/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/inc-subseq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 13:10:01,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 13:10:01,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 13:10:01,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 13:10:01,660 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 13:10:01,688 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 13:10:01,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 13:10:01,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 13:10:01,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 13:10:01,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 13:10:01,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 13:10:01,691 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 13:10:01,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 13:10:01,691 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 13:10:01,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 13:10:01,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 13:10:01,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 13:10:01,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 13:10:01,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 13:10:01,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 13:10:01,692 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 13:10:01,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 13:10:01,693 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 13:10:01,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 13:10:01,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 13:10:01,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 13:10:01,693 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 13:10:01,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 13:10:01,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:10:01,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 13:10:01,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 13:10:01,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 13:10:01,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 13:10:01,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 13:10:01,694 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 13:10:01,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 13:10:01,694 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 13:10:01,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 13:10:01,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 13:10:01,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 13:10:01,961 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 13:10:01,962 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 13:10:01,963 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl [2021-08-21 13:10:01,963 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl' [2021-08-21 13:10:01,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 13:10:01,993 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 13:10:01,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 13:10:01,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 13:10:01,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 13:10:02,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:01" (1/1) ... [2021-08-21 13:10:02,008 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:01" (1/1) ... [2021-08-21 13:10:02,013 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 13:10:02,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 13:10:02,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 13:10:02,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 13:10:02,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:01" (1/1) ... [2021-08-21 13:10:02,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:01" (1/1) ... [2021-08-21 13:10:02,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:01" (1/1) ... [2021-08-21 13:10:02,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:01" (1/1) ... [2021-08-21 13:10:02,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:01" (1/1) ... [2021-08-21 13:10:02,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:01" (1/1) ... [2021-08-21 13:10:02,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:01" (1/1) ... [2021-08-21 13:10:02,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 13:10:02,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 13:10:02,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 13:10:02,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 13:10:02,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:01" (1/1) ... [2021-08-21 13:10:02,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:10:02,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:02,054 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 13:10:02,097 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 13:10:02,120 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 13:10:02,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 13:10:02,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 13:10:02,120 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 13:10:02,121 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 13:10:02,121 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 13:10:02,121 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 13:10:02,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 13:10:02,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 13:10:02,122 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 13:10:02,337 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 13:10:02,337 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 13:10:02,338 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:10:02 BoogieIcfgContainer [2021-08-21 13:10:02,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 13:10:02,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 13:10:02,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 13:10:02,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 13:10:02,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:01" (1/2) ... [2021-08-21 13:10:02,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4dd113 and model type inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:10:02, skipping insertion in model container [2021-08-21 13:10:02,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:10:02" (2/2) ... [2021-08-21 13:10:02,343 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq.wvr.bpl [2021-08-21 13:10:02,346 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 13:10:02,346 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 13:10:02,346 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 13:10:02,346 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 13:10:02,368 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 13:10:02,408 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 13:10:02,412 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 13:10:02,414 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 13:10:02,424 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-08-21 13:10:02,439 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:02,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:02,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 13:10:02,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:02,446 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:02,447 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:10:02,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:02,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1415635565, now seen corresponding path program 1 times [2021-08-21 13:10:02,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:02,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428470812] [2021-08-21 13:10:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:02,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:02,584 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 13:10:02,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:02,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428470812] [2021-08-21 13:10:02,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428470812] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:10:02,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:10:02,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:10:02,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126144803] [2021-08-21 13:10:02,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:10:02,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:02,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:10:02,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:10:02,606 INFO L87 Difference]: Start difference. First operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:02,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:02,640 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-08-21 13:10:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:10:02,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 13:10:02,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:02,654 INFO L225 Difference]: With dead ends: 104 [2021-08-21 13:10:02,654 INFO L226 Difference]: Without dead ends: 87 [2021-08-21 13:10:02,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:10:02,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-21 13:10:02,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-08-21 13:10:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:02,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-08-21 13:10:02,688 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-08-21 13:10:02,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:02,688 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-08-21 13:10:02,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:02,689 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-08-21 13:10:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 13:10:02,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:02,690 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:02,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 13:10:02,690 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:10:02,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:02,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1368071626, now seen corresponding path program 1 times [2021-08-21 13:10:02,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:02,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129210185] [2021-08-21 13:10:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:02,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:02,758 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 13:10:02,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:02,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129210185] [2021-08-21 13:10:02,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129210185] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:10:02,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:10:02,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:10:02,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113373765] [2021-08-21 13:10:02,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:10:02,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:02,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:10:02,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:10:02,761 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:02,796 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-08-21 13:10:02,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:10:02,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 13:10:02,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:02,798 INFO L225 Difference]: With dead ends: 91 [2021-08-21 13:10:02,798 INFO L226 Difference]: Without dead ends: 83 [2021-08-21 13:10:02,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:10:02,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-21 13:10:02,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-08-21 13:10:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:02,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-08-21 13:10:02,806 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-08-21 13:10:02,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:02,806 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-08-21 