:22:33,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:22:33,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:33,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:33,035 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:33,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 13:22:35,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:22:35,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:35,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:22:35,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:36,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086111288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:36,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:36,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-21 13:22:36,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623644457] [2021-08-21 13:22:36,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 13:22:36,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:36,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 13:22:36,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:22:36,106 INFO L87 Difference]: Start difference. First operand 1894 states and 5484 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:36,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:36,920 INFO L93 Difference]: Finished difference Result 3039 states and 8670 transitions. [2021-08-21 13:22:36,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:22:36,920 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:22:36,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:36,925 INFO L225 Difference]: With dead ends: 3039 [2021-08-21 13:22:36,925 INFO L226 Difference]: Without dead ends: 3024 [2021-08-21 13:22:36,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 778.2ms TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 13:22:36,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2021-08-21 13:22:36,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 1873. [2021-08-21 13:22:36,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 2.8995726495726495) internal successors, (5428), 1872 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 5428 transitions. [2021-08-21 13:22:36,953 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 5428 transitions. Word has length 33 [2021-08-21 13:22:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:36,954 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 5428 transitions. [2021-08-21 13:22:36,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:36,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 5428 transitions. [2021-08-21 13:22:36,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:22:36,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:36,957 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, 1, 1, 1, 1] [2021-08-21 13:22:36,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:37,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 13:22:37,174 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:37,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:37,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1103610265, now seen corresponding path program 36 times [2021-08-21 13:22:37,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:37,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527147963] [2021-08-21 13:22:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:37,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:37,483 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 13:22:37,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:37,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527147963] [2021-08-21 13:22:37,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527147963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:37,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601778671] [2021-08-21 13:22:37,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:22:37,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:37,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:37,485 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:37,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 13:22:39,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:22:39,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:39,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:22:39,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:40,244 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 5 treesize of output 3 [2021-08-21 13:22:40,701 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 13:22:40,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601778671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:40,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:40,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:22:40,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066875842] [2021-08-21 13:22:40,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:22:40,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:40,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:22:40,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:22:40,703 INFO L87 Difference]: Start difference. First operand 1873 states and 5428 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:41,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:41,342 INFO L93 Difference]: Finished difference Result 2990 states and 8536 transitions. [2021-08-21 13:22:41,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:22:41,343 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:22:41,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:41,348 INFO L225 Difference]: With dead ends: 2990 [2021-08-21 13:22:41,348 INFO L226 Difference]: Without dead ends: 2975 [2021-08-21 13:22:41,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 655.6ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:22:41,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2021-08-21 13:22:41,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 1768. [2021-08-21 13:22:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 2.9134125636672326) internal successors, (5148), 1767 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:41,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5148 transitions. [2021-08-21 13:22:41,375 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5148 transitions. Word has length 33 [2021-08-21 13:22:41,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:41,375 INFO L470 AbstractCegarLoop]: Abstraction has 1768 states and 5148 transitions. [2021-08-21 13:22:41,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5148 transitions. [2021-08-21 13:22:41,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:22:41,378 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:41,378 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, 1, 1, 1, 1] [2021-08-21 13:22:41,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-21 13:22:41,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 13:22:41,578 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:41,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:41,579 INFO L82 PathProgramCache]: Analyzing trace with hash 603202051, now seen corresponding path program 37 times [2021-08-21 13:22:41,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:41,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465930896] [2021-08-21 13:22:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:41,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:41,867 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 13:22:41,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:41,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465930896] [2021-08-21 13:22:41,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465930896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:41,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530503429] [2021-08-21 13:22:41,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:22:41,868 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:41,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:41,873 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:41,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 13:22:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:44,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:22:44,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:45,015 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 13:22:45,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530503429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:45,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:45,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-21 13:22:45,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800326716] [2021-08-21 13:22:45,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:22:45,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:45,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:22:45,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:22:45,016 INFO L87 Difference]: Start difference. First operand 1768 states and 5148 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:45,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:45,584 INFO L93 Difference]: Finished difference Result 2915 states and 8366 transitions. [2021-08-21 13:22:45,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:22:45,584 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:22:45,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:45,589 INFO L225 Difference]: With dead ends: 2915 [2021-08-21 13:22:45,589 INFO L226 Difference]: Without dead ends: 2900 [2021-08-21 13:22:45,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 535.2ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:22:45,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2021-08-21 13:22:45,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 1844. [2021-08-21 13:22:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 2.921323928377645) internal successors, (5384), 1843 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 5384 transitions. [2021-08-21 13:22:45,616 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 5384 transitions. Word has length 33 [2021-08-21 13:22:45,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:45,616 INFO L470 AbstractCegarLoop]: Abstraction has 1844 states and 5384 transitions. [2021-08-21 13:22:45,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:45,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 5384 transitions. [2021-08-21 13:22:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:22:45,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:45,618 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, 1, 1, 1, 1] [2021-08-21 13:22:45,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-21 13:22:45,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 13:22:45,819 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:45,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:45,819 INFO L82 PathProgramCache]: Analyzing trace with hash -165530045, now seen corresponding path program 38 times [2021-08-21 13:22:45,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:45,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028147387] [2021-08-21 13:22:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:45,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:46,098 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 13:22:46,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:46,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028147387] [2021-08-21 13:22:46,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028147387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:46,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232448299] [2021-08-21 13:22:46,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:22:46,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:46,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:46,099 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:46,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 13:22:48,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:22:48,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:48,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:22:48,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:49,094 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 5 treesize of output 3 [2021-08-21 13:22:49,398 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 13:22:49,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232448299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:49,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:49,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:22:49,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739643227] [2021-08-21 13:22:49,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:22:49,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:49,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:22:49,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:22:49,400 INFO L87 Difference]: Start difference. First operand 1844 states and 5384 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:49,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:49,887 INFO L93 Difference]: Finished difference Result 2536 states and 7343 transitions. [2021-08-21 13:22:49,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:22:49,888 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 13:22:49,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:49,891 INFO L225 Difference]: With dead ends: 2536 [2021-08-21 13:22:49,891 INFO L226 Difference]: Without dead ends: 2517 [2021-08-21 13:22:49,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 477.8ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:22:49,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2021-08-21 13:22:49,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 1856. [2021-08-21 13:22:49,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 2.922911051212938) internal successors, (5422), 1855 states have internal predecessors, (5422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:49,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5422 transitions. [2021-08-21 13:22:49,914 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5422 transitions. Word has length 33 [2021-08-21 13:22:49,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:49,915 INFO L470 AbstractCegarLoop]: Abstraction has 1856 states and 5422 transitions. [2021-08-21 13:22:49,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:49,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5422 transitions. [2021-08-21 13:22:49,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:22:49,917 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:49,917 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, 1, 1, 1, 1] [2021-08-21 13:22:49,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:50,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-21 13:22:50,118 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:50,118 INFO L82 PathProgramCache]: Analyzing trace with hash 710652419, now seen corresponding path program 39 times [2021-08-21 13:22:50,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:50,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568943399] [2021-08-21 13:22:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:50,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:50,419 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 13:22:50,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:50,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568943399] [2021-08-21 13:22:50,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568943399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:50,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083631949] [2021-08-21 13:22:50,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:22:50,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:50,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:50,421 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:50,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 13:22:53,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:22:53,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:53,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:22:53,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:53,523 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 5 treesize of output 3 [2021-08-21 13:22:53,887 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 13:22:53,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083631949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:53,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:53,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:22:53,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408878699] [2021-08-21 13:22:53,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:22:53,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:53,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:22:53,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:22:53,888 INFO L87 Difference]: Start difference. First operand 1856 states and 5422 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:54,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:54,646 INFO L93 Difference]: Finished difference Result 2313 states and 6653 transitions. [2021-08-21 13:22:54,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:22:54,646 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 13:22:54,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:54,651 INFO L225 Difference]: With dead ends: 2313 [2021-08-21 13:22:54,651 INFO L226 Difference]: Without dead ends: 2298 [2021-08-21 13:22:54,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 707.0ms TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:22:54,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-08-21 13:22:54,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1852. [2021-08-21 13:22:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.921663965424095) internal successors, (5408), 1851 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:54,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 5408 transitions. [2021-08-21 13:22:54,679 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 5408 transitions. Word has length 33 [2021-08-21 13:22:54,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:54,679 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 5408 transitions. [2021-08-21 13:22:54,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:54,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 5408 transitions. [2021-08-21 13:22:54,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:22:54,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:54,681 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, 1, 1, 1, 1] [2021-08-21 13:22:54,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:54,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 13:22:54,882 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:54,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:54,882 INFO L82 PathProgramCache]: Analyzing trace with hash -23814905, now seen corresponding path program 40 times [2021-08-21 13:22:54,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:54,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792507080] [2021-08-21 13:22:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:54,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:55,238 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 13:22:55,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:55,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792507080] [2021-08-21 13:22:55,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792507080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:55,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399893285] [2021-08-21 13:22:55,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:22:55,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:55,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:55,240 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:55,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 13:22:57,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:22:57,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:57,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:22:57,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:58,502 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 13:22:58,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399893285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:58,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:58,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-21 13:22:58,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902321761] [2021-08-21 13:22:58,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:22:58,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:58,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:22:58,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:22:58,504 INFO L87 Difference]: Start difference. First operand 1852 states and 5408 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:59,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:59,187 INFO L93 Difference]: Finished difference Result 3085 states and 8828 transitions. [2021-08-21 13:22:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:22:59,188 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:22:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:59,193 INFO L225 Difference]: With dead ends: 3085 [2021-08-21 13:22:59,193 INFO L226 Difference]: Without dead ends: 3070 [2021-08-21 13:22:59,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 618.9ms TimeCoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:22:59,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-08-21 13:22:59,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 1867. [2021-08-21 13:22:59,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 2.9217577706323685) internal successors, (5452), 1866 states have internal predecessors, (5452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 5452 transitions. [2021-08-21 13:22:59,233 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 5452 transitions. Word has length 33 [2021-08-21 13:22:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:59,234 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 5452 transitions. [2021-08-21 13:22:59,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 5452 transitions. [2021-08-21 13:22:59,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:22:59,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:59,236 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, 1, 1, 1, 1] [2021-08-21 13:22:59,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 13:22:59,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-21 13:22:59,437 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:59,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:59,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1306962365, now seen corresponding path program 41 times [2021-08-21 13:22:59,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:59,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983666733] [2021-08-21 13:22:59,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:59,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:59,710 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 13:22:59,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:59,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983666733] [2021-08-21 13:22:59,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983666733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:59,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493346301] [2021-08-21 13:22:59,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:22:59,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:59,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:59,711 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:59,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 13:23:02,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:23:02,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:02,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:23:02,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:03,084 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 13:23:03,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493346301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:03,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:03,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-21 13:23:03,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764414985] [2021-08-21 13:23:03,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:23:03,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:03,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:23:03,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:23:03,085 INFO L87 Difference]: Start difference. First operand 1867 states and 5452 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:03,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:03,749 INFO L93 Difference]: Finished difference Result 3084 states and 8813 transitions. [2021-08-21 13:23:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:23:03,749 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:23:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:03,754 INFO L225 Difference]: With dead ends: 3084 [2021-08-21 13:23:03,754 INFO L226 Difference]: Without dead ends: 3069 [2021-08-21 13:23:03,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 587.9ms TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:23:03,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-08-21 13:23:03,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1847. [2021-08-21 13:23:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 2.9209100758396533) internal successors, (5392), 1846 states have internal predecessors, (5392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 5392 transitions. [2021-08-21 13:23:03,780 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 5392 transitions. Word has length 33 [2021-08-21 13:23:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:03,780 INFO L470 AbstractCegarLoop]: Abstraction has 1847 states and 5392 transitions. [2021-08-21 13:23:03,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:03,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 5392 transitions. [2021-08-21 13:23:03,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:23:03,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:03,782 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, 1, 1, 1, 1] [2021-08-21 13:23:03,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:03,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:03,983 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:03,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:03,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1023381209, now seen corresponding path program 42 times [2021-08-21 13:23:03,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:03,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719407567] [2021-08-21 13:23:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:03,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:04,256 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 13:23:04,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:04,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719407567] [2021-08-21 13:23:04,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719407567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:04,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701646342] [2021-08-21 13:23:04,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:23:04,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:04,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:04,261 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:04,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 13:23:07,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:23:07,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:07,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:23:07,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:07,728 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 13:23:07,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701646342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:07,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:07,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:23:07,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314821571] [2021-08-21 13:23:07,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:23:07,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:07,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:23:07,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:23:07,729 INFO L87 Difference]: Start difference. First operand 1847 states and 5392 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 13:23:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:08,239 INFO L93 Difference]: Finished difference Result 2936 states and 8438 transitions. [2021-08-21 13:23:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:23:08,239 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 33 [2021-08-21 13:23:08,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:08,244 INFO L225 Difference]: With dead ends: 2936 [2021-08-21 13:23:08,244 INFO L226 Difference]: Without dead ends: 2921 [2021-08-21 13:23:08,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 494.1ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:23:08,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-08-21 13:23:08,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 1931. [2021-08-21 13:23:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.9098445595854923) internal successors, (5616), 1930 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:08,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5616 transitions. [2021-08-21 13:23:08,273 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5616 transitions. Word has length 33 [2021-08-21 13:23:08,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:08,273 INFO L470 AbstractCegarLoop]: Abstraction has 1931 states and 5616 transitions. [2021-08-21 13:23:08,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 13:23:08,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5616 transitions. [2021-08-21 13:23:08,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:23:08,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:08,275 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, 1, 1, 1, 1] [2021-08-21 13:23:08,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:08,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:08,476 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:08,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:08,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1059014257, now seen corresponding path program 43 times [2021-08-21 13:23:08,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:08,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73653327] [2021-08-21 13:23:08,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:08,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:08,778 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 13:23:08,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:08,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73653327] [2021-08-21 13:23:08,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73653327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:08,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442570569] [2021-08-21 13:23:08,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:23:08,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:08,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:08,781 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:08,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 13:23:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:11,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:23:11,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:12,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442570569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:12,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:12,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-21 13:23:12,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919410867] [2021-08-21 13:23:12,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:23:12,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:12,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:23:12,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:23:12,420 INFO L87 Difference]: Start difference. First operand 1931 states and 5616 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:13,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:13,235 INFO L93 Difference]: Finished difference Result 2621 states and 7460 transitions. [2021-08-21 13:23:13,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:23:13,236 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:23:13,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:13,240 INFO L225 Difference]: With dead ends: 2621 [2021-08-21 13:23:13,240 INFO L226 Difference]: Without dead ends: 2606 [2021-08-21 13:23:13,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 784.9ms TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:23:13,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-08-21 13:23:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1994. [2021-08-21 13:23:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 2.912694430506774) internal successors, (5805), 1993 states have internal predecessors, (5805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:13,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 5805 transitions. [2021-08-21 13:23:13,265 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 5805 transitions. Word has length 33 [2021-08-21 13:23:13,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:13,265 INFO L470 AbstractCegarLoop]: Abstraction has 1994 states and 5805 transitions. [2021-08-21 13:23:13,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:13,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 5805 transitions. [2021-08-21 13:23:13,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:23:13,267 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:13,267 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, 1, 1, 1, 1] [2021-08-21 13:23:13,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:13,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 13:23:13,468 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:13,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:13,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1287773101, now seen corresponding path program 44 times [2021-08-21 13:23:13,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:13,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514796298] [2021-08-21 13:23:13,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:13,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:13,763 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 13:23:13,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:13,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514796298] [2021-08-21 13:23:13,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514796298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:13,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854614367] [2021-08-21 13:23:13,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:23:13,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:13,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:13,769 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:13,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 13:23:16,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:23:16,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:16,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:23:16,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:17,138 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 5 treesize of output 3 [2021-08-21 13:23:17,468 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 13:23:17,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854614367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:17,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:17,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:23:17,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59475901] [2021-08-21 13:23:17,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:23:17,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:17,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:23:17,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:23:17,470 INFO L87 Difference]: Start difference. First operand 1994 states and 5805 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:17,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:17,984 INFO L93 Difference]: Finished difference Result 2645 states and 7641 transitions. [2021-08-21 13:23:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:23:17,984 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:23:17,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:17,988 INFO L225 Difference]: With dead ends: 2645 [2021-08-21 13:23:17,988 INFO L226 Difference]: Without dead ends: 2630 [2021-08-21 13:23:17,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 533.1ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:23:17,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2021-08-21 13:23:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 1973. [2021-08-21 13:23:18,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 2.9046653144016226) internal successors, (5728), 1972 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:18,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 5728 transitions. [2021-08-21 13:23:18,013 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 5728 transitions. Word has length 33 [2021-08-21 13:23:18,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:18,013 INFO L470 AbstractCegarLoop]: Abstraction has 1973 states and 5728 transitions. [2021-08-21 13:23:18,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 5728 transitions. [2021-08-21 13:23:18,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:23:18,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:18,016 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, 1, 1, 1, 1] [2021-08-21 13:23:18,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:18,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 13:23:18,216 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:18,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:18,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2060462395, now seen corresponding path program 45 times [2021-08-21 13:23:18,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:18,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686142797] [2021-08-21 