13:10:02,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:02,806 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-08-21 13:10:02,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 13:10:02,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:02,807 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:02,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 13:10:02,808 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:10:02,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:02,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1835440604, now seen corresponding path program 1 times [2021-08-21 13:10:02,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:02,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364767943] [2021-08-21 13:10:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:02,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:03,017 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 13:10:03,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:03,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364767943] [2021-08-21 13:10:03,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364767943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:03,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190437754] [2021-08-21 13:10:03,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:03,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:03,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:03,020 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 13:10:03,027 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 13:10:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:03,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 13:10:03,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:03,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 13:10:03,453 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 13:10:03,497 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 13:10:03,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190437754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:03,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:03,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 13:10:03,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079292747] [2021-08-21 13:10:03,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:10:03,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:03,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:10:03,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:10:03,499 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:03,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:03,635 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-08-21 13:10:03,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:10:03,637 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 13:10:03,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:03,641 INFO L225 Difference]: With dead ends: 154 [2021-08-21 13:10:03,641 INFO L226 Difference]: Without dead ends: 137 [2021-08-21 13:10:03,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:10:03,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-21 13:10:03,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-08-21 13:10:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-08-21 13:10:03,658 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-08-21 13:10:03,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:03,659 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-08-21 13:10:03,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:03,659 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-08-21 13:10:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:10:03,660 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:03,660 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:03,680 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 13:10:03,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:03,861 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:10:03,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:03,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2029618617, now seen corresponding path program 2 times [2021-08-21 13:10:03,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:03,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632745003] [2021-08-21 13:10:03,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:03,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:03,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:03,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632745003] [2021-08-21 13:10:03,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632745003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:03,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134226090] [2021-08-21 13:10:03,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:10:03,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:03,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:03,947 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 13:10:03,947 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 13:10:04,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:10:04,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:10:04,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 13:10:04,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:04,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134226090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:04,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:04,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-08-21 13:10:04,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120445789] [2021-08-21 13:10:04,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:10:04,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:04,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:10:04,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:10:04,185 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 13:10:04,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:04,283 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-08-21 13:10:04,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:10:04,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 27 [2021-08-21 13:10:04,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:04,284 INFO L225 Difference]: With dead ends: 284 [2021-08-21 13:10:04,285 INFO L226 Difference]: Without dead ends: 264 [2021-08-21 13:10:04,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:10:04,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-08-21 13:10:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-08-21 13:10:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:04,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-08-21 13:10:04,307 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-08-21 13:10:04,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:04,307 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-08-21 13:10:04,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 13:10:04,307 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-08-21 13:10:04,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 13:10:04,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:04,313 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:04,333 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 13:10:04,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-21 13:10:04,529 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:10:04,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:04,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1131642343, now seen corresponding path program 3 times [2021-08-21 13:10:04,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:04,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509910996] [2021-08-21 13:10:04,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:04,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:05,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:05,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509910996] [2021-08-21 13:10:05,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509910996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:05,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962038612] [2021-08-21 13:10:05,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:10:05,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:05,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:05,056 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 13:10:05,056 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 13:10:05,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:10:05,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:10:05,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:10:05,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:05,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:10:05,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2021-08-21 13:10:05,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:10:05,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 46 [2021-08-21 13:10:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:06,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962038612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:06,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:06,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-08-21 13:10:06,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641986984] [2021-08-21 13:10:06,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 13:10:06,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:06,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 13:10:06,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:10:06,202 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:08,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:08,663 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-08-21 13:10:08,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 13:10:08,663 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 13:10:08,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:08,666 INFO L225 Difference]: With dead ends: 650 [2021-08-21 13:10:08,666 INFO L226 Difference]: Without dead ends: 573 [2021-08-21 13:10:08,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1934.5ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:10:08,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-08-21 13:10:08,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-08-21 13:10:08,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.1818181818181817) internal successors, (840), 385 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:08,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-08-21 13:10:08,679 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-08-21 13:10:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:08,680 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-08-21 13:10:08,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-08-21 13:10:08,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 13:10:08,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:08,681 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:08,697 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 13:10:08,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:08,889 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:10:08,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:08,889 INFO L82 PathProgramCache]: Analyzing trace with hash 307390119, now seen corresponding path program 4 times [2021-08-21 13:10:08,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:08,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946838993] [2021-08-21 13:10:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:08,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:10:09,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:09,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946838993] [2021-08-21 13:10:09,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946838993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:09,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206685464] [2021-08-21 13:10:09,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:10:09,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:09,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:09,316 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 13:10:09,317 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 13:10:09,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:10:09,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:10:09,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 13:10:09,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:10,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:10:10,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-08-21 13:10:10,443 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-21 13:10:10,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 23 [2021-08-21 13:10:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:10,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206685464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:10,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:10,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-08-21 13:10:10,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417201782] [2021-08-21 13:10:10,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 13:10:10,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:10,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 13:10:10,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:10:10,480 INFO L87 Difference]: Start difference. First operand 386 states and 840 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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 13:10:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:11,270 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-08-21 13:10:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:10:11,271 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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 32 [2021-08-21 13:10:11,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:11,275 INFO L225 Difference]: With dead ends: 1023 [2021-08-21 13:10:11,275 INFO L226 Difference]: Without dead ends: 878 [2021-08-21 13:10:11,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 800.1ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:10:11,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-08-21 13:10:11,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-08-21 13:10:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.1786542923433876) internal successors, (939), 431 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-08-21 13:10:11,291 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-08-21 13:10:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:11,291 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-08-21 13:10:11,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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 13:10:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-08-21 13:10:11,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 13:10:11,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:11,293 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:11,312 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 13:10:11,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:11,497 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:10:11,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:11,497 INFO L82 PathProgramCache]: Analyzing trace with hash -727791177, now seen corresponding path program 5 times [2021-08-21 13:10:11,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:11,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332640374] [2021-08-21 13:10:11,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:11,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:11,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:11,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332640374] [2021-08-21 13:10:11,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332640374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:11,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240527259] [2021-08-21 13:10:11,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:10:11,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:11,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:11,915 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 13:10:11,917 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 13:10:12,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:10:12,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:10:12,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 13:10:12,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:12,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:10:12,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-08-21 13:10:13,097 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 13:10:13,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 19 [2021-08-21 13:10:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:13,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240527259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:13,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:13,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-08-21 13:10:13,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987093671] [2021-08-21 13:10:13,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 13:10:13,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:13,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 13:10:13,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:10:13,137 INFO L87 Difference]: Start difference. First operand 432 states and 939 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 13:10:14,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:14,189 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-08-21 13:10:14,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:10:14,189 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 32 [2021-08-21 13:10:14,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:14,194 INFO L225 Difference]: With dead ends: 1081 [2021-08-21 13:10:14,194 INFO L226 Difference]: Without dead ends: 927 [2021-08-21 13:10:14,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 853.4ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:10:14,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-08-21 13:10:14,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-08-21 13:10:14,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.1848552338530065) internal successors, (981), 449 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:14,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-08-21 13:10:14,208 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-08-21 13:10:14,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:14,208 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-08-21 13:10:14,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 13:10:14,209 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-08-21 13:10:14,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 13:10:14,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:14,210 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:14,227 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 13:10:14,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:14,425 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:10:14,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:14,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1140541965, now seen corresponding path program 6 times [2021-08-21 13:10:14,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:14,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294375968] [2021-08-21 13:10:14,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:14,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:10:14,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:14,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294375968] [2021-08-21 13:10:14,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294375968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:14,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244898414] [2021-08-21 13:10:14,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:10:14,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:14,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:14,820 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 13:10:14,821 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 13:10:15,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:10:15,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:10:15,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:10:15,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:15,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:10:15,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-08-21 13:10:16,065 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 13:10:16,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-08-21 13:10:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:16,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244898414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:16,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:16,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-08-21 13:10:16,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667095925] [2021-08-21 13:10:16,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 13:10:16,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:16,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 13:10:16,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:10:16,100 INFO L87 Difference]: Start difference. First operand 450 states and 981 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:17,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:17,343 INFO L93 Difference]: Finished difference Result 1050 states and 2217 transitions. [2021-08-21 13:10:17,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:10:17,344 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 13:10:17,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:17,347 INFO L225 Difference]: With dead ends: 1050 [2021-08-21 13:10:17,347 INFO L226 Difference]: Without dead ends: 939 [2021-08-21 13:10:17,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1054.6ms TimeCoverageRelationStatistics Valid=378, Invalid=1974, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:10:17,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-08-21 13:10:17,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 482. [2021-08-21 13:10:17,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.176715176715177) internal successors, (1047), 481 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1047 transitions. [2021-08-21 13:10:17,361 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1047 transitions. Word has length 32 [2021-08-21 13:10:17,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:17,363 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1047 transitions. [2021-08-21 13:10:17,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:17,363 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1047 transitions. [2021-08-21 13:10:17,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 13:10:17,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:17,365 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:17,388 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 13:10:17,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:17,589 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:10:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:17,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1077914535, now seen corresponding path program 7 times [2021-08-21 13:10:17,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:17,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134997847] [2021-08-21 13:10:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:17,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:17,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:17,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134997847] [2021-08-21 13:10:17,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134997847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:17,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342067048] [2021-08-21 13:10:17,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:10:17,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:17,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:17,983 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 13:10:17,984 