13:23:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:18,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:18,581 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 13:23:18,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:18,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686142797] [2021-08-21 13:23:18,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686142797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:18,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844598614] [2021-08-21 13:23:18,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:23:18,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:18,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:18,582 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:18,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 13:23:21,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:23:21,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:21,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:23:21,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:21,902 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 5 treesize of output 3 [2021-08-21 13:23:22,257 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 13:23:22,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844598614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:22,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:22,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:23:22,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568613730] [2021-08-21 13:23:22,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:23:22,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:22,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:23:22,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:23:22,259 INFO L87 Difference]: Start difference. First operand 1973 states and 5728 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:22,796 INFO L93 Difference]: Finished difference Result 3095 states and 8859 transitions. [2021-08-21 13:23:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:23:22,796 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:23:22,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:22,800 INFO L225 Difference]: With dead ends: 3095 [2021-08-21 13:23:22,801 INFO L226 Difference]: Without dead ends: 3080 [2021-08-21 13:23:22,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 501.2ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:23:22,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3080 states. [2021-08-21 13:23:22,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3080 to 1994. [2021-08-21 13:23:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 2.902157551430005) internal successors, (5784), 1993 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:22,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 5784 transitions. [2021-08-21 13:23:22,826 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 5784 transitions. Word has length 33 [2021-08-21 13:23:22,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:22,826 INFO L470 AbstractCegarLoop]: Abstraction has 1994 states and 5784 transitions. [2021-08-21 13:23:22,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 5784 transitions. [2021-08-21 13:23:22,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:23:22,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:22,828 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, 1, 1, 1, 1] [2021-08-21 13:23:22,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 13:23:23,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 13:23:23,029 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:23,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1906024877, now seen corresponding path program 46 times [2021-08-21 13:23:23,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:23,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318873759] [2021-08-21 13:23:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:23,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:23,301 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 13:23:23,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:23,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318873759] [2021-08-21 13:23:23,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318873759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:23,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592802517] [2021-08-21 13:23:23,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:23:23,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:23,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:23,302 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:23,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 13:23:26,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:23:26,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:26,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:23:26,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:27,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592802517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:27,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:27,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-21 13:23:27,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924393207] [2021-08-21 13:23:27,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:23:27,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:27,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:23:27,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:23:27,030 INFO L87 Difference]: Start difference. First operand 1994 states and 5784 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:27,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:27,552 INFO L93 Difference]: Finished difference Result 3024 states and 8672 transitions. [2021-08-21 13:23:27,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:23:27,553 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:23:27,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:27,558 INFO L225 Difference]: With dead ends: 3024 [2021-08-21 13:23:27,558 INFO L226 Difference]: Without dead ends: 3009 [2021-08-21 13:23:27,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 498.4ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:23:27,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-08-21 13:23:27,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 1889. [2021-08-21 13:23:27,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 2.9152542372881354) internal successors, (5504), 1888 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 5504 transitions. [2021-08-21 13:23:27,584 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 5504 transitions. Word has length 33 [2021-08-21 13:23:27,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:27,584 INFO L470 AbstractCegarLoop]: Abstraction has 1889 states and 5504 transitions. [2021-08-21 13:23:27,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:27,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 5504 transitions. [2021-08-21 13:23:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:23:27,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:27,586 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, 1, 1, 1, 1] [2021-08-21 13:23:27,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:27,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:27,787 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:27,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:27,787 INFO L82 PathProgramCache]: Analyzing trace with hash -493544957, now seen corresponding path program 47 times [2021-08-21 13:23:27,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:27,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926843394] [2021-08-21 13:23:27,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:27,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:28,061 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 13:23:28,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:28,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926843394] [2021-08-21 13:23:28,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926843394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:28,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946121463] [2021-08-21 13:23:28,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:23:28,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:28,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:28,062 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:28,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 13:23:31,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:23:31,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:31,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:23:31,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:31,865 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 13:23:31,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946121463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:31,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:31,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 13:23:31,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519294121] [2021-08-21 13:23:31,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:23:31,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:31,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:23:31,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:23:31,866 INFO L87 Difference]: Start difference. First operand 1889 states and 5504 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 13:23:32,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:32,524 INFO L93 Difference]: Finished difference Result 2401 states and 6909 transitions. [2021-08-21 13:23:32,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:23:32,525 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 33 [2021-08-21 13:23:32,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:32,528 INFO L225 Difference]: With dead ends: 2401 [2021-08-21 13:23:32,528 INFO L226 Difference]: Without dead ends: 2382 [2021-08-21 13:23:32,529 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 636.1ms TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:23:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-08-21 13:23:32,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1915. [2021-08-21 13:23:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.9221525600835947) internal successors, (5593), 1914 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:32,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5593 transitions. [2021-08-21 13:23:32,552 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5593 transitions. Word has length 33 [2021-08-21 13:23:32,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:32,553 INFO L470 AbstractCegarLoop]: Abstraction has 1915 states and 5593 transitions. [2021-08-21 13:23:32,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 13:23:32,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5593 transitions. [2021-08-21 13:23:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:23:32,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:32,556 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, 1, 1, 1, 1] [2021-08-21 13:23:32,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:32,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 13:23:32,757 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:32,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:32,758 INFO L82 PathProgramCache]: Analyzing trace with hash 382637507, now seen corresponding path program 48 times [2021-08-21 13:23:32,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:32,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759545964] [2021-08-21 13:23:32,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:32,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:33,013 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 13:23:33,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:33,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759545964] [2021-08-21 13:23:33,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759545964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:33,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398676044] [2021-08-21 13:23:33,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:23:33,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:33,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:33,014 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:33,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 13:23:36,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:23:36,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:36,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:23:36,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:36,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-21 13:23:37,116 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 13:23:37,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398676044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:37,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:37,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:23:37,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183876656] [2021-08-21 13:23:37,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:23:37,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:37,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:23:37,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:23:37,118 INFO L87 Difference]: Start difference. First operand 1915 states and 5593 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:38,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:38,066 INFO L93 Difference]: Finished difference Result 2401 states and 6903 transitions. [2021-08-21 13:23:38,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:23:38,066 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:23:38,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:38,070 INFO L225 Difference]: With dead ends: 2401 [2021-08-21 13:23:38,070 INFO L226 Difference]: Without dead ends: 2386 [2021-08-21 13:23:38,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 836.5ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:23:38,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-08-21 13:23:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1911. [2021-08-21 13:23:38,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 2.9209424083769635) internal successors, (5579), 1910 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:38,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5579 transitions. [2021-08-21 13:23:38,092 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5579 transitions. Word has length 33 [2021-08-21 13:23:38,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:38,092 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 5579 transitions. [2021-08-21 13:23:38,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:38,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5579 transitions. [2021-08-21 13:23:38,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:23:38,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:38,095 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, 1, 1, 1, 1] [2021-08-21 13:23:38,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:38,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:38,295 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:38,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:38,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1720498621, now seen corresponding path program 49 times [2021-08-21 13:23:38,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:38,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955466372] [2021-08-21 13:23:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:38,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:38,552 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 13:23:38,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:38,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955466372] [2021-08-21 13:23:38,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955466372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:38,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361786675] [2021-08-21 13:23:38,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:23:38,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:38,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:38,553 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:38,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 13:23:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:41,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:23:41,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:42,427 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 13:23:42,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361786675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:42,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:42,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 13:23:42,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390363512] [2021-08-21 13:23:42,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:23:42,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:42,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:23:42,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:23:42,428 INFO L87 Difference]: Start difference. First operand 1911 states and 5579 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 13:23:42,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:42,866 INFO L93 Difference]: Finished difference Result 2538 states and 7369 transitions. [2021-08-21 13:23:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:23:42,867 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 33 [2021-08-21 13:23:42,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:42,870 INFO L225 Difference]: With dead ends: 2538 [2021-08-21 13:23:42,870 INFO L226 Difference]: Without dead ends: 2519 [2021-08-21 13:23:42,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 426.4ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:23:42,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-08-21 13:23:42,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 1933. [2021-08-21 13:23:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 2.9151138716356106) internal successors, (5632), 1932 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:42,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 5632 transitions. [2021-08-21 13:23:42,894 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 5632 transitions. Word has length 33 [2021-08-21 13:23:42,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:42,895 INFO L470 AbstractCegarLoop]: Abstraction has 1933 states and 5632 transitions. [2021-08-21 13:23:42,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 13:23:42,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 5632 transitions. [2021-08-21 13:23:42,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:23:42,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:42,897 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, 1, 1, 1, 1] [2021-08-21 13:23:42,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:43,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 13:23:43,101 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:43,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:43,101 INFO L82 PathProgramCache]: Analyzing trace with hash 741551271, now seen corresponding path program 50 times [2021-08-21 13:23:43,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:43,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68023839] [2021-08-21 13:23:43,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:43,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:43,378 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 13:23:43,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:43,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68023839] [2021-08-21 13:23:43,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68023839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:43,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807919627] [2021-08-21 13:23:43,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:23:43,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:43,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:43,380 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:43,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 13:23:46,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:23:46,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:46,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:23:46,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:47,116 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 5 treesize of output 3 [2021-08-21 13:23:47,482 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 13:23:47,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807919627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:47,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:47,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:23:47,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800581128] [2021-08-21 13:23:47,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:23:47,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:47,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:23:47,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:23:47,483 INFO L87 Difference]: Start difference. First operand 1933 states and 5632 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:47,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:47,985 INFO L93 Difference]: Finished difference Result 2564 states and 7420 transitions. [2021-08-21 13:23:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:23:47,985 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:23:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:47,989 INFO L225 Difference]: With dead ends: 2564 [2021-08-21 13:23:47,989 INFO L226 Difference]: Without dead ends: 2549 [2021-08-21 13:23:47,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 503.9ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:23:47,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-08-21 13:23:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 1911. [2021-08-21 13:23:48,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 2.9209424083769635) internal successors, (5579), 1910 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:48,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5579 transitions. [2021-08-21 13:23:48,013 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5579 transitions. Word has length 33 [2021-08-21 13:23:48,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:48,013 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 5579 transitions. [2021-08-21 13:23:48,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:48,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5579 transitions. [2021-08-21 13:23:48,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:23:48,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:48,015 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, 1, 1, 1, 1] [2021-08-21 13:23:48,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:48,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-21 13:23:48,216 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:48,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:48,216 INFO L82 PathProgramCache]: Analyzing trace with hash -114396377, now seen corresponding path program 51 times [2021-08-21 13:23:48,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:48,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575519411] [2021-08-21 13:23:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:48,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:48,510 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 13:23:48,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:48,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575519411] [2021-08-21 13:23:48,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575519411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:48,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164618133] [2021-08-21 13:23:48,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:23:48,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:48,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:48,511 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:48,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 13:23:51,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:23:51,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:51,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:23:51,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:52,255 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 5 treesize of output 3 [2021-08-21 13:23:52,709 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 13:23:52,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164618133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:52,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:52,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:23:52,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974320025] [2021-08-21 13:23:52,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:23:52,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:52,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:23:52,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:23:52,710 INFO L87 Difference]: Start difference. First operand 1911 states and 5579 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:53,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:53,501 INFO L93 Difference]: Finished difference Result 2504 states and 7146 transitions. [2021-08-21 13:23:53,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:23:53,502 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:23:53,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:53,506 INFO L225 Difference]: With dead ends: 2504 [2021-08-21 13:23:53,506 INFO L226 Difference]: Without dead ends: 2489 [2021-08-21 13:23:53,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 789.7ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:23:53,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2021-08-21 13:23:53,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 1932. [2021-08-21 13:23:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.9290523045054377) internal successors, (5656), 1931 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:53,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 5656 transitions. [2021-08-21 13:23:53,530 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 5656 transitions. Word has length 33 [2021-08-21 13:23:53,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:53,530 INFO L470 AbstractCegarLoop]: Abstraction has 1932 states and 5656 transitions. [2021-08-21 13:23:53,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 5656 transitions. [2021-08-21 13:23:53,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:23:53,532 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:53,532 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, 1, 1, 1, 1] [2021-08-21 13:23:53,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:53,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:53,733 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:53,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:53,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1780794963, now seen corresponding path program 52 times [2021-08-21 13:23:53,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:53,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334985604] [2021-08-21 13:23:53,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:53,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:53,986 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 13:23:53,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:53,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334985604] [2021-08-21 13:23:53,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334985604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:53,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962925049] [2021-08-21 13:23:53,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:23:53,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:53,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:53,987 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:53,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 13:23:57,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:23:57,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:57,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:23:57,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:58,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962925049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:58,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:58,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 13:23:58,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742619715] [2021-08-21 13:23:58,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:23:58,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:58,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:23:58,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:23:58,107 INFO L87 Difference]: Start difference. First operand 1932 states and 5656 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 13:23:58,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:58,743 INFO L93 Difference]: Finished difference Result 2475 states and 7081 transitions. [2021-08-21 13:23:58,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:23:58,744 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 33 [2021-08-21 13:23:58,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:58,747 INFO L225 Difference]: With dead ends: 2475 [2021-08-21 13:23:58,747 INFO L226 Difference]: Without dead ends: 2460 [2021-08-21 13:23:58,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 625.2ms TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:23:58,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-08-21 13:23:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 1900. [2021-08-21 13:23:58,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.9152185360716167) internal successors, (5536), 1899 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:58,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 5536 transitions. [2021-08-21 13:23:58,771 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 5536 transitions. Word has length 33 [2021-08-21 13:23:58,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:58,771 INFO L470 AbstractCegarLoop]: Abstraction has 1900 states and 5536 transitions. [2021-08-21 13:23:58,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 13:23:58,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 5536 transitions. [2021-08-21 13:23:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:23:58,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:58,773 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, 1, 1, 1, 1] [2021-08-21 13:23:58,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 13:23:58,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 13:23:58,974 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:58,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:58,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1628011223, now seen corresponding path program 53 times [2021-08-21 13:23:58,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:58,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426406324] [2021-08-21 13:23:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:58,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:59,233 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 13:23:59,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:59,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426406324] [2021-08-21 13:23:59,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426406324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:59,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358739646] [2021-08-21 13:23:59,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:23:59,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:59,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:59,236 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:59,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 13:24:02,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:24:02,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:02,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:24:02,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:03,425 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 13:24:03,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358739646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:03,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:03,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 13:24:03,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864324228] [2021-08-21 13:24:03,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:24:03,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:03,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:24:03,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:24:03,426 INFO L87 Difference]: Start difference. First operand 1900 states and 5536 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 13:24:04,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:04,037 INFO L93 Difference]: Finished difference Result 2840 states and 8188 transitions. [2021-08-21 13:24:04,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:24:04,038 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 33 [2021-08-21 13:24:04,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:04,042 INFO L225 Difference]: With dead ends: 2840 [2021-08-21 13:24:04,042 INFO L226 Difference]: Without dead ends: 2821 [2021-08-21 13:24:04,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 543.1ms TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:24:04,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2021-08-21 13:24:04,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 1908. [2021-08-21 13:24:04,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1907 states have (on average 2.916622968012585) internal successors, (5562), 1907 states have internal predecessors, (5562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 5562 transitions. [2021-08-21 13:24:04,068 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 5562 transitions. Word has length 33 [2021-08-21 13:24:04,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:04,068 INFO L470 AbstractCegarLoop]: Abstraction has 1908 states and 5562 transitions. [2021-08-21 13:24:04,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 13:24:04,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 5562 transitions. [2021-08-21 13:24:04,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:24:04,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:04,071 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, 1, 1, 1, 1] [2021-08-21 13:24:04,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:04,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 13:24:04,271 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:04,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:04,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1790773609, now seen corresponding path program 54 times [2021-08-21 13:24:04,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:04,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462783376] [2021-08-21 13:24:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:04,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:04,541 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 13:24:04,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:04,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462783376] [2021-08-21 13:24:04,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462783376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:04,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283812577] [2021-08-21 13:24:04,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:24:04,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:04,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:04,542 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:04,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 13:24:08,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:24:08,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:08,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:24:08,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:08,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-21 13:24:09,000 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 13:24:09,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283812577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:09,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:09,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:24:09,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741313152] [2021-08-21 13:24:09,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:24:09,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:09,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:24:09,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:24:09,001 INFO L87 Difference]: Start difference. First operand 1908 states and 5562 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:10,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:10,124 INFO L93 Difference]: Finished difference Result 2601 states and 7460 transitions. [2021-08-21 13:24:10,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:24:10,124 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:24:10,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:10,127 INFO L225 Difference]: With dead ends: 2601 [2021-08-21 13:24:10,128 INFO L226 Difference]: Without dead ends: 2571 [2021-08-21 13:24:10,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1053.7ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:24:10,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-08-21 13:24:10,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1900. [2021-08-21 13:24:10,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.9152185360716167) internal successors, (5536), 1899 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 5536 transitions. [2021-08-21 13:24:10,151 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 5536 transitions. Word has length 33 [2021-08-21 13:24:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:10,151 INFO L470 AbstractCegarLoop]: Abstraction has 1900 states and 5536 transitions. [2021-08-21 13:24:10,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 5536 transitions. [2021-08-21 13:24:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:24:10,153 