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 13:10:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:18,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 13:10:18,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:18,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:10:18,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-08-21 13:10:19,271 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-21 13:10:19,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 23 [2021-08-21 13:10:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:19,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342067048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:19,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:19,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-08-21 13:10:19,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625129296] [2021-08-21 13:10:19,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 13:10:19,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:19,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 13:10:19,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:10:19,307 INFO L87 Difference]: Start difference. First operand 482 states and 1047 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 13:10:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:20,046 INFO L93 Difference]: Finished difference Result 1045 states and 2215 transitions. [2021-08-21 13:10:20,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:10:20,046 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 32 [2021-08-21 13:10:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:20,049 INFO L225 Difference]: With dead ends: 1045 [2021-08-21 13:10:20,049 INFO L226 Difference]: Without dead ends: 947 [2021-08-21 13:10:20,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 675.3ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:10:20,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-08-21 13:10:20,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 464. [2021-08-21 13:10:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.1576673866090714) internal successors, (999), 463 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 999 transitions. [2021-08-21 13:10:20,059 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 999 transitions. Word has length 32 [2021-08-21 13:10:20,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:20,060 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 999 transitions. [2021-08-21 13:10:20,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 13:10:20,060 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 999 transitions. [2021-08-21 13:10:20,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 13:10:20,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:20,061 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:20,077 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 13:10:20,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:20,277 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:10:20,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash -158372796, now seen corresponding path program 8 times [2021-08-21 13:10:20,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:20,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028946393] [2021-08-21 13:10:20,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:20,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:20,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:20,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028946393] [2021-08-21 13:10:20,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028946393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:20,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768696994] [2021-08-21 13:10:20,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:10:20,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:20,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:20,397 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 13:10:20,424 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 13:10:20,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:10:20,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:10:20,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 13:10:20,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:21,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768696994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:21,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:21,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-08-21 13:10:21,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521869311] [2021-08-21 13:10:21,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:10:21,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:21,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:10:21,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:10:21,072 INFO L87 Difference]: Start difference. First operand 464 states and 999 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:21,178 INFO L93 Difference]: Finished difference Result 882 states and 1900 transitions. [2021-08-21 13:10:21,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 13:10:21,179 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 13:10:21,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:21,181 INFO L225 Difference]: With dead ends: 882 [2021-08-21 13:10:21,182 INFO L226 Difference]: Without dead ends: 844 [2021-08-21 13:10:21,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:10:21,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-08-21 13:10:21,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 713. [2021-08-21 13:10:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 2.182584269662921) internal successors, (1554), 712 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:21,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1554 transitions. [2021-08-21 13:10:21,193 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1554 transitions. Word has length 36 [2021-08-21 13:10:21,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:21,193 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1554 transitions. [2021-08-21 13:10:21,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:21,193 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1554 transitions. [2021-08-21 13:10:21,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 13:10:21,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:21,194 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:21,217 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 13:10:21,415 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,SelfDestructingSolverStorable9 [2021-08-21 13:10:21,416 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:10:21,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:21,416 INFO L82 PathProgramCache]: Analyzing trace with hash -285292586, now seen corresponding path program 9 times [2021-08-21 13:10:21,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:21,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158976329] [2021-08-21 13:10:21,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:21,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:22,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:22,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158976329] [2021-08-21 13:10:22,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158976329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:22,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987085766] [2021-08-21 13:10:22,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:10:22,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:22,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:22,124 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 13:10:22,125 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 13:10:22,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:10:22,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:10:22,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 13:10:22,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:23,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:10:23,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2021-08-21 13:10:24,425 INFO L354 Elim1Store]: treesize reduction 73, result has 30.5 percent of original size [2021-08-21 13:10:24,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 62 [2021-08-21 13:10:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:24,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987085766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:24,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:24,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-08-21 13:10:24,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314583076] [2021-08-21 13:10:24,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 13:10:24,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:24,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 13:10:24,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:10:24,865 INFO L87 Difference]: Start difference. First operand 713 states and 1554 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:31,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:31,310 INFO L93 Difference]: Finished difference Result 2855 states and 6121 transitions. [2021-08-21 13:10:31,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-08-21 13:10:31,310 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 13:10:31,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:31,317 INFO L225 Difference]: With dead ends: 2855 [2021-08-21 13:10:31,317 INFO L226 Difference]: Without dead ends: 2543 [2021-08-21 13:10:31,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4053 ImplicationChecksByTransitivity, 4881.4ms TimeCoverageRelationStatistics Valid=1710, Invalid=10946, Unknown=0, NotChecked=0, Total=12656 [2021-08-21 13:10:31,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2021-08-21 13:10:31,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 737. [2021-08-21 13:10:31,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.1480978260869565) internal successors, (1581), 736 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1581 transitions. [2021-08-21 13:10:31,337 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1581 transitions. Word has length 41 [2021-08-21 13:10:31,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:31,337 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 1581 transitions. [2021-08-21 13:10:31,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:31,338 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1581 transitions. [2021-08-21 13:10:31,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 13:10:31,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:31,339 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:31,360 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 13:10:31,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:31,553 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:10:31,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:31,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1113966250, now seen corresponding path program 10 times [2021-08-21 13:10:31,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:31,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937194304] [2021-08-21 13:10:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:31,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:10:32,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:32,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937194304] [2021-08-21 13:10:32,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937194304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:32,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51960498] [2021-08-21 13:10:32,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:10:32,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:32,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:32,238 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 13:10:32,241 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 13:10:32,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:10:32,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:10:32,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 