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:10,153 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, 1, 1, 1, 1] [2021-08-21 13:24:10,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:10,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:10,354 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:10,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:10,354 INFO L82 PathProgramCache]: Analyzing trace with hash -516801493, now seen corresponding path program 55 times [2021-08-21 13:24:10,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:10,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133452770] [2021-08-21 13:24:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:10,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:10,636 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 13:24:10,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:10,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133452770] [2021-08-21 13:24:10,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133452770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:10,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898893139] [2021-08-21 13:24:10,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:24:10,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:10,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:10,641 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:10,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 13:24:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:14,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:24:14,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:24:15,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898893139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:15,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:15,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 13:24:15,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654628509] [2021-08-21 13:24:15,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:24:15,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:15,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:24:15,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:24:15,129 INFO L87 Difference]: Start difference. First operand 1900 states and 5536 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 13:24:16,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:16,158 INFO L93 Difference]: Finished difference Result 2680 states and 7637 transitions. [2021-08-21 13:24:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:24:16,158 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 33 [2021-08-21 13:24:16,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:16,162 INFO L225 Difference]: With dead ends: 2680 [2021-08-21 13:24:16,162 INFO L226 Difference]: Without dead ends: 2665 [2021-08-21 13:24:16,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 846.2ms TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:24:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-08-21 13:24:16,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1942. [2021-08-21 13:24:16,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 2.9206594538897477) internal successors, (5669), 1941 states have internal predecessors, (5669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:16,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 5669 transitions. [2021-08-21 13:24:16,189 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 5669 transitions. Word has length 33 [2021-08-21 13:24:16,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:16,189 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 5669 transitions. [2021-08-21 13:24:16,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 13:24:16,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 5669 transitions. [2021-08-21 13:24:16,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:24:16,192 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:16,192 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, 1, 1, 1, 1] [2021-08-21 13:24:16,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:16,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:16,418 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:16,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:16,418 INFO L82 PathProgramCache]: Analyzing trace with hash 2111767217, now seen corresponding path program 56 times [2021-08-21 13:24:16,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:16,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659011416] [2021-08-21 13:24:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:16,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:16,683 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 13:24:16,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:16,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659011416] [2021-08-21 13:24:16,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659011416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:16,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861473051] [2021-08-21 13:24:16,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:24:16,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:16,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:16,684 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:16,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 13:24:20,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:24:20,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:20,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:24:20,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:20,889 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 5 treesize of output 3 [2021-08-21 13:24:21,299 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 13:24:21,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861473051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:21,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:21,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:24:21,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043531902] [2021-08-21 13:24:21,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:24:21,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:21,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:24:21,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:24:21,300 INFO L87 Difference]: Start difference. First operand 1942 states and 5669 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:22,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:22,009 INFO L93 Difference]: Finished difference Result 2932 states and 8415 transitions. [2021-08-21 13:24:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:24:22,009 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:24:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:22,014 INFO L225 Difference]: With dead ends: 2932 [2021-08-21 13:24:22,014 INFO L226 Difference]: Without dead ends: 2917 [2021-08-21 13:24:22,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 669.0ms TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:24:22,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-08-21 13:24:22,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 1889. [2021-08-21 13:24:22,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 2.9152542372881354) internal successors, (5504), 1888 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 5504 transitions. [2021-08-21 13:24:22,045 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 5504 transitions. Word has length 33 [2021-08-21 13:24:22,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:22,045 INFO L470 AbstractCegarLoop]: Abstraction has 1889 states and 5504 transitions. [2021-08-21 13:24:22,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:22,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 5504 transitions. [2021-08-21 13:24:22,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:24:22,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:22,048 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, 1, 1, 1, 1] [2021-08-21 13:24:22,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:22,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:22,249 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:22,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:22,250 INFO L82 PathProgramCache]: Analyzing trace with hash 689886501, now seen corresponding path program 57 times [2021-08-21 13:24:22,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:22,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738914350] [2021-08-21 13:24:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:22,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:22,501 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 13:24:22,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:22,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738914350] [2021-08-21 13:24:22,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738914350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:22,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973621350] [2021-08-21 13:24:22,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:24:22,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:22,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:22,502 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:22,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 13:24:26,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:24:26,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:26,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:24:26,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:26,754 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 5 treesize of output 3 [2021-08-21 13:24:27,176 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 13:24:27,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973621350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:27,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:27,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:24:27,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710242436] [2021-08-21 13:24:27,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:24:27,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:27,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:24:27,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:24:27,177 INFO L87 Difference]: Start difference. First operand 1889 states and 5504 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:27,946 INFO L93 Difference]: Finished difference Result 2942 states and 8439 transitions. [2021-08-21 13:24:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:24:27,946 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:24:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:27,951 INFO L225 Difference]: With dead ends: 2942 [2021-08-21 13:24:27,951 INFO L226 Difference]: Without dead ends: 2923 [2021-08-21 13:24:27,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 645.3ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:24:27,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2021-08-21 13:24:27,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 1893. [2021-08-21 13:24:27,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.916490486257928) internal successors, (5518), 1892 states have internal predecessors, (5518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 5518 transitions. [2021-08-21 13:24:27,981 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 5518 transitions. Word has length 33 [2021-08-21 13:24:27,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:27,981 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 5518 transitions. [2021-08-21 13:24:27,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 5518 transitions. [2021-08-21 13:24:27,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:24:27,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:27,983 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, 1, 1, 1, 1] [2021-08-21 13:24:28,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-21 13:24:28,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 13:24:28,184 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:28,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:28,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1566068965, now seen corresponding path program 58 times [2021-08-21 13:24:28,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:28,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629124465] [2021-08-21 13:24:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:28,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:28,449 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 13:24:28,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:28,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629124465] [2021-08-21 13:24:28,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629124465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:28,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610497540] [2021-08-21 13:24:28,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:24:28,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:28,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:28,452 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:28,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 13:24:32,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:24:32,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:32,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:24:32,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:33,077 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 13:24:33,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610497540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:33,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:33,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 13:24:33,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741232342] [2021-08-21 13:24:33,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:24:33,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:33,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:24:33,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:24:33,078 INFO L87 Difference]: Start difference. First operand 1893 states and 5518 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 13:24:34,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:34,018 INFO L93 Difference]: Finished difference Result 2516 states and 7218 transitions. [2021-08-21 13:24:34,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:24:34,018 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 33 [2021-08-21 13:24:34,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:34,022 INFO L225 Difference]: With dead ends: 2516 [2021-08-21 13:24:34,022 INFO L226 Difference]: Without dead ends: 2501 [2021-08-21 13:24:34,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 784.3ms TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:24:34,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-08-21 13:24:34,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 1881. [2021-08-21 13:24:34,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 2.9148936170212765) internal successors, (5480), 1880 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 5480 transitions. [2021-08-21 13:24:34,046 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 5480 transitions. Word has length 33 [2021-08-21 13:24:34,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:34,047 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 5480 transitions. [2021-08-21 13:24:34,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 13:24:34,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 5480 transitions. [2021-08-21 13:24:34,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:24:34,049 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:34,049 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, 1, 1, 1, 1] [2021-08-21 13:24:34,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:34,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-21 13:24:34,250 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:34,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:34,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1694496615, now seen corresponding path program 59 times [2021-08-21 13:24:34,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:34,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886657470] [2021-08-21 13:24:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:34,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:34,508 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 13:24:34,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:34,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886657470] [2021-08-21 13:24:34,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886657470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:34,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762420827] [2021-08-21 13:24:34,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:24:34,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:34,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:34,518 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:34,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 13:24:38,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:24:38,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:38,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:24:38,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:24:39,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762420827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:39,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:39,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 13:24:39,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293040537] [2021-08-21 13:24:39,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:24:39,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:39,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:24:39,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:24:39,182 INFO L87 Difference]: Start difference. First operand 1881 states and 5480 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 13:24:40,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:40,032 INFO L93 Difference]: Finished difference Result 2510 states and 7169 transitions. [2021-08-21 13:24:40,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:24:40,033 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 33 [2021-08-21 13:24:40,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:40,036 INFO L225 Difference]: With dead ends: 2510 [2021-08-21 13:24:40,036 INFO L226 Difference]: Without dead ends: 2495 [2021-08-21 13:24:40,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 803.1ms TimeCoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:24:40,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-08-21 13:24:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 1902. [2021-08-21 13:24:40,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.923198316675434) internal successors, (5557), 1901 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:40,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5557 transitions. [2021-08-21 13:24:40,062 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5557 transitions. Word has length 33 [2021-08-21 13:24:40,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:40,062 INFO L470 AbstractCegarLoop]: Abstraction has 1902 states and 5557 transitions. [2021-08-21 13:24:40,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 13:24:40,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5557 transitions. [2021-08-21 13:24:40,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:24:40,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:40,066 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, 1, 1, 1, 1] [2021-08-21 13:24:40,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:40,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-21 13:24:40,289 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:40,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:40,289 INFO L82 PathProgramCache]: Analyzing trace with hash 28098029, now seen corresponding path program 60 times [2021-08-21 13:24:40,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:40,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21641427] [2021-08-21 13:24:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:40,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:40,549 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 13:24:40,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:40,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21641427] [2021-08-21 13:24:40,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21641427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:40,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550229159] [2021-08-21 13:24:40,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:24:40,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:40,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:40,551 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:40,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 13:24:44,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:24:44,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:44,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:24:44,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:45,373 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 13:24:45,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550229159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:45,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:45,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:24:45,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885753493] [2021-08-21 13:24:45,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:24:45,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:45,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:24:45,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:24:45,375 INFO L87 Difference]: Start difference. First operand 1902 states and 5557 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:46,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:46,170 INFO L93 Difference]: Finished difference Result 2848 states and 8175 transitions. [2021-08-21 13:24:46,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:24:46,170 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:24:46,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:46,176 INFO L225 Difference]: With dead ends: 2848 [2021-08-21 13:24:46,176 INFO L226 Difference]: Without dead ends: 2833 [2021-08-21 13:24:46,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 710.4ms TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:24:46,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-08-21 13:24:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 1784. [2021-08-21 13:24:46,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 2.9209197980931014) internal successors, (5208), 1783 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:46,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 5208 transitions. [2021-08-21 13:24:46,212 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 5208 transitions. Word has length 33 [2021-08-21 13:24:46,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:46,212 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 5208 transitions. [2021-08-21 13:24:46,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:46,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 5208 transitions. [2021-08-21 13:24:46,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:24:46,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:46,216 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, 1, 1, 1, 1] [2021-08-21 13:24:46,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:46,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:46,421 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:46,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:46,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1005542603, now seen corresponding path program 61 times [2021-08-21 13:24:46,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:46,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427458189] [2021-08-21 13:24:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:46,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:24:46,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:46,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427458189] [2021-08-21 13:24:46,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427458189] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:24:46,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:24:46,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 13:24:46,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439923147] [2021-08-21 13:24:46,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:24:46,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:46,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:24:46,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:24:46,445 INFO L87 Difference]: Start difference. First operand 1784 states and 5208 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 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 13:24:46,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:46,453 INFO L93 Difference]: Finished difference Result 1474 states and 4216 transitions. [2021-08-21 13:24:46,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:24:46,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 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 33 [2021-08-21 13:24:46,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:46,455 INFO L225 Difference]: With dead ends: 1474 [2021-08-21 13:24:46,456 INFO L226 Difference]: Without dead ends: 1474 [2021-08-21 13:24:46,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:24:46,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-08-21 13:24:46,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2021-08-21 13:24:46,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 2.8621860149355056) internal successors, (4216), 1473 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4216 transitions. [2021-08-21 13:24:46,473 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4216 transitions. Word has length 33 [2021-08-21 13:24:46,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:46,473 INFO L470 AbstractCegarLoop]: Abstraction has 1474 states and 4216 transitions. [2021-08-21 13:24:46,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 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 13:24:46,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4216 transitions. [2021-08-21 13:24:46,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:24:46,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:46,475 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, 1, 1, 1, 1] [2021-08-21 13:24:46,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-08-21 13:24:46,476 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:46,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:46,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1645279201, now seen corresponding path program 62 times [2021-08-21 13:24:46,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:46,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599750717] [2021-08-21 13:24:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:46,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:46,816 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 13:24:46,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:46,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599750717] [2021-08-21 13:24:46,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599750717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:46,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724392481] [2021-08-21 13:24:46,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:24:46,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:46,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:46,817 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:46,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 13:24:51,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:24:51,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:51,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:24:51,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:51,463 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 5 treesize of output 3 [2021-08-21 13:24:51,670 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 13:24:51,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724392481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:51,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:51,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:24:51,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481257004] [2021-08-21 13:24:51,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:24:51,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:51,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:24:51,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:24:51,672 INFO L87 Difference]: Start difference. First operand 1474 states and 4216 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:52,223 INFO L93 Difference]: Finished difference Result 2389 states and 6716 transitions. [2021-08-21 13:24:52,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:24:52,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 13:24:52,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:52,227 INFO L225 Difference]: With dead ends: 2389 [2021-08-21 13:24:52,227 INFO L226 Difference]: Without dead ends: 2374 [2021-08-21 13:24:52,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 460.7ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:24:52,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2021-08-21 13:24:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 1513. [2021-08-21 13:24:52,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 2.8624338624338623) internal successors, (4328), 1512 states have internal predecessors, (4328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 4328 transitions. [2021-08-21 13:24:52,249 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 4328 transitions. Word has length 33 [2021-08-21 13:24:52,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:52,249 INFO L470 AbstractCegarLoop]: Abstraction has 1513 states and 4328 transitions. [2021-08-21 13:24:52,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:52,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 4328 transitions. [2021-08-21 13:24:52,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:24:52,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:52,251 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, 1, 1, 1, 1] [2021-08-21 13:24:52,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 13:24:52,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:52,452 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:52,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:52,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1880955999, now seen corresponding path program 63 times [2021-08-21 13:24:52,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:52,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491745399] [2021-08-21 13:24:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:52,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:52,720 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 13:24:52,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:52,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491745399] [2021-08-21 13:24:52,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491745399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:52,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336219847] [2021-08-21 13:24:52,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:24:52,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:52,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:52,723 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:52,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 13:24:56,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:24:56,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:56,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:24:56,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:57,326 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 5 treesize of output 3 [2021-08-21 13:24:57,616 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 13:24:57,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336219847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:57,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:57,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:24:57,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674394930] [2021-08-21 13:24:57,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:24:57,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:57,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:24:57,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:24:57,618 INFO L87 Difference]: Start difference. First operand 1513 states and 4328 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:58,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:58,079 INFO L93 Difference]: Finished difference Result 2114 states and 5956 transitions. [2021-08-21 13:24:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:24:58,079 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 13:24:58,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:58,083 INFO L225 Difference]: With dead ends: 2114 [2021-08-21 13:24:58,083 INFO L226 Difference]: Without dead ends: 2095 [2021-08-21 13:24:58,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 435.4ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:24:58,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-08-21 13:24:58,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1525. [2021-08-21 13:24:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 2.8648293963254594) internal successors, (4366), 1524 states have internal predecessors, (4366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:58,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 4366 transitions. [2021-08-21 13:24:58,105 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 4366 transitions. Word has length 33 [2021-08-21 13:24:58,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:58,105 INFO L470 AbstractCegarLoop]: Abstraction has 1525 states and 4366 transitions. [2021-08-21 13:24:58,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:58,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 4366 transitions. [2021-08-21 13:24:58,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:24:58,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:58,106 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, 1, 1, 1, 1] [2021-08-21 13:24:58,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:58,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-21 13:24:58,309 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:58,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:58,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1537828833, now seen corresponding path program 64 times [2021-08-21 13:24:58,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:58,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089796495] [2021-08-21 13:24:58,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:58,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:58,585 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 13:24:58,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:58,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089796495] [2021-08-21 13:24:58,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089796495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:58,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282552961] [2021-08-21 13:24:58,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:24:58,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:58,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:58,587 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:58,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 13:25:02,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:25:02,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:02,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:25:02,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:03,547 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 13:25:03,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282552961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:03,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:03,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-21 13:25:03,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878325229] [2021-08-21 13:25:03,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:25:03,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:03,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:25:03,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:25:03,548 INFO L87 Difference]: Start difference. First operand 1525 states and 4366 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:04,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:04,367 INFO L93 Difference]: Finished difference Result 2060 states and 5749 transitions. [2021-08-21 13:25:04,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:25:04,368 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:25:04,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:04,371 INFO L225 Difference]: With dead ends: 2060 [2021-08-21 13:25:04,371 INFO L226 Difference]: Without dead ends: 2045 [2021-08-21 13:25:04,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 699.2ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:25:04,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-08-21 13:25:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1521. [2021-08-21 13:25:04,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.863157894736842) internal successors, (4352), 1520 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4352 transitions. [2021-08-21 13:25:04,390 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4352 transitions. Word has length 33 [2021-08-21 13:25:04,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:04,390 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 4352 transitions. [2021-08-21 13:25:04,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4352 transitions. [2021-08-21 13:25:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:25:04,391 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:04,391 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, 1, 1, 1, 1] [2021-08-21 13:25:04,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:04,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-21 13:25:04,592 