13:10:32,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:34,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:10:34,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 62 [2021-08-21 13:10:34,888 INFO L354 Elim1Store]: treesize reduction 106, result has 6.2 percent of original size [2021-08-21 13:10:34,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 29 [2021-08-21 13:10:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:34,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51960498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:34,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:34,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-08-21 13:10:34,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874525288] [2021-08-21 13:10:34,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 13:10:34,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:34,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 13:10:34,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:10:34,923 INFO L87 Difference]: Start difference. First operand 737 states and 1581 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:38,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:38,003 INFO L93 Difference]: Finished difference Result 2302 states and 4879 transitions. [2021-08-21 13:10:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 13:10:38,004 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 13:10:38,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:38,009 INFO L225 Difference]: With dead ends: 2302 [2021-08-21 13:10:38,010 INFO L226 Difference]: Without dead ends: 2145 [2021-08-21 13:10:38,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 2087.1ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 13:10:38,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-08-21 13:10:38,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 854. [2021-08-21 13:10:38,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.138335287221571) internal successors, (1824), 853 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1824 transitions. [2021-08-21 13:10:38,028 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1824 transitions. Word has length 41 [2021-08-21 13:10:38,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:38,028 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 1824 transitions. [2021-08-21 13:10:38,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:38,028 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1824 transitions. [2021-08-21 13:10:38,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 13:10:38,030 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:38,030 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:38,047 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 13:10:38,241 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,SelfDestructingSolverStorable11 [2021-08-21 13:10:38,241 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:10:38,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:38,241 INFO L82 PathProgramCache]: Analyzing trace with hash 142181064, now seen corresponding path program 11 times [2021-08-21 13:10:38,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:38,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155242239] [2021-08-21 13:10:38,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:38,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:38,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:38,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155242239] [2021-08-21 13:10:38,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155242239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:38,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742683254] [2021-08-21 13:10:38,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:10:38,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:38,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:38,949 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 13:10:38,950 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 13:10:39,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:10:39,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:10:39,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:10:39,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:41,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:10:41,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 56 [2021-08-21 13:10:41,695 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 13:10:41,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 39 treesize of output 25 [2021-08-21 13:10:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:41,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742683254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:41,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:41,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-08-21 13:10:41,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451379869] [2021-08-21 13:10:41,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 13:10:41,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:41,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 13:10:41,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 13:10:41,731 INFO L87 Difference]: Start difference. First operand 854 states and 1824 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:45,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:45,023 INFO L93 Difference]: Finished difference Result 2586 states and 5448 transitions. [2021-08-21 13:10:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 13:10:45,024 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 13:10:45,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:45,030 INFO L225 Difference]: With dead ends: 2586 [2021-08-21 13:10:45,030 INFO L226 Difference]: Without dead ends: 2295 [2021-08-21 13:10:45,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 2547.2ms TimeCoverageRelationStatistics Valid=836, Invalid=5326, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 13:10:45,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-08-21 13:10:45,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 746. [2021-08-21 13:10:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.153020134228188) internal successors, (1604), 745 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1604 transitions. [2021-08-21 13:10:45,047 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1604 transitions. Word has length 41 [2021-08-21 13:10:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:45,047 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1604 transitions. [2021-08-21 13:10:45,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:45,048 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1604 transitions. [2021-08-21 13:10:45,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 13:10:45,049 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:45,049 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:45,068 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 13:10:45,260 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,SelfDestructingSolverStorable12 [2021-08-21 13:10:45,261 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:10:45,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:45,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1855988446, now seen corresponding path program 12 times [2021-08-21 13:10:45,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:45,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50676625] [2021-08-21 13:10:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:45,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:45,966 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:10:45,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:45,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50676625] [2021-08-21 13:10:45,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50676625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:45,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045143664] [2021-08-21 13:10:45,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:10:45,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:10:45,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:45,967 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 13:10:45,968 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 13:10:46,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:10:46,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:10:46,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 13:10:46,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:10:48,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:10:48,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 61 [2021-08-21 13:10:49,476 INFO L354 Elim1Store]: treesize reduction 47, result has 51.5 percent of original size [2021-08-21 13:10:49,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 43 treesize of output 76 [2021-08-21 13:10:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:49,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045143664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:10:49,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:10:49,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-08-21 13:10:49,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350801860] [2021-08-21 13:10:49,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 13:10:49,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:49,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 13:10:49,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 13:10:49,884 INFO L87 Difference]: Start difference. First operand 746 states and 1604 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:34,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:34,482 INFO L93 Difference]: Finished difference Result 3393 states and 7212 transitions. [2021-08-21 13:11:34,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-08-21 13:11:34,483 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 13:11:34,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:34,491 INFO L225 Difference]: With dead ends: 3393 [2021-08-21 13:11:34,491 INFO L226 Difference]: Without dead ends: 3071 [2021-08-21 13:11:34,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5652 ImplicationChecksByTransitivity, 29116.6ms TimeCoverageRelationStatistics Valid=2687, Invalid=14342, Unknown=1, NotChecked=0, Total=17030 [2021-08-21 13:11:34,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-08-21 13:11:34,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 882. [2021-08-21 13:11:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.155505107832009) internal successors, (1899), 881 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1899 transitions. [2021-08-21 13:11:34,511 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1899 transitions. Word has length 41 [2021-08-21 13:11:34,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:34,512 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 1899 transitions. [2021-08-21 13:11:34,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1899 transitions. [2021-08-21 13:11:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 13:11:34,513 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:34,513 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:34,533 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 13:11:34,728 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,SelfDestructingSolverStorable13 [2021-08-21 13:11:34,729 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:11:34,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:34,729 INFO L82 PathProgramCache]: Analyzing trace with hash -883434580, now seen corresponding path program 13 times [2021-08-21 13:11:34,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:34,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804722352] [2021-08-21 13:11:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:34,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:11:35,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:35,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804722352] [2021-08-21 13:11:35,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804722352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:35,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128753590] [2021-08-21 