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:04,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:04,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2022671139, now seen corresponding path program 65 times [2021-08-21 13:25:04,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:04,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995240087] [2021-08-21 13:25:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:04,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:25:04,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:04,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995240087] [2021-08-21 13:25:04,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995240087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:04,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767469435] [2021-08-21 13:25:04,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:25:04,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:04,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:04,917 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:04,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 13:25:09,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:25:09,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:09,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:25:09,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:09,985 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 13:25:09,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767469435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:09,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:09,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-21 13:25:09,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322290171] [2021-08-21 13:25:09,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:25:09,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:09,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:25:09,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:25:09,987 INFO L87 Difference]: Start difference. First operand 1521 states and 4352 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:10,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:10,731 INFO L93 Difference]: Finished difference Result 2637 states and 7354 transitions. [2021-08-21 13:25:10,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:25:10,731 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:25:10,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:10,735 INFO L225 Difference]: With dead ends: 2637 [2021-08-21 13:25:10,735 INFO L226 Difference]: Without dead ends: 2622 [2021-08-21 13:25:10,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 624.2ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:25:10,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-08-21 13:25:10,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 1527. [2021-08-21 13:25:10,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.8636959370904327) internal successors, (4370), 1526 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:10,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4370 transitions. [2021-08-21 13:25:10,767 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4370 transitions. Word has length 33 [2021-08-21 13:25:10,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:10,767 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 4370 transitions. [2021-08-21 13:25:10,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:10,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4370 transitions. [2021-08-21 13:25:10,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:25:10,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:10,770 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, 1, 1, 1, 1] [2021-08-21 13:25:10,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:10,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:10,989 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:10,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:10,989 INFO L82 PathProgramCache]: Analyzing trace with hash 739523679, now seen corresponding path program 66 times [2021-08-21 13:25:10,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:10,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210293244] [2021-08-21 13:25:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:10,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:11,282 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 13:25:11,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:11,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210293244] [2021-08-21 13:25:11,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210293244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:11,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182108549] [2021-08-21 13:25:11,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:25:11,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:11,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:11,283 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:11,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 13:25:15,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:25:15,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:15,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:25:15,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:16,108 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 5 treesize of output 3 [2021-08-21 13:25:16,423 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 13:25:16,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182108549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:16,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:16,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:25:16,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421300381] [2021-08-21 13:25:16,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:25:16,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:16,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:25:16,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:25:16,425 INFO L87 Difference]: Start difference. First operand 1527 states and 4370 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:17,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:17,022 INFO L93 Difference]: Finished difference Result 2611 states and 7273 transitions. [2021-08-21 13:25:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:25:17,022 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 13:25:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:17,041 INFO L225 Difference]: With dead ends: 2611 [2021-08-21 13:25:17,041 INFO L226 Difference]: Without dead ends: 2596 [2021-08-21 13:25:17,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 516.0ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:25:17,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-08-21 13:25:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1507. [2021-08-21 13:25:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 2.861885790172643) internal successors, (4310), 1506 states have internal predecessors, (4310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:17,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 4310 transitions. [2021-08-21 13:25:17,060 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 4310 transitions. Word has length 33 [2021-08-21 13:25:17,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:17,060 INFO L470 AbstractCegarLoop]: Abstraction has 1507 states and 4310 transitions. [2021-08-21 13:25:17,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:17,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 4310 transitions. [2021-08-21 13:25:17,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:25:17,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:17,062 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, 1, 1, 1, 1] [2021-08-21 13:25:17,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:17,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 13:25:17,263 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:17,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:17,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1023104835, now seen corresponding path program 67 times [2021-08-21 13:25:17,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:17,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152084525] [2021-08-21 13:25:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:17,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:17,554 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 13:25:17,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:17,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152084525] [2021-08-21 13:25:17,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152084525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:17,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001286686] [2021-08-21 13:25:17,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:25:17,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:17,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:17,557 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:17,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 13:25:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:22,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:25:22,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:22,675 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 13:25:22,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001286686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:22,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:22,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-21 13:25:22,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398909349] [2021-08-21 13:25:22,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:25:22,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:22,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:25:22,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:25:22,676 INFO L87 Difference]: Start difference. First operand 1507 states and 4310 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:23,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:23,130 INFO L93 Difference]: Finished difference Result 2483 states and 6920 transitions. [2021-08-21 13:25:23,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:25:23,131 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:25:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:23,134 INFO L225 Difference]: With dead ends: 2483 [2021-08-21 13:25:23,135 INFO L226 Difference]: Without dead ends: 2468 [2021-08-21 13:25:23,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 489.5ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:25:23,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2021-08-21 13:25:23,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 1576. [2021-08-21 13:25:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.843809523809524) internal successors, (4479), 1575 states have internal predecessors, (4479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 4479 transitions. [2021-08-21 13:25:23,155 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 4479 transitions. Word has length 33 [2021-08-21 13:25:23,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:23,156 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 4479 transitions. [2021-08-21 13:25:23,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:23,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 4479 transitions. [2021-08-21 13:25:23,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:25:23,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:23,158 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, 1, 1, 1, 1] [2021-08-21 13:25:23,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:23,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 13:25:23,359 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:23,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:23,359 INFO L82 PathProgramCache]: Analyzing trace with hash 987471787, now seen corresponding path program 68 times [2021-08-21 13:25:23,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:23,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067352120] [2021-08-21 13:25:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:23,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:23,648 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 13:25:23,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:23,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067352120] [2021-08-21 13:25:23,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067352120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:23,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484601023] [2021-08-21 13:25:23,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:25:23,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:23,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:23,650 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:23,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 13:25:28,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:25:28,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:28,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:25:28,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:28,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-21 13:25:28,954 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 13:25:28,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484601023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:28,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:28,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:25:28,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364449119] [2021-08-21 13:25:28,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:25:28,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:28,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:25:28,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:25:28,955 INFO L87 Difference]: Start difference. First operand 1576 states and 4479 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:29,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:29,648 INFO L93 Difference]: Finished difference Result 1881 states and 5259 transitions. [2021-08-21 13:25:29,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:25:29,648 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:25:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:29,651 INFO L225 Difference]: With dead ends: 1881 [2021-08-21 13:25:29,651 INFO L226 Difference]: Without dead ends: 1866 [2021-08-21 13:25:29,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 672.5ms TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:25:29,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-08-21 13:25:29,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1594. [2021-08-21 13:25:29,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 2.8455743879472695) internal successors, (4533), 1593 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:29,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 4533 transitions. [2021-08-21 13:25:29,669 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 4533 transitions. Word has length 33 [2021-08-21 13:25:29,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:29,669 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 4533 transitions. [2021-08-21 13:25:29,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:29,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 4533 transitions. [2021-08-21 13:25:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:25:29,671 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:29,671 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, 1, 1, 1, 1] [2021-08-21 13:25:29,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:29,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:29,872 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:29,872 INFO L82 PathProgramCache]: Analyzing trace with hash 758712943, now seen corresponding path program 69 times [2021-08-21 13:25:29,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:29,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826185112] [2021-08-21 13:25:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:29,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:30,154 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 13:25:30,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:30,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826185112] [2021-08-21 13:25:30,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826185112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:30,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911939479] [2021-08-21 13:25:30,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:25:30,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:30,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:30,156 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:30,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 13:25:34,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:25:34,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:34,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:25:34,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:35,439 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 13:25:35,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911939479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:35,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:35,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:25:35,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087101510] [2021-08-21 13:25:35,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:25:35,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:35,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:25:35,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:25:35,440 INFO L87 Difference]: Start difference. First operand 1594 states and 4533 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:35,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:35,895 INFO L93 Difference]: Finished difference Result 2092 states and 5887 transitions. [2021-08-21 13:25:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:25:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 13:25:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:35,899 INFO L225 Difference]: With dead ends: 2092 [2021-08-21 13:25:35,899 INFO L226 Difference]: Without dead ends: 2077 [2021-08-21 13:25:35,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 450.9ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:25:35,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-08-21 13:25:35,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1588. [2021-08-21 13:25:35,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 2.8424700693131695) internal successors, (4511), 1587 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:35,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 4511 transitions. [2021-08-21 13:25:35,918 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 4511 transitions. Word has length 33 [2021-08-21 13:25:35,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:35,918 INFO L470 AbstractCegarLoop]: Abstraction has 1588 states and 4511 transitions. [2021-08-21 13:25:35,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:35,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 4511 transitions. [2021-08-21 13:25:35,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:25:35,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:35,920 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, 1, 1, 1, 1] [2021-08-21 13:25:35,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-21 13:25:36,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-08-21 13:25:36,121 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:36,121 INFO L82 PathProgramCache]: Analyzing trace with hash -188018857, now seen corresponding path program 70 times [2021-08-21 13:25:36,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:36,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317991945] [2021-08-21 13:25:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:36,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:36,529 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 13:25:36,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:36,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317991945] [2021-08-21 13:25:36,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317991945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:36,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723680356] [2021-08-21 13:25:36,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:25:36,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:36,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:36,530 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:36,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 13:25:41,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:25:41,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:41,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:25:41,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:25:41,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723680356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:41,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:41,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-21 13:25:41,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053534512] [2021-08-21 13:25:41,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:25:41,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:41,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:25:41,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:25:41,824 INFO L87 Difference]: Start difference. First operand 1588 states and 4511 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:42,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:42,327 INFO L93 Difference]: Finished difference Result 2502 states and 6967 transitions. [2021-08-21 13:25:42,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:25:42,328 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:25:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:42,331 INFO L225 Difference]: With dead ends: 2502 [2021-08-21 13:25:42,331 INFO L226 Difference]: Without dead ends: 2487 [2021-08-21 13:25:42,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 626.8ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:25:42,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-08-21 13:25:42,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1594. [2021-08-21 13:25:42,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 2.84180790960452) internal successors, (4527), 1593 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:42,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 4527 transitions. [2021-08-21 13:25:42,352 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 4527 transitions. Word has length 33 [2021-08-21 13:25:42,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:42,352 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 4527 transitions. [2021-08-21 13:25:42,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:42,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 4527 transitions. [2021-08-21 13:25:42,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:25:42,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:42,354 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, 1, 1, 1, 1] [2021-08-21 13:25:42,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-21 13:25:42,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:42,557 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:42,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:42,557 INFO L82 PathProgramCache]: Analyzing trace with hash -342456375, now seen corresponding path program 71 times [2021-08-21 13:25:42,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:42,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286046539] [2021-08-21 13:25:42,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:42,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:42,869 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 13:25:42,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:42,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286046539] [2021-08-21 13:25:42,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286046539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:42,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042064515] [2021-08-21 13:25:42,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:25:42,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:42,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:42,870 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:42,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 13:25:47,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:25:47,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:47,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:25:47,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:25:48,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042064515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:48,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:48,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-21 13:25:48,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420410730] [2021-08-21 13:25:48,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:25:48,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:48,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:25:48,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:25:48,245 INFO L87 Difference]: Start difference. First operand 1594 states and 4527 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:48,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:48,805 INFO L93 Difference]: Finished difference Result 2501 states and 6968 transitions. [2021-08-21 13:25:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:25:48,806 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:25:48,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:48,810 INFO L225 Difference]: With dead ends: 2501 [2021-08-21 13:25:48,810 INFO L226 Difference]: Without dead ends: 2486 [2021-08-21 13:25:48,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 467.6ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:25:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-08-21 13:25:48,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1519. [2021-08-21 13:25:48,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.86034255599473) internal successors, (4342), 1518 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:48,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4342 transitions. [2021-08-21 13:25:48,831 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4342 transitions. Word has length 33 [2021-08-21 13:25:48,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:48,831 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 4342 transitions. [2021-08-21 13:25:48,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:48,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4342 transitions. [2021-08-21 13:25:48,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:25:48,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:48,833 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, 1, 1, 1, 1] [2021-08-21 13:25:48,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:49,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:49,033 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:49,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:49,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1552941087, now seen corresponding path program 72 times [2021-08-21 13:25:49,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:49,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336397773] [2021-08-21 13:25:49,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:49,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:49,325 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 13:25:49,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:49,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336397773] [2021-08-21 13:25:49,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336397773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:49,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509948693] [2021-08-21 13:25:49,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:25:49,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:49,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:49,327 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:49,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 13:25:54,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:25:54,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:54,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:25:54,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:54,455 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 5 treesize of output 3 [2021-08-21 13:25:54,902 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 13:25:54,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509948693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:54,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:54,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:25:54,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527245877] [2021-08-21 13:25:54,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:25:54,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:54,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:25:54,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:25:54,903 INFO L87 Difference]: Start difference. First operand 1519 states and 4342 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:55,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:55,611 INFO L93 Difference]: Finished difference Result 1875 states and 5272 transitions. [2021-08-21 13:25:55,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:25:55,611 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:25:55,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:55,614 INFO L225 Difference]: With dead ends: 1875 [2021-08-21 13:25:55,614 INFO L226 Difference]: Without dead ends: 1856 [2021-08-21 13:25:55,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 690.1ms TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:25:55,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-08-21 13:25:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1527. [2021-08-21 13:25:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.8636959370904327) internal successors, (4370), 1526 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:55,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4370 transitions. [2021-08-21 13:25:55,632 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4370 transitions. Word has length 33 [2021-08-21 13:25:55,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:55,632 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 4370 transitions. [2021-08-21 13:25:55,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:55,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4370 transitions. [2021-08-21 13:25:55,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:25:55,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:55,633 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, 1, 1, 1, 1] [2021-08-21 13:25:55,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:55,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:55,834 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:55,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:55,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1865843745, now seen corresponding path program 73 times [2021-08-21 13:25:55,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:55,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440579697] [2021-08-21 13:25:55,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:55,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:56,120 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 13:25:56,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:56,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440579697] [2021-08-21 13:25:56,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440579697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:56,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137226738] [2021-08-21 13:25:56,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:25:56,120 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:56,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:56,121 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:56,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 13:26:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:00,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:26:00,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:01,669 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 13:26:01,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137226738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:01,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:01,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-21 13:26:01,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933517327] [2021-08-21 13:26:01,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:26:01,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:01,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:26:01,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:26:01,670 INFO L87 Difference]: Start difference. First operand 1527 states and 4370 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:02,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:02,473 INFO L93 Difference]: Finished difference Result 1875 states and 5266 transitions. [2021-08-21 13:26:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:26:02,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 13:26:02,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:02,476 INFO L225 Difference]: With dead ends: 1875 [2021-08-21 13:26:02,476 INFO L226 Difference]: Without dead ends: 1860 [2021-08-21 13:26:02,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 652.8ms TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:26:02,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-08-21 13:26:02,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1523. [2021-08-21 13:26:02,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.862023653088042) internal successors, (4356), 1522 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4356 transitions. [2021-08-21 13:26:02,493 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4356 transitions. Word has length 33 [2021-08-21 13:26:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:02,493 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 4356 transitions. [2021-08-21 13:26:02,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:02,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4356 transitions. [2021-08-21 13:26:02,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:26:02,495 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:02,495 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, 1, 1, 1, 1] [2021-08-21 13:26:02,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:02,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-08-21 13:26:02,695 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:02,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:02,696 INFO L82 PathProgramCache]: Analyzing trace with hash 325987423, now seen corresponding path program 74 times [2021-08-21 13:26:02,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:02,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580908736] [2021-08-21 13:26:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:02,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:02,977 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 13:26:02,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:02,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580908736] [2021-08-21 13:26:02,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580908736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:02,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063503231] [2021-08-21 13:26:02,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:26:02,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:02,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:02,978 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:02,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 13:26:07,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:26:07,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:07,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:26:07,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:08,199 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 5 treesize of output 3 [2021-08-21 13:26:08,575 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 13:26:08,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063503231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:08,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:08,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:26:08,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473409069] [2021-08-21 13:26:08,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:26:08,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:08,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:26:08,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:26:08,577 INFO L87 Difference]: Start difference. First operand 1523 states and 4356 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:08,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:08,984 INFO L93 Difference]: Finished difference Result 2021 states and 5714 transitions. [2021-08-21 13:26:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 13:26:08,985 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:26:08,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:08,988 INFO L225 Difference]: With dead ends: 2021 [2021-08-21 13:26:08,988 INFO L226 Difference]: Without dead ends: 2002 [2021-08-21 13:26:08,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 436.6ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:26:08,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-08-21 13:26:09,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1527. [2021-08-21 13:26:09,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.8610747051114025) internal successors, (4366), 1526 states have internal predecessors, (4366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:09,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4366 transitions. [2021-08-21 13:26:09,005 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4366 transitions. Word has length 33 [2021-08-21 13:26:09,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:09,005 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 4366 transitions. [2021-08-21 13:26:09,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:09,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4366 transitions. [2021-08-21 13:26:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:26:09,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:09,007 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, 1, 1, 1, 1] [2021-08-21 13:26:09,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:09,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:09,207 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:09,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:09,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1506929981, now seen corresponding path program 75 times [2021-08-21 13:26:09,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:09,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544826539] [2021-08-21 13:26:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:09,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:09,454 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 13:26:09,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:09,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544826539] [2021-08-21 13:26:09,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544826539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:09,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399314902] [2021-08-21 13:26:09,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:26:09,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:09,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:09,455 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:09,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 13:26:14,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:26:14,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:14,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:26:14,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:15,224 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 13:26:15,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399314902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:15,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:15,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:26:15,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264616187] [2021-08-21 13:26:15,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:26:15,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:15,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:26:15,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:26:15,225 INFO L87 Difference]: Start difference. First operand 1527 states and 4366 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:15,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:15,736 INFO L93 Difference]: Finished difference Result 2017 states and 5700 transitions. [2021-08-21 13:26:15,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 13:26:15,737 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:26:15,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:15,740 INFO L225 Difference]: With dead ends: 2017 [2021-08-21 13:26:15,740 INFO L226 Difference]: Without dead ends: 2002 [2021-08-21 13:26:15,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 492.9ms TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:26:15,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-08-21 13:26:15,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1523. [2021-08-21 13:26:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.862023653088042) internal successors, (4356), 1522 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:15,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4356 transitions. [2021-08-21 13:26:15,757 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4356 transitions. Word has length 33 [2021-08-21 13:26:15,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:15,757 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 4356 transitions. [2021-08-21 13:26:15,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:15,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4356 transitions. [2021-08-21 13:26:15,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:26:15,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:15,759 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, 1, 1, 1, 1] [2021-08-21 13:26:15,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-21 13:26:15,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:15,960 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:15,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:15,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1932089667, now seen corresponding path program 76 times [2021-08-21 13:26:15,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:15,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989901470] [2021-08-21 13:26:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:15,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:16,232 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 13:26:16,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:16,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989901470] [2021-08-21 13:26:16,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989901470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:16,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112923636] [2021-08-21 13:26:16,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:26:16,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:16,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:16,234 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:16,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 13:26:21,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:26:21,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:21,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:26:21,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:26:22,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112923636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:22,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:22,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-21 13:26:22,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855787457] [2021-08-21 13:26:22,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:26:22,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:22,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:26:22,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:26:22,047 INFO L87 Difference]: Start difference. First operand 1523 states and 4356 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:22,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:22,801 INFO L93 Difference]: Finished difference Result 1873 states and 5244 transitions. [2021-08-21 13:26:22,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:26:22,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 13:26:22,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:22,804 INFO L225 Difference]: With dead ends: 1873 [2021-08-21 13:26:22,804 INFO L226 Difference]: Without dead ends: 1858 [2021-08-21 13:26:22,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 647.2ms TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:26:22,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-08-21 13:26:22,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1529. [2021-08-21 13:26:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.865183246073298) internal successors, (4378), 1528 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4378 transitions. [2021-08-21 13:26:22,825 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4378 transitions. Word has length 33 [2021-08-21 13:26:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:22,825 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 4378 transitions. [2021-08-21 13:26:22,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4378 transitions. [2021-08-21 13:26:22,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:26:22,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:22,827 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, 1, 1, 1, 1] [2021-08-21 13:26:22,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:23,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 13:26:23,027 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:23,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:23,028 INFO L82 PathProgramCache]: Analyzing trace with hash 265691081, now seen corresponding path program 77 times [2021-08-21 13:26:23,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:23,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961842406] [2021-08-21 13:26:23,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:23,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:23,295 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 13:26:23,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:23,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961842406] [2021-08-21 13:26:23,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961842406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:23,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091706545] [2021-08-21 13:26:23,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:26:23,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:23,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:23,297 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:23,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 13:26:28,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:26:28,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:28,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:26:28,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:26:29,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091706545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:29,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:29,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-21 13:26:29,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888768236] [2021-08-21 13:26:29,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:26:29,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:29,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:26:29,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:26:29,084 INFO L87 Difference]: Start difference. First operand 1529 states and 4378 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:29,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:29,792 INFO L93 Difference]: Finished difference Result 1844 states and 5179 transitions. [2021-08-21 13:26:29,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:26:29,793 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 13:26:29,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:29,795 INFO L225 Difference]: With dead ends: 1844 [2021-08-21 13:26:29,795 INFO L226 Difference]: Without dead ends: 1829 [2021-08-21 13:26:29,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 622.4ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:26:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-08-21 13:26:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1521. [2021-08-21 13:26:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.860526315789474) internal successors, (4348), 1520 states have internal predecessors, (4348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:29,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4348 transitions. [2021-08-21 13:26:29,811 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4348 transitions. Word has length 33 [2021-08-21 13:26:29,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:29,811 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 4348 transitions. [2021-08-21 13:26:29,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:29,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4348 transitions. [2021-08-21 13:26:29,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:26:29,813 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:29,813 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, 1, 1, 1, 1] [2021-08-21 13:26:29,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-21 13:26:30,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-21 13:26:30,014 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:30,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:30,014 INFO L82 PathProgramCache]: Analyzing trace with hash -620470029, now seen corresponding path program 78 times [2021-08-21 13:26:30,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:30,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021457028] [2021-08-21 13:26:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:30,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:30,269 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 13:26:30,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:30,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021457028] [2021-08-21 13:26:30,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021457028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:30,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718248323] [2021-08-21 13:26:30,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:26:30,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:30,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:30,278 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:30,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 13:26:35,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:26:35,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:35,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:26:35,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:35,810 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 5 treesize of output 3 [2021-08-21 13:26:36,220 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 13:26:36,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718248323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:36,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:36,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:26:36,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417593791] [2021-08-21 13:26:36,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:26:36,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:36,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:26:36,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:26:36,221 INFO L87 Difference]: Start difference. First operand 1521 states and 4348 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:36,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:36,939 INFO L93 Difference]: Finished difference Result 2332 states and 6559 transitions. [2021-08-21 13:26:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:26:36,940 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:26:36,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:36,943 INFO L225 Difference]: With dead ends: 2332 [2021-08-21 13:26:36,943 INFO L226 Difference]: Without dead ends: 2313 [2021-08-21 13:26:36,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 604.2ms TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:26:36,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-08-21 13:26:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1529. [2021-08-21 13:26:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.862565445026178) internal successors, (4374), 1528 states have internal predecessors, (4374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:36,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4374 transitions. [2021-08-21 13:26:36,967 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4374 transitions. Word has length 33 [2021-08-21 13:26:36,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:36,967 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 4374 transitions. [2021-08-21 13:26:36,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:36,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4374 transitions. [2021-08-21 13:26:36,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:26:36,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:36,969 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, 1, 1, 1, 1] [2021-08-21 13:26:36,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-21 13:26:37,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:37,169 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:37,170 INFO L82 PathProgramCache]: Analyzing trace with hash 255712435, now seen corresponding path program 79 times [2021-08-21 13:26:37,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:37,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074996219] [2021-08-21 13:26:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:37,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:37,460 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 13:26:37,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:37,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074996219] [2021-08-21 13:26:37,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074996219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:37,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979493956] [2021-08-21 13:26:37,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:26:37,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:37,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:37,465 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:37,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 13:26:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:42,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:26:42,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:43,403 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 13:26:43,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979493956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:43,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:43,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-21 13:26:43,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986451876] [2021-08-21 13:26:43,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:26:43,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:43,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:26:43,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:26:43,404 INFO L87 Difference]: Start difference. First operand 1529 states and 4374 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:44,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:44,348 INFO L93 Difference]: Finished difference Result 2008 states and 5650 transitions. [2021-08-21 13:26:44,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:26:44,349 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 13:26:44,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:44,351 INFO L225 Difference]: With dead ends: 2008 [2021-08-21 13:26:44,352 INFO L226 Difference]: Without dead ends: 1993 [2021-08-21 13:26:44,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 812.0ms TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:26:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-08-21 13:26:44,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1521. [2021-08-21 13:26:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.860526315789474) internal successors, (4348), 1520 states have internal predecessors, (4348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:44,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4348 transitions. [2021-08-21 13:26:44,369 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4348 transitions. Word has length 33 [2021-08-21 13:26:44,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:44,369 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 4348 transitions. [2021-08-21 13:26:44,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:44,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4348 transitions. [2021-08-21 13:26:44,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:26:44,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:44,370 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, 1, 1, 1, 1] [2021-08-21 13:26:44,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:44,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:44,571 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:44,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:44,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1529684551, now seen corresponding path program 80 times [2021-08-21 13:26:44,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:44,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160436686] [2021-08-21 13:26:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:44,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:44,844 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 13:26:44,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:44,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160436686] [2021-08-21 13:26:44,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160436686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:44,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226862097] [2021-08-21 13:26:44,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:26:44,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:44,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:44,846 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:44,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 13:26:50,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:26:50,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:50,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:26:50,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:50,511 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 5 treesize of output 3 [2021-08-21 13:26:50,959 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 13:26:50,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226862097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:50,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:50,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:26:50,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517045286] [2021-08-21 13:26:50,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:26:50,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:50,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:26:50,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:26:50,960 INFO L87 Difference]: Start difference. First operand 1521 states and 4348 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:52,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:52,053 INFO L93 Difference]: Finished difference Result 2089 states and 5825 transitions. [2021-08-21 13:26:52,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:26:52,053 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:26:52,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:52,056 INFO L225 Difference]: With dead ends: 2089 [2021-08-21 13:26:52,056 INFO L226 Difference]: Without dead ends: 2059 [2021-08-21 13:26:52,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1043.0ms TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:26:52,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-08-21 13:26:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1533. [2021-08-21 13:26:52,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 2.862924281984334) internal successors, (4386), 1532 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:52,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 4386 transitions. [2021-08-21 13:26:52,073 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 4386 transitions. Word has length 33 [2021-08-21 13:26:52,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:52,073 INFO L470 AbstractCegarLoop]: Abstraction has 1533 states and 4386 transitions. [2021-08-21 13:26:52,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:52,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 4386 transitions. [2021-08-21 13:26:52,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:26:52,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:52,075 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, 1, 1, 1, 1] [2021-08-21 13:26:52,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:52,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-08-21 13:26:52,276 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:52,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:52,276 INFO L82 PathProgramCache]: Analyzing trace with hash -136714035, now seen corresponding path program 81 times [2021-08-21 13:26:52,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:52,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416458728] [2021-08-21 13:26:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:52,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:52,529 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 13:26:52,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:52,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416458728] [2021-08-21 13:26:52,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416458728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:52,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550674650] [2021-08-21 13:26:52,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:26:52,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:52,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:52,530 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:52,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 13:26:57,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:26:57,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:57,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:26:57,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:58,635 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 13:26:58,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550674650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:58,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:58,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:26:58,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366892751] [2021-08-21 13:26:58,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:26:58,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:58,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:26:58,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:26:58,637 INFO L87 Difference]: Start difference. First operand 1533 states and 4386 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:59,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:59,255 INFO L93 Difference]: Finished difference Result 2274 states and 6386 transitions. [2021-08-21 13:26:59,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:26:59,256 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:26:59,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:59,259 INFO L225 Difference]: With dead ends: 2274 [2021-08-21 13:26:59,259 INFO L226 Difference]: Without dead ends: 2259 [2021-08-21 13:26:59,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 625.6ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:26:59,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-08-21 13:26:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1519. [2021-08-21 13:26:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.86034255599473) internal successors, (4342), 1518 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:59,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4342 transitions. [2021-08-21 13:26:59,278 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4342 transitions. Word has length 33 [2021-08-21 13:26:59,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:59,278 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 4342 transitions. [2021-08-21 13:26:59,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4342 transitions. [2021-08-21 13:26:59,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:26:59,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:59,280 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, 1, 1, 1, 1] [2021-08-21 13:26:59,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-21 13:26:59,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:59,480 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:59,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:59,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1558594751, now seen corresponding path program 82 times [2021-08-21 13:26:59,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:59,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4137386] [2021-08-21 13:26:59,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:59,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:59,732 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 13:26:59,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:59,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4137386] [2021-08-21 13:26:59,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4137386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:59,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141091401] [2021-08-21 13:26:59,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:26:59,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:59,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:59,733 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:59,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 13:27:05,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:27:05,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:05,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:27:05,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:05,805 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 13:27:05,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141091401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:05,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:05,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-21 13:27:05,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959960053] [2021-08-21 13:27:05,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:27:05,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:05,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:27:05,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:27:05,806 INFO L87 Difference]: Start difference. First operand 1519 states and 4342 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:06,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:06,508 INFO L93 Difference]: Finished difference Result 2479 states and 6940 transitions. [2021-08-21 13:27:06,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:27:06,508 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 13:27:06,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:06,512 INFO L225 Difference]: With dead ends: 2479 [2021-08-21 13:27:06,512 INFO L226 Difference]: Without dead ends: 2460 [2021-08-21 13:27:06,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 513.7ms TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:27:06,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-08-21 13:27:06,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 1523. [2021-08-21 13:27:06,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.862023653088042) internal successors, (4356), 1522 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:06,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4356 transitions. [2021-08-21 13:27:06,534 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4356 transitions. Word has length 33 [2021-08-21 13:27:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:06,534 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 4356 transitions. [2021-08-21 13:27:06,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4356 transitions. [2021-08-21 13:27:06,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:27:06,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:06,537 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, 1, 1, 1, 1] [2021-08-21 13:27:06,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:06,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:06,765 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:06,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:06,765 INFO L82 PathProgramCache]: Analyzing trace with hash -682412287, now seen corresponding path program 83 times [2021-08-21 13:27:06,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:06,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320169580] [2021-08-21 13:27:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:06,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:07,027 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 13:27:07,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:07,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320169580] [2021-08-21 13:27:07,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320169580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:07,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608448989] [2021-08-21 13:27:07,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:27:07,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:07,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:07,029 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:07,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 13:27:12,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:27:12,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:12,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:27:12,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:13,212 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 13:27:13,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608448989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:13,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:13,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-21 13:27:13,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101952233] [2021-08-21 13:27:13,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:27:13,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:13,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:27:13,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:27:13,213 INFO L87 Difference]: Start difference. First operand 1523 states and 4356 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:14,119 INFO L93 Difference]: Finished difference Result 2044 states and 5737 transitions. [2021-08-21 13:27:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:27:14,120 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 13:27:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:14,123 INFO L225 Difference]: With dead ends: 2044 [2021-08-21 13:27:14,123 INFO L226 Difference]: Without dead ends: 2029 [2021-08-21 13:27:14,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 753.4ms TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:27:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-08-21 13:27:14,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1511. [2021-08-21 13:27:14,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 2.8596026490066224) internal successors, (4318), 1510 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 4318 transitions. [2021-08-21 13:27:14,142 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 4318 transitions. Word has length 33 [2021-08-21 13:27:14,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:14,142 INFO L470 AbstractCegarLoop]: Abstraction has 1511 states and 4318 transitions. [2021-08-21 13:27:14,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:14,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 4318 transitions. [2021-08-21 13:27:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:27:14,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:14,144 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, 1, 1, 1, 1] [2021-08-21 13:27:14,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:14,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-08-21 13:27:14,345 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:14,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:14,345 INFO L82 PathProgramCache]: Analyzing trace with hash -553984637, now seen corresponding path program 84 times [2021-08-21 13:27:14,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:14,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243483892] [2021-08-21 13:27:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:14,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:14,658 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 13:27:14,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:14,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243483892] [2021-08-21 13:27:14,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243483892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:14,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505787993] [2021-08-21 13:27:14,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:27:14,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:14,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:14,660 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:14,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 13:27:20,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:27:20,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:20,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:27:20,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:20,596 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 5 treesize of output 3 [2021-08-21 13:27:21,061 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 13:27:21,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505787993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:21,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:21,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:27:21,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512587226] [2021-08-21 13:27:21,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:27:21,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:21,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:27:21,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:27:21,062 INFO L87 Difference]: Start difference. First operand 1511 states and 4318 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:22,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:22,200 INFO L93 Difference]: Finished difference Result 2034 states and 5661 transitions. [2021-08-21 13:27:22,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:27:22,201 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:27:22,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:22,203 INFO L225 Difference]: With dead ends: 2034 [2021-08-21 13:27:22,203 INFO L226 Difference]: Without dead ends: 2019 [2021-08-21 13:27:22,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1082.1ms TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:27:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-08-21 13:27:22,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1517. [2021-08-21 13:27:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 2.862796833773087) internal successors, (4340), 1516 