13:11:35,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:11:35,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:35,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:35,420 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 13:11:35,420 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 13:11:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:36,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 13:11:36,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:38,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:11:38,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 62 [2021-08-21 13:11:38,540 INFO L354 Elim1Store]: treesize reduction 106, result has 6.2 percent of original size [2021-08-21 13:11:38,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 29 [2021-08-21 13:11:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:38,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128753590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:38,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:38,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-08-21 13:11:38,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973264120] [2021-08-21 13:11:38,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 13:11:38,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:38,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 13:11:38,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:11:38,576 INFO L87 Difference]: Start difference. First operand 882 states and 1899 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:41,597 INFO L93 Difference]: Finished difference Result 3308 states and 7100 transitions. [2021-08-21 13:11:41,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 13:11:41,598 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 13:11:41,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:41,606 INFO L225 Difference]: With dead ends: 3308 [2021-08-21 13:11:41,606 INFO L226 Difference]: Without dead ends: 3100 [2021-08-21 13:11:41,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 2023.5ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 13:11:41,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-08-21 13:11:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1074. [2021-08-21 13:11:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 2.1491146318732524) internal successors, (2306), 1073 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 2306 transitions. [2021-08-21 13:11:41,630 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 2306 transitions. Word has length 41 [2021-08-21 13:11:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:41,630 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 2306 transitions. [2021-08-21 13:11:41,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:41,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 2306 transitions. [2021-08-21 13:11:41,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 13:11:41,632 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:41,632 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:41,658 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 13:11:41,844 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,SelfDestructingSolverStorable14 [2021-08-21 13:11:41,845 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:11:41,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:41,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1918615876, now seen corresponding path program 14 times [2021-08-21 13:11:41,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:41,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414265354] [2021-08-21 13:11:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:41,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:42,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:42,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414265354] [2021-08-21 13:11:42,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414265354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:42,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838452615] [2021-08-21 13:11:42,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:11:42,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:42,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:42,537 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 13:11:42,538 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 13:11:43,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:11:43,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:43,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 13:11:43,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:45,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:11:45,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 62 [2021-08-21 13:11:45,814 INFO L354 Elim1Store]: treesize reduction 106, result has 6.2 percent of original size [2021-08-21 13:11:45,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 29 [2021-08-21 13:11:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:45,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838452615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:45,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:45,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-08-21 13:11:45,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111203518] [2021-08-21 13:11:45,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 13:11:45,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:45,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 13:11:45,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 13:11:45,851 INFO L87 Difference]: Start difference. First operand 1074 states and 2306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:48,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:48,815 INFO L93 Difference]: Finished difference Result 3729 states and 7998 transitions. [2021-08-21 13:11:48,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 13:11:48,816 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 13:11:48,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:48,825 INFO L225 Difference]: With dead ends: 3729 [2021-08-21 13:11:48,825 INFO L226 Difference]: Without dead ends: 3485 [2021-08-21 13:11:48,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 2310.4ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 13:11:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2021-08-21 13:11:48,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 1340. [2021-08-21 13:11:48,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 2.1598207617625094) internal successors, (2892), 1339 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2892 transitions. [2021-08-21 13:11:48,859 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2892 transitions. Word has length 41 [2021-08-21 13:11:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:48,859 INFO L470 AbstractCegarLoop]: Abstraction has 1340 states and 2892 transitions. [2021-08-21 13:11:48,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:48,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2892 transitions. [2021-08-21 13:11:48,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 13:11:48,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:48,861 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:48,881 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 13:11:49,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:49,077 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:11:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:49,077 INFO L82 PathProgramCache]: Analyzing trace with hash 260532846, now seen corresponding path program 15 times [2021-08-21 13:11:49,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:49,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876866050] [2021-08-21 13:11:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:49,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:49,738 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:49,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:49,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876866050] [2021-08-21 13:11:49,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876866050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:49,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425228247] [2021-08-21 13:11:49,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:11:49,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:49,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:49,741 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 13:11:49,741 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 13:11:51,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:11:51,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:51,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 13:11:51,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:52,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:11:52,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-08-21 13:11:52,716 INFO L354 Elim1Store]: treesize reduction 62, result has 45.1 percent of original size [2021-08-21 13:11:52,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 76 [2021-08-21 13:11:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:53,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425228247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:53,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:53,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-21 13:11:53,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825256274] [2021-08-21 13:11:53,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 13:11:53,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:53,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 13:11:53,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:11:53,346 INFO L87 Difference]: Start difference. First operand 1340 states and 2892 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:56,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:56,934 INFO L93 Difference]: Finished difference Result 3964 states and 8537 transitions. [2021-08-21 13:11:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 13:11:56,937 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 13:11:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:56,944 INFO L225 Difference]: With dead ends: 3964 [2021-08-21 13:11:56,944 INFO L226 Difference]: Without dead ends: 3800 [2021-08-21 13:11:56,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 3201.0ms TimeCoverageRelationStatistics Valid=738, Invalid=5114, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 13:11:56,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3800 states. [2021-08-21 13:11:56,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3800 to 1483. [2021-08-21 13:11:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.163292847503374) internal successors, (3206), 1482 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3206 transitions. [2021-08-21 13:11:56,972 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3206 transitions. Word has length 41 [2021-08-21 13:11:56,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:56,972 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 3206 transitions. [2021-08-21 13:11:56,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:56,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3206 transitions. [2021-08-21 13:11:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 13:11:56,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:56,974 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:56,995 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 13:11:57,188 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,SelfDestructingSolverStorable16 [2021-08-21 13:11:57,189 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:11:57,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:57,189 INFO L82 PathProgramCache]: Analyzing trace with hash -160029005, now seen corresponding path program 16 times [2021-08-21 13:11:57,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:57,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055854713] [2021-08-21 13:11:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:57,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:57,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:57,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055854713] [2021-08-21 