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 4340 transitions. [2021-08-21 13:27:22,220 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 4340 transitions. Word has length 33 [2021-08-21 13:27:22,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:22,220 INFO L470 AbstractCegarLoop]: Abstraction has 1517 states and 4340 transitions. [2021-08-21 13:27:22,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:22,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 4340 transitions. [2021-08-21 13:27:22,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:27:22,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:22,222 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, 1, 1, 1, 1] [2021-08-21 13:27:22,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:22,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:22,423 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:22,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:22,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2074584073, now seen corresponding path program 85 times [2021-08-21 13:27:22,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:22,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995231160] [2021-08-21 13:27:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:22,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:22,798 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 13:27:22,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:22,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995231160] [2021-08-21 13:27:22,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995231160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:22,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147075610] [2021-08-21 13:27:22,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:27:22,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:22,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:22,800 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:22,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 13:27:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:28,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:27:28,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:27:29,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147075610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:29,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:29,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-21 13:27:29,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953479780] [2021-08-21 13:27:29,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:27:29,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:29,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:27:29,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:27:29,060 INFO L87 Difference]: Start difference. First operand 1517 states and 4340 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:29,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:29,548 INFO L93 Difference]: Finished difference Result 2295 states and 6421 transitions. [2021-08-21 13:27:29,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:27:29,548 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 13:27:29,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:29,551 INFO L225 Difference]: With dead ends: 2295 [2021-08-21 13:27:29,551 INFO L226 Difference]: Without dead ends: 2280 [2021-08-21 13:27:29,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 518.8ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:27:29,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-08-21 13:27:29,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1450. [2021-08-21 13:27:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 2.8612836438923397) internal successors, (4146), 1449 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 4146 transitions. [2021-08-21 13:27:29,569 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 4146 transitions. Word has length 33 [2021-08-21 13:27:29,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:29,569 INFO L470 AbstractCegarLoop]: Abstraction has 1450 states and 4146 transitions. [2021-08-21 13:27:29,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 4146 transitions. [2021-08-21 13:27:29,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 13:27:29,570 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:29,570 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:27:29,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:29,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:29,771 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:29,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:29,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1434777477, now seen corresponding path program 1 times [2021-08-21 13:27:29,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:29,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301234621] [2021-08-21 13:27:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:29,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:27:29,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:29,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301234621] [2021-08-21 13:27:29,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301234621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:29,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732477220] [2021-08-21 13:27:29,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:29,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:29,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:29,814 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:29,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 13:27:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:35,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 13:27:35,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:35,630 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 13:27:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:27:35,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732477220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:35,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:35,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 13:27:35,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396867989] [2021-08-21 13:27:35,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 13:27:35,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:35,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 13:27:35,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:27:35,709 INFO L87 Difference]: Start difference. First operand 1450 states and 4146 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:35,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:35,764 INFO L93 Difference]: Finished difference Result 1940 states and 5616 transitions. [2021-08-21 13:27:35,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:27:35,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 13:27:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:35,767 INFO L225 Difference]: With dead ends: 1940 [2021-08-21 13:27:35,767 INFO L226 Difference]: Without dead ends: 1940 [2021-08-21 13:27:35,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:27:35,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-08-21 13:27:35,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1810. [2021-08-21 13:27:35,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 2.902155887230514) internal successors, (5250), 1809 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 5250 transitions. [2021-08-21 13:27:35,787 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 5250 transitions. Word has length 37 [2021-08-21 13:27:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:35,787 INFO L470 AbstractCegarLoop]: Abstraction has 1810 states and 5250 transitions. [2021-08-21 13:27:35,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 5250 transitions. [2021-08-21 13:27:35,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 13:27:35,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:35,789 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:27:35,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:35,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-21 13:27:35,998 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:35,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:35,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1856254911, now seen corresponding path program 86 times [2021-08-21 13:27:35,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:35,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731615128] [2021-08-21 13:27:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:35,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:27:36,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:36,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731615128] [2021-08-21 13:27:36,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731615128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:36,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028077265] [2021-08-21 13:27:36,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:27:36,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:36,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:36,045 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:36,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 13:27:41,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:27:41,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:41,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 13:27:41,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:27:42,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028077265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:42,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:42,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-08-21 13:27:42,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138403489] [2021-08-21 13:27:42,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:27:42,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:42,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:27:42,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:27:42,095 INFO L87 Difference]: Start difference. First operand 1810 states and 5250 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:42,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:42,109 INFO L93 Difference]: Finished difference Result 2953 states and 8537 transitions. [2021-08-21 13:27:42,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:27:42,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 13:27:42,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:42,113 INFO L225 Difference]: With dead ends: 2953 [2021-08-21 13:27:42,113 INFO L226 Difference]: Without dead ends: 2856 [2021-08-21 13:27:42,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:27:42,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-08-21 13:27:42,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2284. [2021-08-21 13:27:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 2.9890494962768286) internal successors, (6824), 2283 states have internal predecessors, (6824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:42,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 6824 transitions. [2021-08-21 13:27:42,140 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 6824 transitions. Word has length 38 [2021-08-21 13:27:42,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:42,140 INFO L470 AbstractCegarLoop]: Abstraction has 2284 states and 6824 transitions. [2021-08-21 13:27:42,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:42,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 6824 transitions. [2021-08-21 13:27:42,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:27:42,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:42,143 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, 1, 1, 1, 1] [2021-08-21 13:27:42,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:42,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:42,343 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:42,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:42,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1630144413, now seen corresponding path program 87 times [2021-08-21 13:27:42,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:42,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097026455] [2021-08-21 13:27:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:42,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:27:42,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:42,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097026455] [2021-08-21 13:27:42,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097026455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:42,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642898234] [2021-08-21 13:27:42,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:27:42,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:42,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:42,383 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:42,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 13:27:48,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:27:48,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:48,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 13:27:48,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:27:48,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642898234] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:27:48,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 13:27:48,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-08-21 13:27:48,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668387254] [2021-08-21 13:27:48,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:27:48,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:48,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:27:48,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:27:48,301 INFO L87 Difference]: Start difference. First operand 2284 states and 6824 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 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 13:27:48,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:48,325 INFO L93 Difference]: Finished difference Result 6496 states and 19271 transitions. [2021-08-21 13:27:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:27:48,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 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 39 [2021-08-21 13:27:48,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:48,334 INFO L225 Difference]: With dead ends: 6496 [2021-08-21 13:27:48,335 INFO L226 Difference]: Without dead ends: 6091 [2021-08-21 13:27:48,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:27:48,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6091 states. [2021-08-21 13:27:48,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6091 to 5331. [2021-08-21 13:27:48,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5331 states, 5330 states have (on average 3.052908067542214) internal successors, (16272), 5330 states have internal predecessors, (16272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5331 states to 5331 states and 16272 transitions. [2021-08-21 13:27:48,406 INFO L78 Accepts]: Start accepts. Automaton has 5331 states and 16272 transitions. Word has length 39 [2021-08-21 13:27:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:48,406 INFO L470 AbstractCegarLoop]: Abstraction has 5331 states and 16272 transitions. [2021-08-21 13:27:48,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 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 13:27:48,406 INFO L276 IsEmpty]: Start isEmpty. Operand 5331 states and 16272 transitions. [2021-08-21 13:27:48,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 13:27:48,413 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:48,413 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:27:48,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:48,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:48,625 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1568623265, now seen corresponding path program 2 times [2021-08-21 13:27:48,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:48,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300329648] [2021-08-21 13:27:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:48,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:27:48,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:48,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300329648] [2021-08-21 13:27:48,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300329648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:48,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502697828] [2021-08-21 13:27:48,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:27:48,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:48,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:48,724 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:48,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 13:27:54,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:27:54,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:54,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 13:27:54,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:54,654 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 13:27:54,695 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 11 treesize of output 7 [2021-08-21 13:27:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:27:54,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502697828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:54,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:54,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-21 13:27:54,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087338152] [2021-08-21 13:27:54,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:27:54,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:54,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:27:54,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:27:54,759 INFO L87 Difference]: Start difference. First operand 5331 states and 16272 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:54,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:54,972 INFO L93 Difference]: Finished difference Result 7486 states and 22666 transitions. [2021-08-21 13:27:54,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 13:27:54,973 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 13:27:54,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:54,985 INFO L225 Difference]: With dead ends: 7486 [2021-08-21 13:27:54,986 INFO L226 Difference]: Without dead ends: 7486 [2021-08-21 13:27:54,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:27:54,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7486 states. [2021-08-21 13:27:55,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7486 to 6990. [2021-08-21 13:27:55,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6990 states, 6989 states have (on average 3.0479324653026185) internal successors, (21302), 6989 states have internal predecessors, (21302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6990 states to 6990 states and 21302 transitions. [2021-08-21 13:27:55,104 INFO L78 Accepts]: Start accepts. Automaton has 6990 states and 21302 transitions. Word has length 43 [2021-08-21 13:27:55,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:55,104 INFO L470 AbstractCegarLoop]: Abstraction has 6990 states and 21302 transitions. [2021-08-21 13:27:55,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:55,104 INFO L276 IsEmpty]: Start isEmpty. Operand 6990 states and 21302 transitions. [2021-08-21 13:27:55,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:27:55,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:55,117 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:27:55,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:55,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:55,333 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1131601065, now seen corresponding path program 3 times [2021-08-21 13:27:55,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:55,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290712621] [2021-08-21 13:27:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:55,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:27:56,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:56,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290712621] [2021-08-21 13:27:56,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290712621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:56,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263712115] [2021-08-21 13:27:56,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:27:56,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:56,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:56,165 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:56,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 13:28:02,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:28:02,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:02,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 13:28:02,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:02,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:28:02,718 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 13:28:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:03,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263712115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:03,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:03,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:28:03,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254476794] [2021-08-21 13:28:03,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:28:03,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:03,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:28:03,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1508, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:28:03,518 INFO L87 Difference]: Start difference. First operand 6990 states and 21302 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:05,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:05,358 INFO L93 Difference]: Finished difference Result 9371 states and 28152 transitions. [2021-08-21 13:28:05,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 13:28:05,358 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:28:05,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:05,374 INFO L225 Difference]: With dead ends: 9371 [2021-08-21 13:28:05,375 INFO L226 Difference]: Without dead ends: 9227 [2021-08-21 13:28:05,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1916.6ms TimeCoverageRelationStatistics Valid=307, Invalid=3599, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 13:28:05,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9227 states. [2021-08-21 13:28:05,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9227 to 7110. [2021-08-21 13:28:05,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7110 states, 7109 states have (on average 3.039668026445351) internal successors, (21609), 7109 states have internal predecessors, (21609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:05,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7110 states to 7110 states and 21609 transitions. [2021-08-21 13:28:05,495 INFO L78 Accepts]: Start accepts. Automaton has 7110 states and 21609 transitions. Word has length 48 [2021-08-21 13:28:05,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:05,495 INFO L470 AbstractCegarLoop]: Abstraction has 7110 states and 21609 transitions. [2021-08-21 13:28:05,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 7110 states and 21609 transitions. [2021-08-21 13:28:05,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:28:05,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:05,505 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:05,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:05,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-08-21 13:28:05,705 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:05,706 INFO L82 PathProgramCache]: Analyzing trace with hash 362868969, now seen corresponding path program 4 times [2021-08-21 13:28:05,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:05,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939541275] [2021-08-21 13:28:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:05,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:06,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:06,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939541275] [2021-08-21 13:28:06,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939541275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:06,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747851985] [2021-08-21 13:28:06,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:28:06,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:06,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:06,533 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:06,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 13:28:12,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:28:12,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:12,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 13:28:12,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:12,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:28:13,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:28:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:13,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747851985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:13,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:13,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:28:13,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965264257] [2021-08-21 13:28:13,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:28:13,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:13,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:28:13,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:28:13,952 INFO L87 Difference]: Start difference. First operand 7110 states and 21609 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:15,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:15,569 INFO L93 Difference]: Finished difference Result 9329 states and 28074 transitions. [2021-08-21 13:28:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 13:28:15,569 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:28:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:15,586 INFO L225 Difference]: With dead ends: 9329 [2021-08-21 13:28:15,586 INFO L226 Difference]: Without dead ends: 9294 [2021-08-21 13:28:15,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1803.8ms TimeCoverageRelationStatistics Valid=277, Invalid=3383, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 13:28:15,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9294 states. [2021-08-21 13:28:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9294 to 7122. [2021-08-21 13:28:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7122 states, 7121 states have (on average 3.0386181716051115) internal successors, (21638), 7121 states have internal predecessors, (21638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:15,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7122 states to 7122 states and 21638 transitions. [2021-08-21 13:28:15,756 INFO L78 Accepts]: Start accepts. Automaton has 7122 states and 21638 transitions. Word has length 48 [2021-08-21 13:28:15,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:15,756 INFO L470 AbstractCegarLoop]: Abstraction has 7122 states and 21638 transitions. [2021-08-21 13:28:15,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:15,757 INFO L276 IsEmpty]: Start isEmpty. Operand 7122 states and 21638 transitions. [2021-08-21 13:28:15,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:28:15,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:15,766 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:15,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 13:28:15,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:15,967 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:15,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:15,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1239051433, now seen corresponding path program 5 times [2021-08-21 13:28:15,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:15,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022820497] [2021-08-21 13:28:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:15,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:16,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:16,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022820497] [2021-08-21 13:28:16,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022820497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:16,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998718136] [2021-08-21 13:28:16,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:28:16,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:16,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:16,821 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:16,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 13:28:22,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:28:22,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:22,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 13:28:22,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:23,157 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 13:28:23,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:28:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:24,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998718136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:24,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:24,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:28:24,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430871906] [2021-08-21 13:28:24,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:28:24,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:24,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:28:24,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:28:24,321 INFO L87 Difference]: Start difference. First operand 7122 states and 21638 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:26,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:26,296 INFO L93 Difference]: Finished difference Result 8081 states and 24502 transitions. [2021-08-21 13:28:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 13:28:26,296 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:28:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:26,309 INFO L225 Difference]: With dead ends: 8081 [2021-08-21 13:28:26,309 INFO L226 Difference]: Without dead ends: 8037 [2021-08-21 13:28:26,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 2044.9ms TimeCoverageRelationStatistics Valid=309, Invalid=3473, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 13:28:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8037 states. [2021-08-21 13:28:26,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8037 to 7118. [2021-08-21 13:28:26,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7118 states, 7117 states have (on average 3.038780384993677) internal successors, (21627), 7117 states have internal predecessors, (21627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7118 states to 7118 states and 21627 transitions. [2021-08-21 13:28:26,429 INFO L78 Accepts]: Start accepts. Automaton has 7118 states and 21627 transitions. Word has length 48 [2021-08-21 13:28:26,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:26,429 INFO L470 AbstractCegarLoop]: Abstraction has 7118 states and 21627 transitions. [2021-08-21 13:28:26,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:26,429 INFO L276 IsEmpty]: Start isEmpty. Operand 7118 states and 21627 transitions. [2021-08-21 13:28:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:28:26,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:26,438 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:26,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:26,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:26,639 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:26,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:26,639 INFO L82 PathProgramCache]: Analyzing trace with hash 504584109, now seen corresponding path program 6 times [2021-08-21 13:28:26,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:26,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067325211] [2021-08-21 13:28:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:26,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:27,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:27,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067325211] [2021-08-21 13:28:27,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067325211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:27,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660026213] [2021-08-21 13:28:27,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:28:27,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:27,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:27,477 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:27,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 13:28:33,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:28:33,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:33,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 13:28:33,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:33,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:28:34,295 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 13:28:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:35,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660026213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:35,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:35,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:28:35,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67410879] [2021-08-21 13:28:35,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:28:35,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:35,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:28:35,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1508, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:28:35,116 INFO L87 Difference]: Start difference. First operand 7118 states and 21627 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:36,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:36,840 INFO L93 Difference]: Finished difference Result 9350 states and 28063 transitions. [2021-08-21 13:28:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:28:36,841 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:28:36,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:36,857 INFO L225 Difference]: With dead ends: 9350 [2021-08-21 13:28:36,857 INFO L226 Difference]: Without dead ends: 9293 [2021-08-21 13:28:36,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1851.4ms TimeCoverageRelationStatistics Valid=302, Invalid=3480, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 13:28:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9293 states. [2021-08-21 13:28:37,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9293 to 7124. [2021-08-21 13:28:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7124 states, 7123 states have (on average 3.0380457672329073) internal successors, (21640), 7123 states have internal predecessors, (21640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:37,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7124 states to 7124 states and 21640 transitions. [2021-08-21 13:28:37,029 INFO L78 Accepts]: Start accepts. Automaton has 7124 states and 21640 transitions. Word has length 48 [2021-08-21 13:28:37,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:37,029 INFO L470 AbstractCegarLoop]: Abstraction has 7124 states and 21640 transitions. [2021-08-21 13:28:37,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:37,029 INFO L276 IsEmpty]: Start isEmpty. Operand 7124 states and 21640 transitions. [2021-08-21 13:28:37,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:28:37,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:37,041 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:37,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:37,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:37,265 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:37,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:37,265 INFO L82 PathProgramCache]: Analyzing trace with hash -778563351, now seen corresponding path program 7 times [2021-08-21 13:28:37,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:37,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542603454] [2021-08-21 13:28:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:37,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:38,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:38,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542603454] [2021-08-21 13:28:38,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542603454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:38,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611953562] [2021-08-21 13:28:38,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:28:38,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:38,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:38,070 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:38,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 13:28:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:44,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 13:28:44,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:44,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:28:44,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:28:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:45,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611953562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:45,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:45,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:28:45,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584008583] [2021-08-21 13:28:45,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:28:45,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:45,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:28:45,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:28:45,760 INFO L87 Difference]: Start difference. First operand 7124 states and 21640 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:47,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:47,388 INFO L93 Difference]: Finished difference Result 9305 states and 27967 transitions. [2021-08-21 13:28:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:28:47,388 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:28:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:47,405 INFO L225 Difference]: With dead ends: 9305 [2021-08-21 13:28:47,405 INFO L226 Difference]: Without dead ends: 9211 [2021-08-21 13:28:47,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 1724.1ms TimeCoverageRelationStatistics Valid=271, Invalid=3269, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:28:47,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9211 states. [2021-08-21 13:28:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9211 to 7104. [2021-08-21 13:28:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7104 states, 7103 states have (on average 3.040546248064198) internal successors, (21597), 7103 states have internal predecessors, (21597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7104 states to 7104 states and 21597 transitions. [2021-08-21 13:28:47,546 INFO L78 Accepts]: Start accepts. Automaton has 7104 states and 21597 transitions. Word has length 48 [2021-08-21 13:28:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:47,547 INFO L470 AbstractCegarLoop]: Abstraction has 7104 states and 21597 transitions. [2021-08-21 13:28:47,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 7104 states and 21597 transitions. [2021-08-21 13:28:47,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:28:47,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:47,564 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:47,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:47,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:47,781 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:47,781 INFO L82 PathProgramCache]: Analyzing trace with hash 236808205, now seen corresponding path program 8 times [2021-08-21 13:28:47,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:47,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140973784] [2021-08-21 13:28:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:47,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:48,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:48,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140973784] [2021-08-21 13:28:48,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140973784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:48,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506457990] [2021-08-21 13:28:48,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:28:48,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:48,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:48,632 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:48,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 13:28:54,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:28:54,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:54,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 13:28:54,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:55,246 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 13:28:55,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:28:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:56,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506457990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:56,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:56,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:28:56,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182267374] [2021-08-21 13:28:56,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:28:56,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:56,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:28:56,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:28:56,396 INFO L87 Difference]: Start difference. First operand 7104 states and 21597 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:58,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:58,353 INFO L93 Difference]: Finished difference Result 9439 states and 28296 transitions. [2021-08-21 13:28:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 13:28:58,354 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:28:58,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:58,370 INFO L225 Difference]: With dead ends: 9439 [2021-08-21 13:28:58,371 INFO L226 Difference]: Without dead ends: 9295 [2021-08-21 13:28:58,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1885.6ms TimeCoverageRelationStatistics Valid=276, Invalid=3384, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 13:28:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9295 states. [2021-08-21 13:28:58,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9295 to 7164. [2021-08-21 13:28:58,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7164 states, 7163 states have (on average 3.034063939690074) internal successors, (21733), 7163 states have internal predecessors, (21733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7164 states to 7164 states and 21733 transitions. [2021-08-21 13:28:58,510 INFO L78 Accepts]: Start accepts. Automaton has 7164 states and 21733 transitions. Word has length 48 [2021-08-21 13:28:58,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:58,510 INFO L470 AbstractCegarLoop]: Abstraction has 7164 states and 21733 transitions. [2021-08-21 13:28:58,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:58,510 INFO L276 IsEmpty]: Start isEmpty. Operand 7164 states and 21733 transitions. [2021-08-21 13:28:58,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:28:58,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:58,525 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:58,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:58,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-21 13:28:58,741 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:58,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:58,741 INFO L82 PathProgramCache]: Analyzing trace with hash 201175157, now seen corresponding path program 9 times [2021-08-21 13:28:58,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:58,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990877070] [2021-08-21 13:28:58,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:58,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:59,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:59,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990877070] [2021-08-21 13:28:59,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990877070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:59,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856060326] [2021-08-21 13:28:59,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:28:59,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:59,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:59,651 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:59,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 13:29:06,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:29:06,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:06,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 13:29:06,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:06,386 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 13:29:06,716 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 13:29:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:29:07,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856060326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:07,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:07,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:29:07,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242893362] [2021-08-21 13:29:07,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:29:07,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:07,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:29:07,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:29:07,588 INFO L87 Difference]: Start difference. First operand 7164 states and 21733 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:09,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:09,512 INFO L93 Difference]: Finished difference Result 8182 states and 24723 transitions. [2021-08-21 13:29:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:29:09,513 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:29:09,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:09,526 INFO L225 Difference]: With dead ends: 8182 [2021-08-21 13:29:09,527 INFO L226 Difference]: Without dead ends: 8142 [2021-08-21 13:29:09,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 2165.6ms TimeCoverageRelationStatistics Valid=315, Invalid=3591, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 13:29:09,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8142 states. [2021-08-21 13:29:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8142 to 7182. [2021-08-21 13:29:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7181 states have (on average 3.0327252471800583) internal successors, (21778), 7181 states have internal predecessors, (21778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 21778 transitions. [2021-08-21 13:29:09,638 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 21778 transitions. Word has length 48 [2021-08-21 13:29:09,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:09,638 INFO L470 AbstractCegarLoop]: Abstraction has 7182 states and 21778 transitions. [2021-08-21 13:29:09,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:09,639 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 21778 transitions. [2021-08-21 13:29:09,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:29:09,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:09,648 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:29:09,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 13:29:09,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-08-21 13:29:09,849 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:09,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:09,849 INFO L82 PathProgramCache]: Analyzing trace with hash -27583687, now seen corresponding path program 10 times [2021-08-21 13:29:09,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:09,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009416861] [2021-08-21 13:29:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:09,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:29:10,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:10,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009416861] [2021-08-21 13:29:10,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009416861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:10,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357501595] [2021-08-21 13:29:10,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:29:10,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:10,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:10,822 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:29:10,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 13:29:17,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:29:17,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:17,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 13:29:17,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:17,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:29:17,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:29:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:29:18,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357501595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:18,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:18,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:29:18,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220976958] [2021-08-21 13:29:18,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:29:18,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:18,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:29:18,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:29:18,697 INFO L87 Difference]: Start difference. First operand 7182 states and 21778 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:20,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:20,513 INFO L93 Difference]: Finished difference Result 9375 states and 28170 transitions. [2021-08-21 13:29:20,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 13:29:20,514 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:29:20,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:20,562 INFO L225 Difference]: With dead ends: 9375 [2021-08-21 13:29:20,563 INFO L226 Difference]: Without dead ends: 9330 [2021-08-21 13:29:20,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 1885.0ms TimeCoverageRelationStatistics Valid=277, Invalid=3383, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 13:29:20,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-08-21 13:29:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 7176. [2021-08-21 13:29:20,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7175 states have (on average 3.0326132404181183) internal successors, (21759), 7175 states have internal predecessors, (21759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:20,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 21759 transitions. [2021-08-21 13:29:20,686 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 21759 transitions. Word has length 48 [2021-08-21 13:29:20,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:20,686 INFO L470 AbstractCegarLoop]: Abstraction has 7176 states and 21759 transitions. [2021-08-21 13:29:20,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:20,687 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 21759 transitions. [2021-08-21 13:29:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:29:20,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:20,697 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:29:20,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 13:29:20,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-21 13:29:20,897 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:20,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:20,898 INFO L82 PathProgramCache]: Analyzing trace with hash -974315487, now seen corresponding path program 11 times [2021-08-21 13:29:20,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:20,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665136144] [2021-08-21 13:29:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:20,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:29:21,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:21,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665136144] [2021-08-21 13:29:21,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665136144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:21,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004017080] [2021-08-21 13:29:21,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:29:21,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:21,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:21,652 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:29:21,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 13:29:28,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:29:28,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:28,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 13:29:28,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:28,699 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 13:29:29,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:29:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:29:29,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004017080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:29,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:29,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:29:29,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557955602] [2021-08-21 13:29:29,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:29:29,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:29,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:29:29,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:29:29,753 INFO L87 Difference]: Start difference. First operand 7176 states and 21759 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:31,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:31,524 INFO L93 Difference]: Finished difference Result 9432 states and 28244 transitions. [2021-08-21 13:29:31,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:29:31,525 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:29:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:31,542 INFO L225 Difference]: With dead ends: 9432 [2021-08-21 13:29:31,542 INFO L226 Difference]: Without dead ends: 9373 [2021-08-21 13:29:31,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1668.6ms TimeCoverageRelationStatistics Valid=271, Invalid=3269, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:29:31,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9373 states. [2021-08-21 13:29:31,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9373 to 7182. [2021-08-21 13:29:31,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7181 states have (on average 3.0318897089541847) internal successors, (21772), 7181 states have internal predecessors, (21772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 21772 transitions. [2021-08-21 13:29:31,699 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 21772 transitions. Word has length 48 [2021-08-21 13:29:31,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:31,699 INFO L470 AbstractCegarLoop]: Abstraction has 7182 states and 21772 transitions. [2021-08-21 13:29:31,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:31,699 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 21772 transitions. [2021-08-21 13:29:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:29:31,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:31,709 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:29:31,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-21 13:29:31,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:31,910 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:31,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:31,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1128753005, now seen corresponding path program 12 times [2021-08-21 13:29:31,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:31,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730787972] [2021-08-21 13:29:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:31,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:29:32,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:32,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730787972] [2021-08-21 13:29:32,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730787972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:32,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165067016] [2021-08-21 13:29:32,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:29:32,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:32,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:32,766 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:29:32,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 13:29:39,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:29:39,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:39,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 13:29:39,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:39,857 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 13:29:40,331 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 13:29:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:29:41,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165067016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:41,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:41,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2021-08-21 13:29:41,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389445353] [2021-08-21 13:29:41,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 13:29:41,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:41,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 13:29:41,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1667, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 13:29:41,159 INFO L87 Difference]: Start difference. First operand 7182 states and 21772 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:42,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:42,848 INFO L93 Difference]: Finished difference Result 9379 states and 28131 transitions. [2021-08-21 13:29:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:29:42,848 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:29:42,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:42,865 INFO L225 Difference]: With dead ends: 9379 [2021-08-21 13:29:42,865 INFO L226 Difference]: Without dead ends: 9223 [2021-08-21 13:29:42,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1907.1ms TimeCoverageRelationStatistics Valid=298, Invalid=3734, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 13:29:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9223 states. [2021-08-21 13:29:42,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9223 to 7116. [2021-08-21 13:29:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7116 states, 7115 states have (on average 3.036261419536191) internal successors, (21603), 7115 states have internal predecessors, (21603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:42,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 21603 transitions. [2021-08-21 13:29:42,995 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 21603 transitions. Word has length 48 [2021-08-21 13:29:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:42,995 INFO L470 AbstractCegarLoop]: Abstraction has 7116 states and 21603 transitions. [2021-08-21 13:29:42,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 21603 transitions. [2021-08-21 13:29:43,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:29:43,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:43,005 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:29:43,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 13:29:43,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-21 13:29:43,206 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:43,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:43,206 INFO L82 PathProgramCache]: Analyzing trace with hash 766644457, now seen corresponding path program 13 times [2021-08-21 13:29:43,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:43,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668992083] [2021-08-21 13:29:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:43,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:29:44,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:44,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668992083] [2021-08-21 13:29:44,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668992083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:44,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083573286] [2021-08-21 13:29:44,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:29:44,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:44,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:44,027 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:29:44,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 13:29:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:50,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 13:29:50,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:51,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:29:51,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:29:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:29:52,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083573286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:52,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:52,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:29:52,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594493263] [2021-08-21 13:29:52,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:29:52,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:52,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:29:52,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:29:52,366 INFO L87 Difference]: Start difference. First operand 7116 states and 21603 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:54,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:54,374 INFO L93 Difference]: Finished difference Result 8090 states and 24505 transitions. [2021-08-21 13:29:54,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:29:54,375 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:29:54,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:54,389 INFO L225 Difference]: With dead ends: 8090 [2021-08-21 13:29:54,389 INFO L226 Difference]: Without dead ends: 8055 [2021-08-21 13:29:54,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1918.6ms TimeCoverageRelationStatistics Valid=302, Invalid=3358, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 13:29:54,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8055 states. [2021-08-21 13:29:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8055 to 7124. [2021-08-21 13:29:54,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7124 states, 7123 states have (on average 3.0355187421030463) internal successors, (21622), 7123 states have internal predecessors, (21622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:54,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7124 states to 7124 states and 21622 transitions. [2021-08-21 13:29:54,495 INFO L78 Accepts]: Start accepts. Automaton has 7124 states and 21622 transitions. Word has length 48 [2021-08-21 13:29:54,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:54,495 INFO L470 AbstractCegarLoop]: Abstraction has 7124 states and 21622 transitions. [2021-08-21 13:29:54,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:54,495 INFO L276 IsEmpty]: Start isEmpty. Operand 7124 states and 21622 transitions. [2021-08-21 13:29:54,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:29:54,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:54,505 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:29:54,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 13:29:54,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:54,705 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:54,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:54,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1642826921, now seen corresponding path program 14 times [2021-08-21 13:29:54,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:54,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712922234] [2021-08-21 13:29:54,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:54,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:29:55,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:55,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712922234] [2021-08-21 13:29:55,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712922234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:55,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300580810] [2021-08-21 13:29:55,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:29:55,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:55,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:55,538 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:29:55,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 13:30:02,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:30:02,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:02,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 13:30:02,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:02,828 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 13:30:03,139 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 13:30:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:30:04,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300580810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:04,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:04,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:30:04,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762089189] [2021-08-21 13:30:04,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:30:04,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:04,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:30:04,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:30:04,009 INFO L87 Difference]: Start difference. First operand 7124 states and 21622 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:06,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:06,057 INFO L93 Difference]: Finished difference Result 8124 states and 24566 transitions. [2021-08-21 13:30:06,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 13:30:06,058 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:30:06,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:06,073 INFO L225 Difference]: With dead ends: 8124 [2021-08-21 13:30:06,073 INFO L226 Difference]: Without dead ends: 8080 [2021-08-21 13:30:06,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 2009.2ms TimeCoverageRelationStatistics Valid=327, Invalid=3455, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 13:30:06,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8080 states. [2021-08-21 13:30:06,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8080 to 7120. [2021-08-21 13:30:06,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.0361005759235846) internal successors, (21614), 7119 states have internal predecessors, (21614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:06,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21614 transitions. [2021-08-21 13:30:06,190 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21614 transitions. Word has length 48 [2021-08-21 13:30:06,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:06,190 INFO L470 AbstractCegarLoop]: Abstraction has 7120 states and 21614 transitions. [2021-08-21 13:30:06,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:06,190 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21614 transitions. [2021-08-21 13:30:06,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:30:06,203 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:06,203 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:30:06,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 13:30:06,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 13:30:06,405 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:30:06,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:06,405 INFO L82 PathProgramCache]: Analyzing trace with hash -460309207, now seen corresponding path program 15 times [2021-08-21 13:30:06,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:06,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587039754] [2021-08-21 13:30:06,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:06,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:30:07,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:07,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587039754] [2021-08-21 13:30:07,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587039754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:07,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033782271] [2021-08-21 13:30:07,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:30:07,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:07,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:07,200 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:30:07,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 13:30:14,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:30:14,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:14,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 13:30:14,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:14,779 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 13:30:15,116 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 13:30:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:30:15,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033782271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:15,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:15,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:30:15,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483588122] [2021-08-21 13:30:15,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:30:15,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:15,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:30:15,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:30:15,909 INFO L87 Difference]: Start difference. First operand 7120 states and 21614 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:17,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:17,713 INFO L93 Difference]: Finished difference Result 9313 states and 28008 transitions. [2021-08-21 13:30:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:30:17,714 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:30:17,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:17,731 INFO L225 Difference]: With dead ends: 9313 [2021-08-21 13:30:17,731 INFO L226 Difference]: Without dead ends: 9278 [2021-08-21 13:30:17,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 1774.5ms TimeCoverageRelationStatistics Valid=273, Invalid=3267, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:30:17,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9278 states. [2021-08-21 13:30:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9278 to 7124. [2021-08-21 13:30:17,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7124 states, 7123 states have (on average 3.0355187421030463) internal successors, (21622), 7123 states have internal predecessors, (21622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7124 states to 7124 states and 21622 transitions. [2021-08-21 13:30:17,863 INFO L78 Accepts]: Start accepts. Automaton has 7124 states and 21622 transitions. Word has length 48 [2021-08-21 13:30:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:17,863 INFO L470 AbstractCegarLoop]: Abstraction has 7124 states and 21622 transitions. [2021-08-21 13:30:17,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7124 states and 21622 transitions. [2021-08-21 13:30:17,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:30:17,874 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:17,874 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:30:17,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 13:30:18,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:18,075 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:30:18,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:18,075 INFO L82 PathProgramCache]: Analyzing trace with hash 2001740685, now seen corresponding path program 16 times [2021-08-21 13:30:18,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:18,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227720937] [2021-08-21 13:30:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:18,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:30:18,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:18,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227720937] [2021-08-21 13:30:18,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227720937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:18,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907760528] [2021-08-21 13:30:18,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:30:18,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:18,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:18,818 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:30:18,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 13:30:26,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:30:26,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:26,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 13:30:26,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:26,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:30:26,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:30:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:30:27,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907760528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:27,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:27,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:30:27,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938002904] [2021-08-21 13:30:27,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:30:27,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:27,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:30:27,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:30:27,588 INFO L87 Difference]: Start difference. First operand 7124 states and 21622 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:29,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:29,153 INFO L93 Difference]: Finished difference Result 9317 states and 28014 transitions. [2021-08-21 13:30:29,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:30:29,153 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:30:29,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:29,171 INFO L225 Difference]: With dead ends: 9317 [2021-08-21 13:30:29,171 INFO L226 Difference]: Without dead ends: 9274 [2021-08-21 13:30:29,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1697.2ms TimeCoverageRelationStatistics Valid=273, Invalid=3267, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:30:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9274 states. [2021-08-21 13:30:29,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9274 to 7120. [2021-08-21 13:30:29,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.035819637589549) internal successors, (21612), 7119 states have internal predecessors, (21612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21612 transitions. [2021-08-21 13:30:29,302 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21612 transitions. Word has length 48 [2021-08-21 13:30:29,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:29,303 INFO L470 AbstractCegarLoop]: Abstraction has 7120 states and 21612 transitions. [2021-08-21 13:30:29,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21612 transitions. [2021-08-21 13:30:29,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:30:29,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:29,313 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:30:29,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 13:30:29,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-08-21 13:30:29,514 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:30:29,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:29,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1145793037, now seen corresponding