13:11:57,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055854713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:57,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028494190] [2021-08-21 13:11:57,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:11:57,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:57,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:57,299 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 13:11:57,300 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 13:11:58,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:11:58,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:58,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:11:58,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:59,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028494190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:59,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:59,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-08-21 13:11:59,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698045927] [2021-08-21 13:11:59,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:11:59,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:59,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:11:59,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:11:59,094 INFO L87 Difference]: Start difference. First operand 1483 states and 3206 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:59,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:59,209 INFO L93 Difference]: Finished difference Result 2019 states and 4365 transitions. [2021-08-21 13:11:59,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:11:59,209 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-21 13:11:59,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:59,213 INFO L225 Difference]: With dead ends: 2019 [2021-08-21 13:11:59,213 INFO L226 Difference]: Without dead ends: 1969 [2021-08-21 13:11:59,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:11:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2021-08-21 13:11:59,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1621. [2021-08-21 13:11:59,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.175925925925926) internal successors, (3525), 1620 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 3525 transitions. [2021-08-21 13:11:59,232 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 3525 transitions. Word has length 45 [2021-08-21 13:11:59,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:59,232 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 3525 transitions. [2021-08-21 13:11:59,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 3525 transitions. [2021-08-21 13:11:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 13:11:59,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:59,235 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:59,257 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 13:11:59,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 13:11:59,449 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:11:59,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:59,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1089314110, now seen corresponding path program 17 times [2021-08-21 13:11:59,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:59,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983951258] [2021-08-21 13:11:59,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:59,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-21 13:11:59,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:59,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983951258] [2021-08-21 13:11:59,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983951258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:59,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712350170] [2021-08-21 13:11:59,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:11:59,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:59,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:59,501 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 13:11:59,522 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 13:12:01,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:12:01,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:01,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:12:01,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-21 13:12:01,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712350170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:01,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:01,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 13:12:01,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405627350] [2021-08-21 13:12:01,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 13:12:01,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:01,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 13:12:01,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:12:01,317 INFO L87 Difference]: Start difference. First operand 1621 states and 3525 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:01,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:01,347 INFO L93 Difference]: Finished difference Result 2104 states and 4548 transitions. [2021-08-21 13:12:01,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 13:12:01,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 13:12:01,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:01,351 INFO L225 Difference]: With dead ends: 2104 [2021-08-21 13:12:01,351 INFO L226 Difference]: Without dead ends: 2104 [2021-08-21 13:12:01,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:12:01,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-08-21 13:12:01,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1445. [2021-08-21 13:12:01,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 2.1717451523545708) internal successors, (3136), 1444 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:01,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 3136 transitions. [2021-08-21 13:12:01,368 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 3136 transitions. Word has length 46 [2021-08-21 13:12:01,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:01,368 INFO L470 AbstractCegarLoop]: Abstraction has 1445 states and 3136 transitions. [2021-08-21 13:12:01,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:01,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 3136 transitions. [2021-08-21 13:12:01,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 13:12:01,372 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:01,373 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:12:01,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 13:12:01,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:01,584 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:12:01,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:01,584 INFO L82 PathProgramCache]: Analyzing trace with hash -465076220, now seen corresponding path program 18 times [2021-08-21 13:12:01,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:01,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944424027] [2021-08-21 13:12:01,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:01,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 13:12:01,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:01,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944424027] [2021-08-21 13:12:01,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944424027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:01,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094112279] [2021-08-21 13:12:01,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:12:01,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:01,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:01,640 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 13:12:01,641 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 13:12:03,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 13:12:03,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:03,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:12:03,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 13:12:03,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094112279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:03,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:03,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 13:12:03,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166210284] [2021-08-21 13:12:03,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:12:03,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:03,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:12:03,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:12:03,492 INFO L87 Difference]: Start difference. First operand 1445 states and 3136 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 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 13:12:03,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:03,534 INFO L93 Difference]: Finished difference Result 1604 states and 3442 transitions. [2021-08-21 13:12:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:12:03,535 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 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 46 [2021-08-21 13:12:03,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:03,537 INFO L225 Difference]: With dead ends: 1604 [2021-08-21 13:12:03,538 INFO L226 Difference]: Without dead ends: 1604 [2021-08-21 13:12:03,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:12:03,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-08-21 13:12:03,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1207. [2021-08-21 13:12:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 2.1550580431177444) internal successors, (2599), 1206 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2599 transitions. [2021-08-21 13:12:03,564 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2599 transitions. Word has length 46 [2021-08-21 13:12:03,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:03,564 INFO L470 AbstractCegarLoop]: Abstraction has 1207 states and 2599 transitions. [2021-08-21 13:12:03,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 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 13:12:03,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2599 transitions. [2021-08-21 13:12:03,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 13:12:03,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:03,566 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:12:03,587 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 13:12:03,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:03,781 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:12:03,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:03,781 INFO L82 PathProgramCache]: Analyzing trace with hash 2013245281, now seen corresponding path program 19 times [2021-08-21 13:12:03,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:03,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256154481] [2021-08-21 13:12:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:03,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:04,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:04,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256154481] [2021-08-21 13:12:04,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256154481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:04,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832757086] [2021-08-21 13:12:04,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:12:04,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:04,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:04,926 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 13:12:04,928 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 13:12:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:06,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 13:12:06,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:08,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:12:08,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 97 [2021-08-21 13:12:09,170 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 13:12:09,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 16 [2021-08-21 13:12:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:09,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832757086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:09,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:09,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-08-21 13:12:09,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495080600] [2021-08-21 13:12:09,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-21 13:12:09,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:09,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-21 13:12:09,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:12:09,204 INFO L87 Difference]: Start difference. First operand 1207 states and 2599 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:13,515 INFO L93 Difference]: Finished difference Result 2755 states and 5872 transitions. [2021-08-21 13:12:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 13:12:13,516 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-21 13:12:13,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:13,520 INFO L225 Difference]: With dead ends: 2755 [2021-08-21 13:12:13,520 INFO L226 Difference]: Without dead ends: 2659 [2021-08-21 13:12:13,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 3548.6ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-08-21 13:12:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-08-21 13:12:13,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 1299. [2021-08-21 13:12:13,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.1656394453004624) internal successors, (2811), 1298 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:13,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 2811 transitions. [2021-08-21 13:12:13,539 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 2811 transitions. Word has length 50 [2021-08-21 13:12:13,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:13,539 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 2811 transitions. [2021-08-21 13:12:13,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:13,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 2811 transitions. [2021-08-21 13:12:13,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 13:12:13,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:13,541 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:12:13,564 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 13:12:13,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:13,757 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:12:13,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:13,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1889187423, now seen corresponding path program 20 times [2021-08-21 13:12:13,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:13,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222068503] [2021-08-21 13:12:13,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:13,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:12:14,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:14,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222068503] [2021-08-21 13:12:14,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222068503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:14,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992595257] [2021-08-21 13:12:14,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:12:14,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:14,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:14,850 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 13:12:14,851 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 13:12:16,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:12:16,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:16,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 13:12:16,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:19,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:12:19,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 96 [2021-08-21 13:12:20,224 INFO L354 Elim1Store]: treesize reduction 164, result has 4.1 percent of original size [2021-08-21 13:12:20,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 32 [2021-08-21 13:12:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:20,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992595257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:20,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:20,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-08-21 13:12:20,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154464629] [2021-08-21 13:12:20,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 13:12:20,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:20,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 13:12:20,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:12:20,259 INFO L87 Difference]: Start difference. First operand 1299 states and 2811 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:27,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:27,214 INFO L93 Difference]: Finished difference Result 3297 states and 7007 transitions. [2021-08-21 13:12:27,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-21 13:12:27,215 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-21 13:12:27,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:27,219 INFO L225 Difference]: With dead ends: 3297 [2021-08-21 13:12:27,219 INFO L226 Difference]: Without dead ends: 3184 [2021-08-21 13:12:27,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5162.0ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-08-21 13:12:27,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-08-21 13:12:27,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 1653. [2021-08-21 13:12:27,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.151331719128329) internal successors, (3554), 1652 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 3554 transitions. [2021-08-21 13:12:27,244 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 3554 transitions. Word has length 50 [2021-08-21 13:12:27,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:27,244 INFO L470 AbstractCegarLoop]: Abstraction has 1653 states and 3554 transitions. [2021-08-21 13:12:27,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:27,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 3554 transitions. [2021-08-21 13:12:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 13:12:27,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:27,254 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:12:27,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 13:12:27,468 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,SelfDestructingSolverStorable21 [2021-08-21 13:12:27,469 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:12:27,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:27,469 INFO L82 PathProgramCache]: Analyzing trace with hash -633040109, now seen corresponding path program 21 times [2021-08-21 13:12:27,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:27,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036108815] [2021-08-21 13:12:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:27,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:28,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:28,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036108815] [2021-08-21 13:12:28,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036108815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:28,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85610424] [2021-08-21 13:12:28,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:12:28,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:28,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:28,588 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 13:12:28,589 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 13:12:30,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 13:12:30,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:30,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 13:12:30,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:35,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:12:35,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 113 [2021-08-21 13:12:41,941 INFO L354 Elim1Store]: treesize reduction 81, result has 58.0 percent of original size [2021-08-21 13:12:41,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 71 treesize of output 156 [2021-08-21 13:12:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:45,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85610424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:45,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:45,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-08-21 13:12:45,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451023768] [2021-08-21 13:12:45,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-21 13:12:45,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:45,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-21 13:12:45,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2270, Unknown=1, NotChecked=0, Total=2550 [2021-08-21 13:12:45,611 INFO L87 Difference]: Start difference. First operand 1653 states and 3554 transitions. Second operand has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:33,633 WARN L224 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-08-21 13:18:33,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-08-21 13:18:33,645 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 101 [2021-08-21 13:18:33,655 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 13:18:33,834 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,SelfDestructingSolverStorable22 [2021-08-21 13:18:33,835 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:235) ... 49 more [2021-08-21 13:18:33,838 INFO L168 Benchmark]: Toolchain (without parser) took 511845.25 ms. Allocated memory was 195.0 MB in the beginning and 285.2 MB in the end (delta: 90.2 MB). Free memory was 174.6 MB in the beginning and 140.6 MB in the end (delta: 34.1 MB). Peak memory consumption was 124.3 MB. Max. memory is 8.0 GB. [2021-08-21 13:18:33,838 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 195.0 MB. Free memory was 175.8 MB in the beginning and 175.8 MB in the end (delta: 79.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:18:33,838 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.61 ms. Allocated memory is still 195.0 MB. Free memory was 174.5 MB in the beginning and 173.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:18:33,838 INFO L168 Benchmark]: Boogie Preprocessor took 13.92 ms. Allocated memory is still 195.0 MB. Free memory was 173.1 MB in the beginning and 172.2 MB in the end (delta: 926.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:18:33,839 INFO L168 Benchmark]: RCFGBuilder took 309.25 ms. Allocated memory is still 195.0 MB. Free memory was 172.1 MB in the beginning and 159.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-21 13:18:33,839 INFO L168 Benchmark]: TraceAbstraction took 511497.82 ms. Allocated memory was 195.0 MB in the beginning and 285.2 MB in the end (delta: 90.2 MB). Free memory was 158.6 MB in the beginning and 140.6 MB in the end (delta: 18.1 MB). Peak memory consumption was 108.6 MB. Max. memory is 8.0 GB. [2021-08-21 13:18:33,840 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 0.09 ms. Allocated memory is still 195.0 MB. Free memory was 175.8 MB in the beginning and 175.8 MB in the end (delta: 79.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.61 ms. Allocated memory is still 195.0 MB. Free memory was 174.5 MB in the beginning and 173.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.92 ms. Allocated memory is still 195.0 MB. Free memory was 173.1 MB in the beginning and 172.2 MB in the end (delta: 926.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 309.25 ms. Allocated memory is still 195.0 MB. Free memory was 172.1 MB in the beginning and 159.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 511497.82 ms. Allocated memory was 195.0 MB in the beginning and 285.2 MB in the end (delta: 90.2 MB). Free memory was 158.6 MB in the beginning and 140.6 MB in the end (delta: 18.1 MB). Peak memory consumption was 108.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...