path program 17 times [2021-08-21 13:30:29,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:29,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643206153] [2021-08-21 13:30:29,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:29,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:30:30,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:30,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643206153] [2021-08-21 13:30:30,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643206153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:30,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271621579] [2021-08-21 13:30:30,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:30:30,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:30,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:30,392 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:30:30,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 13:30:37,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:30:37,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:37,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 13:30:37,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:38,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 13:30:38,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:30:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:30:39,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271621579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:39,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:39,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:30:39,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242134441] [2021-08-21 13:30:39,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:30:39,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:39,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:30:39,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:30:39,249 INFO L87 Difference]: Start difference. First operand 7120 states and 21612 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:41,179 INFO L93 Difference]: Finished difference Result 8126 states and 24570 transitions. [2021-08-21 13:30:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 13:30:41,179 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:30:41,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:41,194 INFO L225 Difference]: With dead ends: 8126 [2021-08-21 13:30:41,194 INFO L226 Difference]: Without dead ends: 8086 [2021-08-21 13:30:41,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 2104.2ms TimeCoverageRelationStatistics Valid=327, Invalid=3455, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 13:30:41,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8086 states. [2021-08-21 13:30:41,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8086 to 7126. [2021-08-21 13:30:41,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7126 states, 7125 states have (on average 3.0350877192982457) internal successors, (21625), 7125 states have internal predecessors, (21625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7126 states to 7126 states and 21625 transitions. [2021-08-21 13:30:41,305 INFO L78 Accepts]: Start accepts. Automaton has 7126 states and 21625 transitions. Word has length 48 [2021-08-21 13:30:41,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:41,305 INFO L470 AbstractCegarLoop]: Abstraction has 7126 states and 21625 transitions. [2021-08-21 13:30:41,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:41,305 INFO L276 IsEmpty]: Start isEmpty. Operand 7126 states and 21625 transitions. [2021-08-21 13:30:41,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:30:41,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:41,315 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:30:41,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 13:30:41,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:41,516 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:30:41,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:41,516 INFO L82 PathProgramCache]: Analyzing trace with hash -520605549, now seen corresponding path program 18 times [2021-08-21 13:30:41,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:41,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395511546] [2021-08-21 13:30:41,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:41,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:30:42,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:42,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395511546] [2021-08-21 13:30:42,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395511546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:42,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223096062] [2021-08-21 13:30:42,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:30:42,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:42,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:42,394 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:30:42,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 13:30:49,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:30:49,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:49,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 13:30:49,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:50,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:30:50,452 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 13:30:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:30:51,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223096062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:51,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:51,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:30:51,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499097721] [2021-08-21 13:30:51,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:30:51,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:51,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:30:51,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:30:51,230 INFO L87 Difference]: Start difference. First operand 7126 states and 21625 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:53,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:53,008 INFO L93 Difference]: Finished difference Result 8084 states and 24484 transitions. [2021-08-21 13:30:53,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:30:53,009 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:30:53,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:53,025 INFO L225 Difference]: With dead ends: 8084 [2021-08-21 13:30:53,025 INFO L226 Difference]: Without dead ends: 8037 [2021-08-21 13:30:53,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 2042.6ms TimeCoverageRelationStatistics Valid=333, Invalid=3573, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 13:30:53,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8037 states. [2021-08-21 13:30:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8037 to 7118. [2021-08-21 13:30:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7118 states, 7117 states have (on average 3.0359702121680483) internal successors, (21607), 7117 states have internal predecessors, (21607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:53,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7118 states to 7118 states and 21607 transitions. [2021-08-21 13:30:53,149 INFO L78 Accepts]: Start accepts. Automaton has 7118 states and 21607 transitions. Word has length 48 [2021-08-21 13:30:53,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:53,150 INFO L470 AbstractCegarLoop]: Abstraction has 7118 states and 21607 transitions. [2021-08-21 13:30:53,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:53,150 INFO L276 IsEmpty]: Start isEmpty. Operand 7118 states and 21607 transitions. [2021-08-21 13:30:53,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:30:53,160 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:53,160 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:30:53,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 13:30:53,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:53,361 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:30:53,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:53,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1406766659, now seen corresponding path program 19 times [2021-08-21 13:30:53,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:53,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957973673] [2021-08-21 13:30:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:53,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:30:54,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:54,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957973673] [2021-08-21 13:30:54,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957973673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:54,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745146862] [2021-08-21 13:30:54,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:30:54,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:54,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:54,130 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:30:54,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 13:31:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:01,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 13:31:01,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:02,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:31:02,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:31:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:31:03,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745146862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:03,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:03,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:31:03,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606535217] [2021-08-21 13:31:03,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:31:03,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:03,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:31:03,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:31:03,096 INFO L87 Difference]: Start difference. First operand 7118 states and 21607 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:04,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:04,886 INFO L93 Difference]: Finished difference Result 9370 states and 28127 transitions. [2021-08-21 13:31:04,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:31:04,886 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:31:04,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:04,902 INFO L225 Difference]: With dead ends: 9370 [2021-08-21 13:31:04,902 INFO L226 Difference]: Without dead ends: 9335 [2021-08-21 13:31:04,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1739.2ms TimeCoverageRelationStatistics Valid=279, Invalid=3381, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 13:31:04,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9335 states. [2021-08-21 13:31:05,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9335 to 7126. [2021-08-21 13:31:05,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7126 states, 7125 states have (on average 3.0350877192982457) internal successors, (21625), 7125 states have internal predecessors, (21625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:05,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7126 states to 7126 states and 21625 transitions. [2021-08-21 13:31:05,024 INFO L78 Accepts]: Start accepts. Automaton has 7126 states and 21625 transitions. Word has length 48 [2021-08-21 13:31:05,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:05,025 INFO L470 AbstractCegarLoop]: Abstraction has 7126 states and 21625 transitions. [2021-08-21 13:31:05,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:05,025 INFO L276 IsEmpty]: Start isEmpty. Operand 7126 states and 21625 transitions. [2021-08-21 13:31:05,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:31:05,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:05,034 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:31:05,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-21 13:31:05,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-08-21 13:31:05,235 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:31:05,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:05,235 INFO L82 PathProgramCache]: Analyzing trace with hash -530584195, now seen corresponding path program 20 times [2021-08-21 13:31:05,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:05,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405910817] [2021-08-21 13:31:05,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:05,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:31:06,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:06,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405910817] [2021-08-21 13:31:06,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405910817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:06,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051455065] [2021-08-21 13:31:06,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:31:06,120 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:06,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:06,121 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:06,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 13:31:13,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:31:13,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:13,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 13:31:13,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:14,288 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 13:31:14,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 13:31:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:31:15,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051455065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:15,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:15,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:31:15,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567384530] [2021-08-21 13:31:15,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:31:15,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:15,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:31:15,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:31:15,443 INFO L87 Difference]: Start difference. First operand 7126 states and 21625 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:17,230 INFO L93 Difference]: Finished difference Result 8098 states and 24520 transitions. [2021-08-21 13:31:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:31:17,231 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:31:17,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:17,243 INFO L225 Difference]: With dead ends: 8098 [2021-08-21 13:31:17,243 INFO L226 Difference]: Without dead ends: 8037 [2021-08-21 13:31:17,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1956.4ms TimeCoverageRelationStatistics Valid=312, Invalid=3470, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 13:31:17,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8037 states. [2021-08-21 13:31:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8037 to 7118. [2021-08-21 13:31:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7118 states, 7117 states have (on average 3.0358297035267667) internal successors, (21606), 7117 states have internal predecessors, (21606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7118 states to 7118 states and 21606 transitions. [2021-08-21 13:31:17,344 INFO L78 Accepts]: Start accepts. Automaton has 7118 states and 21606 transitions. Word has length 48 [2021-08-21 13:31:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:17,344 INFO L470 AbstractCegarLoop]: Abstraction has 7118 states and 21606 transitions. [2021-08-21 13:31:17,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:17,345 INFO L276 IsEmpty]: Start isEmpty. Operand 7118 states and 21606 transitions. [2021-08-21 13:31:17,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:31:17,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:17,354 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:31:17,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-21 13:31:17,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:17,554 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:31:17,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:17,555 INFO L82 PathProgramCache]: Analyzing trace with hash 743387921, now seen corresponding path program 21 times [2021-08-21 13:31:17,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:17,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690380560] [2021-08-21 13:31:17,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:17,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:31:18,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:18,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690380560] [2021-08-21 13:31:18,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690380560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:18,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660710474] [2021-08-21 13:31:18,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:31:18,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:18,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:18,292 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:18,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 13:31:26,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:31:26,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:26,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 13:31:26,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:26,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 13:31:26,742 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 13:31:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:31:27,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660710474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:27,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:27,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:31:27,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713626191] [2021-08-21 13:31:27,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:31:27,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:27,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:31:27,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:31:27,566 INFO L87 Difference]: Start difference. First operand 7118 states and 21606 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:29,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:29,500 INFO L93 Difference]: Finished difference Result 8143 states and 24611 transitions. [2021-08-21 13:31:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 13:31:29,500 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:31:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:29,514 INFO L225 Difference]: With dead ends: 8143 [2021-08-21 13:31:29,514 INFO L226 Difference]: Without dead ends: 8090 [2021-08-21 13:31:29,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 2004.7ms TimeCoverageRelationStatistics Valid=321, Invalid=3585, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 13:31:29,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8090 states. [2021-08-21 13:31:29,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8090 to 7130. [2021-08-21 13:31:29,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7130 states, 7129 states have (on average 3.0343666713424042) internal successors, (21632), 7129 states have internal predecessors, (21632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:29,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7130 states to 7130 states and 21632 transitions. [2021-08-21 13:31:29,617 INFO L78 Accepts]: Start accepts. Automaton has 7130 states and 21632 transitions. Word has length 48 [2021-08-21 13:31:29,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:29,617 INFO L470 AbstractCegarLoop]: Abstraction has 7130 states and 21632 transitions. [2021-08-21 13:31:29,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:29,617 INFO L276 IsEmpty]: Start isEmpty. Operand 7130 states and 21632 transitions. [2021-08-21 13:31:29,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:31:29,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:29,627 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:31:29,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-21 13:31:29,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:29,827 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:31:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:29,828 INFO L82 PathProgramCache]: Analyzing trace with hash -923010665, now seen corresponding path program 22 times [2021-08-21 13:31:29,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:29,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830735948] [2021-08-21 13:31:29,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:29,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:31:30,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:30,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830735948] [2021-08-21 13:31:30,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830735948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:30,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820634644] [2021-08-21 13:31:30,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:31:30,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:30,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:30,691 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:30,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 13:31:38,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:31:38,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:38,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 13:31:38,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:38,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:31:39,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:31:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:31:39,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820634644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:39,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:39,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:31:39,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354312146] [2021-08-21 13:31:39,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:31:39,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:39,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:31:39,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:31:39,902 INFO L87 Difference]: Start difference. First operand 7130 states and 21632 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:41,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:41,535 INFO L93 Difference]: Finished difference Result 9323 states and 28024 transitions. [2021-08-21 13:31:41,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:31:41,535 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:31:41,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:41,552 INFO L225 Difference]: With dead ends: 9323 [2021-08-21 13:31:41,552 INFO L226 Difference]: Without dead ends: 9270 [2021-08-21 13:31:41,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1790.8ms TimeCoverageRelationStatistics Valid=279, Invalid=3381, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 13:31:41,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9270 states. [2021-08-21 13:31:41,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9270 to 7116. [2021-08-21 13:31:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7116 states, 7115 states have (on average 3.0359803232607168) internal successors, (21601), 7115 states have internal predecessors, (21601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 21601 transitions. [2021-08-21 13:31:41,697 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 21601 transitions. Word has length 48 [2021-08-21 13:31:41,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:41,697 INFO L470 AbstractCegarLoop]: Abstraction has 7116 states and 21601 transitions. [2021-08-21 13:31:41,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 21601 transitions. [2021-08-21 13:31:41,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:31:41,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:41,707 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:31:41,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 13:31:41,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:41,907 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:31:41,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:41,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1950075915, now seen corresponding path program 23 times [2021-08-21 13:31:41,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:41,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914393702] [2021-08-21 13:31:41,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:41,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:31:42,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:42,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914393702] [2021-08-21 13:31:42,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914393702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:42,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027509702] [2021-08-21 13:31:42,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:31:42,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:42,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:42,977 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:42,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 13:31:50,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:31:50,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:50,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 13:31:50,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:51,192 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 13:31:51,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:31:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:31:52,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027509702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:52,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:52,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:31:52,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655263086] [2021-08-21 13:31:52,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:31:52,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:52,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:31:52,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:31:52,298 INFO L87 Difference]: Start difference. First operand 7116 states and 21601 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:54,023 INFO L93 Difference]: Finished difference Result 9351 states and 28079 transitions. [2021-08-21 13:31:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:31:54,024 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:31:54,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:54,041 INFO L225 Difference]: With dead ends: 9351 [2021-08-21 13:31:54,041 INFO L226 Difference]: Without dead ends: 9316 [2021-08-21 13:31:54,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1834.4ms TimeCoverageRelationStatistics Valid=279, Invalid=3381, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 13:31:54,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2021-08-21 13:31:54,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 7120. [2021-08-21 13:31:54,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.035257760921478) internal successors, (21608), 7119 states have internal predecessors, (21608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:54,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21608 transitions. [2021-08-21 13:31:54,229 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21608 transitions. Word has length 48 [2021-08-21 13:31:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:54,229 INFO L470 AbstractCegarLoop]: Abstraction has 7120 states and 21608 transitions. [2021-08-21 13:31:54,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21608 transitions. [2021-08-21 13:31:54,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:31:54,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:54,239 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:31:54,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 13:31:54,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 13:31:54,441 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:31:54,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:54,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1468708917, now seen corresponding path program 24 times [2021-08-21 13:31:54,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:54,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616553491] [2021-08-21 13:31:54,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:54,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:31:55,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:55,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616553491] [2021-08-21 13:31:55,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616553491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:55,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188007017] [2021-08-21 13:31:55,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:31:55,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:55,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:55,205 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:55,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 13:32:03,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:32:03,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:32:03,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 13:32:03,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:32:03,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 13:32:03,919 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 13:32:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:04,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188007017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:04,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:32:04,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-21 13:32:04,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767921288] [2021-08-21 13:32:04,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 13:32:04,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:32:04,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 13:32:04,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:32:04,741 INFO L87 Difference]: Start difference. First operand 7120 states and 21608 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:06,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:32:06,694 INFO L93 Difference]: Finished difference Result 8079 states and 24472 transitions. [2021-08-21 13:32:06,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:32:06,695 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 13:32:06,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:32:06,709 INFO L225 Difference]: With dead ends: 8079 [2021-08-21 13:32:06,710 INFO L226 Difference]: Without dead ends: 8027 [2021-08-21 13:32:06,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 1984.5ms TimeCoverageRelationStatistics Valid=343, Invalid=3689, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 13:32:06,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8027 states. [2021-08-21 13:32:06,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8027 to 7108. [2021-08-21 13:32:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7108 states, 7107 states have (on average 3.0372871816518927) internal successors, (21586), 7107 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:06,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7108 states to 7108 states and 21586 transitions. [2021-08-21 13:32:06,824 INFO L78 Accepts]: Start accepts. Automaton has 7108 states and 21586 transitions. Word has length 48 [2021-08-21 13:32:06,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:32:06,824 INFO L470 AbstractCegarLoop]: Abstraction has 7108 states and 21586 transitions. [2021-08-21 13:32:06,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:06,824 INFO L276 IsEmpty]: Start isEmpty. Operand 7108 states and 21586 transitions. [2021-08-21 13:32:06,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 13:32:06,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:32:06,835 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:32:06,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-21 13:32:07,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 13:32:07,035 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:32:07,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:32:07,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1340281267, now seen corresponding path program 25 times [2021-08-21 13:32:07,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:32:07,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750910014] [2021-08-21 13:32:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:32:07,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:32:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:32:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:07,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:32:07,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750910014] [2021-08-21 13:32:07,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750910014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:07,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070889590] [2021-08-21 13:32:07,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:32:07,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:07,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:32:07,811 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:32:07,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 13:32:12,398 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 13:32:12,398 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 13:32:13,403 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 13:32:13,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-21 13:32:13,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2021-08-21 13:32:13,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-21 13:32:13,604 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while executing Executor. [2021-08-21 13:32:13,605 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 13:32:13,605 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 13:32:13,605 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 13:32:13,609 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 13:32:13,609 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 13:32:13,610 INFO L202 PluginConnector]: Adding new model queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:32:13 BasicIcfg [2021-08-21 13:32:13,610 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 13:32:13,611 INFO L168 Benchmark]: Toolchain (without parser) took 692098.91 ms. Allocated memory was 202.4 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 182.3 MB in the beginning and 856.0 MB in the end (delta: -673.7 MB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. [2021-08-21 13:32:13,611 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 202.4 MB. Free memory was 183.5 MB in the beginning and 183.4 MB in the end (delta: 85.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:32:13,612 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.94 ms. Allocated memory is still 202.4 MB. Free memory was 182.2 MB in the beginning and 180.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 13:32:13,612 INFO L168 Benchmark]: Boogie Preprocessor took 20.65 ms. Allocated memory is still 202.4 MB. Free memory was 180.7 MB in the beginning and 179.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:32:13,612 INFO L168 Benchmark]: RCFGBuilder took 293.58 ms. Allocated memory is still 202.4 MB. Free memory was 179.5 MB in the beginning and 162.9 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-08-21 13:32:13,612 INFO L168 Benchmark]: TraceAbstraction took 691755.87 ms. Allocated memory was 202.4 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 162.4 MB in the beginning and 856.0 MB in the end (delta: -693.6 MB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. [2021-08-21 13:32:13,613 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 202.4 MB. Free memory was 183.5 MB in the beginning and 183.4 MB in the end (delta: 85.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.94 ms. Allocated memory is still 202.4 MB. Free memory was 182.2 MB in the beginning and 180.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.65 ms. Allocated memory is still 202.4 MB. Free memory was 180.7 MB in the beginning and 179.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 293.58 ms. Allocated memory is still 202.4 MB. Free memory was 179.5 MB in the beginning and 162.9 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 691755.87 ms. Allocated memory was 202.4 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 162.4 MB in the beginning and 856.0 MB in the end (delta: -693.6 MB). Peak memory consumption was 1.8 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 - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 71 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 691618.7ms, OverallIterations: 115, TraceHistogramMax: 2, EmptinessCheckTime: 511.5ms, AutomataDifference: 101843.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 89.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16847 SDtfs, 26506 SDslu, 169253 SDs, 0 SdLazy, 89756 SolverSat, 2810 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 36138.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6801 GetRequests, 2818 SyntacticMatches, 127 SemanticMatches, 3856 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42897 ImplicationChecksByTransitivity, 98347.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7182occurred in iteration=99, InterpolantAutomatonStates: 2733, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5645.1ms AutomataMinimizationTime, 114 MinimizatonAttempts, 102321 StatesRemovedByMinimization, 110 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 628.0ms SsaConstructionTime, 2137.6ms SatisfiabilityAnalysisTime, 133121.9ms InterpolantComputationTime, 8081 NumberOfCodeBlocks, 8081 NumberOfCodeBlocksAsserted, 329 NumberOfCheckSat, 7857 ConstructedInterpolants, 0 QuantifiedInterpolants, 147052 SizeOfPredicates, 1046 NumberOfNonLiveVariables, 10179 ConjunctsInSsa, 2897 ConjunctsInUnsatCore, 224 InterpolantComputations, 5 PerfectInterpolantSequences, 72/1104 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown