/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/nonblocking-cntr.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 14:57:53,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 14:57:53,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 14:57:53,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 14:57:53,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 14:57:53,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 14:57:53,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 14:57:53,833 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 [2021-08-06 14:57:53,872 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 14:57:53,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 14:57:53,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 14:57:53,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 14:57:53,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 14:57:53,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 14:57:53,876 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 14:57:53,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 14:57:53,877 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 14:57:53,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 14:57:53,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 14:57:53,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 14:57:53,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 14:57:53,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 14:57:53,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 14:57:53,888 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 14:57:53,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 14:57:53,888 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 14:57:53,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 14:57:53,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 14:57:53,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 14:57:53,889 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 14:57:53,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 14:57:53,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:57:53,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 14:57:53,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 14:57:53,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 14:57:53,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 14:57:53,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 14:57:53,890 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 14:57:53,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 14:57:53,890 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 14:57:54,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 14:57:54,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 14:57:54,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 14:57:54,208 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 14:57:54,210 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 14:57:54,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl [2021-08-06 14:57:54,211 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl' [2021-08-06 14:57:54,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 14:57:54,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 14:57:54,247 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 14:57:54,247 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 14:57:54,247 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 14:57:54,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:57:54" (1/1) ... [2021-08-06 14:57:54,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:57:54" (1/1) ... [2021-08-06 14:57:54,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 14:57:54,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 14:57:54,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 14:57:54,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 14:57:54,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:57:54" (1/1) ... [2021-08-06 14:57:54,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:57:54" (1/1) ... [2021-08-06 14:57:54,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:57:54" (1/1) ... [2021-08-06 14:57:54,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:57:54" (1/1) ... [2021-08-06 14:57:54,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:57:54" (1/1) ... [2021-08-06 14:57:54,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:57:54" (1/1) ... [2021-08-06 14:57:54,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:57:54" (1/1) ... [2021-08-06 14:57:54,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 14:57:54,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 14:57:54,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 14:57:54,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 14:57:54,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:57:54" (1/1) ... [2021-08-06 14:57:54,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:57:54,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:57:54,318 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) [2021-08-06 14:57:54,320 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 [2021-08-06 14:57:54,349 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 14:57:54,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 14:57:54,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 14:57:54,349 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 14:57:54,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 14:57:54,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 14:57:54,349 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 14:57:54,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 14:57:54,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 14:57:54,350 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 14:57:54,501 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 14:57:54,501 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 14:57:54,503 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:57:54 BoogieIcfgContainer [2021-08-06 14:57:54,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 14:57:54,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 14:57:54,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 14:57:54,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 14:57:54,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:57:54" (1/2) ... [2021-08-06 14:57:54,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114c2f6 and model type nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 02:57:54, skipping insertion in model container [2021-08-06 14:57:54,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:57:54" (2/2) ... [2021-08-06 14:57:54,510 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr.wvr.bpl [2021-08-06 14:57:54,514 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 14:57:54,514 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 14:57:54,514 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 14:57:54,514 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 14:57:54,539 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 14:57:54,576 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 14:57:54,581 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 [2021-08-06 14:57:54,582 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 14:57:54,590 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-08-06 14:57:54,619 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:54,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:57:54,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:57:54,627 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:57:54,627 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:57:54,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:57:54,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1631855703, now seen corresponding path program 1 times [2021-08-06 14:57:54,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:57:54,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598005061] [2021-08-06 14:57:54,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:54,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:57:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:54,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:57:54,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598005061] [2021-08-06 14:57:54,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598005061] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:57:54,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:57:54,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:57:54,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730448713] [2021-08-06 14:57:54,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:57:54,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:57:54,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:57:54,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:57:54,894 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:54,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:57:54,952 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-08-06 14:57:54,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:57:54,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:57:54,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:57:54,961 INFO L225 Difference]: With dead ends: 43 [2021-08-06 14:57:54,961 INFO L226 Difference]: Without dead ends: 43 [2021-08-06 14:57:54,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:57:54,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-06 14:57:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-08-06 14:57:54,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-08-06 14:57:54,997 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-08-06 14:57:54,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:57:54,997 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-08-06 14:57:54,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:54,998 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-08-06 14:57:54,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:57:54,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:57:54,999 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:57:55,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 14:57:55,000 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:57:55,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:57:55,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1473491929, now seen corresponding path program 1 times [2021-08-06 14:57:55,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:57:55,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992750492] [2021-08-06 14:57:55,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:55,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:57:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:57:55,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:57:55,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992750492] [2021-08-06 14:57:55,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992750492] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:57:55,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:57:55,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:57:55,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011586740] [2021-08-06 14:57:55,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:57:55,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:57:55,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:57:55,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:57:55,118 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:55,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:57:55,161 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-08-06 14:57:55,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:57:55,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:57:55,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:57:55,170 INFO L225 Difference]: With dead ends: 50 [2021-08-06 14:57:55,170 INFO L226 Difference]: Without dead ends: 50 [2021-08-06 14:57:55,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:57:55,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-06 14:57:55,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-08-06 14:57:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:55,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-08-06 14:57:55,188 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-08-06 14:57:55,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:57:55,188 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-08-06 14:57:55,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:55,188 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-08-06 14:57:55,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:57:55,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:57:55,189 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:57:55,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 14:57:55,191 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:57:55,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:57:55,192 INFO L82 PathProgramCache]: Analyzing trace with hash 917506533, now seen corresponding path program 1 times [2021-08-06 14:57:55,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:57:55,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663369633] [2021-08-06 14:57:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:55,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:57:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:55,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:57:55,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663369633] [2021-08-06 14:57:55,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663369633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:55,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904742473] [2021-08-06 14:57:55,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:55,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:55,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:57:55,357 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) [2021-08-06 14:57:55,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 14:57:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:55,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:57:55,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:57:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:55,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904742473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:55,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:57:55,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-06 14:57:55,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569295266] [2021-08-06 14:57:55,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:57:55,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:57:55,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:57:55,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:57:55,784 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:57:55,832 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-08-06 14:57:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:57:55,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:57:55,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:57:55,837 INFO L225 Difference]: With dead ends: 99 [2021-08-06 14:57:55,837 INFO L226 Difference]: Without dead ends: 78 [2021-08-06 14:57:55,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:57:55,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-06 14:57:55,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2021-08-06 14:57:55,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:55,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-08-06 14:57:55,853 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 19 [2021-08-06 14:57:55,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:57:55,853 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-08-06 14:57:55,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:55,854 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-08-06 14:57:55,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:57:55,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:57:55,854 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:57:55,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 14:57:56,076 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 [2021-08-06 14:57:56,076 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:57:56,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:57:56,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1069238711, now seen corresponding path program 2 times [2021-08-06 14:57:56,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:57:56,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94223162] [2021-08-06 14:57:56,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:56,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:57:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:56,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:57:56,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94223162] [2021-08-06 14:57:56,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94223162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:56,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959956579] [2021-08-06 14:57:56,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:57:56,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:56,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:57:56,160 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) [2021-08-06 14:57:56,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 14:57:56,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:57:56,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:57:56,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 14:57:56,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:57:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:56,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959956579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:56,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:57:56,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 14:57:56,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214492496] [2021-08-06 14:57:56,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:57:56,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:57:56,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:57:56,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:57:56,424 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:56,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:57:56,455 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2021-08-06 14:57:56,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:57:56,456 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:57:56,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:57:56,457 INFO L225 Difference]: With dead ends: 80 [2021-08-06 14:57:56,458 INFO L226 Difference]: Without dead ends: 77 [2021-08-06 14:57:56,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:57:56,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-06 14:57:56,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2021-08-06 14:57:56,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:56,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-08-06 14:57:56,468 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 19 [2021-08-06 14:57:56,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:57:56,469 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-08-06 14:57:56,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:56,469 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-08-06 14:57:56,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:57:56,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:57:56,470 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:57:56,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 14:57:56,687 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 [2021-08-06 14:57:56,688 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:57:56,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:57:56,688 INFO L82 PathProgramCache]: Analyzing trace with hash 859525155, now seen corresponding path program 3 times [2021-08-06 14:57:56,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:57:56,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475845601] [2021-08-06 14:57:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:56,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:57:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:56,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:57:56,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475845601] [2021-08-06 14:57:56,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475845601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:56,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543045248] [2021-08-06 14:57:56,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:57:56,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:56,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:57:56,805 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) [2021-08-06 14:57:56,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 14:57:56,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:57:56,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:57:56,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:57:56,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:57:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:57,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543045248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:57,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:57:57,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 14:57:57,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596663683] [2021-08-06 14:57:57,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:57:57,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:57:57,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:57:57,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:57:57,280 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:57,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:57:57,612 INFO L93 Difference]: Finished difference Result 198 states and 365 transitions. [2021-08-06 14:57:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:57:57,613 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 14:57:57,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:57:57,614 INFO L225 Difference]: With dead ends: 198 [2021-08-06 14:57:57,614 INFO L226 Difference]: Without dead ends: 192 [2021-08-06 14:57:57,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 305.8ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:57:57,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-06 14:57:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 90. [2021-08-06 14:57:57,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 181 transitions. [2021-08-06 14:57:57,635 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 181 transitions. Word has length 21 [2021-08-06 14:57:57,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:57:57,635 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 181 transitions. [2021-08-06 14:57:57,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:57,635 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 181 transitions. [2021-08-06 14:57:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:57:57,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:57:57,639 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:57:57,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 14:57:57,856 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 [2021-08-06 14:57:57,857 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:57:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:57:57,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1109337493, now seen corresponding path program 4 times [2021-08-06 14:57:57,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:57:57,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818417041] [2021-08-06 14:57:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:57,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:57:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:57,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:57:57,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818417041] [2021-08-06 14:57:57,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818417041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:57,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079249153] [2021-08-06 14:57:57,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:57:57,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:57,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:57:57,945 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) [2021-08-06 14:57:57,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 14:57:58,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:57:58,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:57:58,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:57:58,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:57:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:58,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079249153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:58,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:57:58,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-08-06 14:57:58,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815747464] [2021-08-06 14:57:58,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:57:58,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:57:58,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:57:58,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:57:58,373 INFO L87 Difference]: Start difference. First operand 90 states and 181 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:57:58,669 INFO L93 Difference]: Finished difference Result 170 states and 325 transitions. [2021-08-06 14:57:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:57:58,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 14:57:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:57:58,671 INFO L225 Difference]: With dead ends: 170 [2021-08-06 14:57:58,671 INFO L226 Difference]: Without dead ends: 166 [2021-08-06 14:57:58,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:57:58,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-08-06 14:57:58,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 92. [2021-08-06 14:57:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:58,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 183 transitions. [2021-08-06 14:57:58,682 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 183 transitions. Word has length 21 [2021-08-06 14:57:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:57:58,682 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 183 transitions. [2021-08-06 14:57:58,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:58,682 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 183 transitions. [2021-08-06 14:57:58,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:57:58,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:57:58,685 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:57:58,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 14:57:58,898 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 [2021-08-06 14:57:58,899 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:57:58,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:57:58,899 INFO L82 PathProgramCache]: Analyzing trace with hash 446728737, now seen corresponding path program 5 times [2021-08-06 14:57:58,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:57:58,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190241164] [2021-08-06 14:57:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:58,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:57:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:58,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:57:58,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190241164] [2021-08-06 14:57:58,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190241164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:58,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202576231] [2021-08-06 14:57:58,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:57:58,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:58,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:57:58,989 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) [2021-08-06 14:57:58,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 14:57:59,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:57:59,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:57:59,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:57:59,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:57:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:59,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202576231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:59,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:57:59,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:57:59,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049556329] [2021-08-06 14:57:59,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:57:59,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:57:59,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:57:59,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:57:59,343 INFO L87 Difference]: Start difference. First operand 92 states and 183 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:57:59,367 INFO L93 Difference]: Finished difference Result 190 states and 376 transitions. [2021-08-06 14:57:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:57:59,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:57:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:57:59,368 INFO L225 Difference]: With dead ends: 190 [2021-08-06 14:57:59,368 INFO L226 Difference]: Without dead ends: 163 [2021-08-06 14:57:59,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:57:59,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-06 14:57:59,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2021-08-06 14:57:59,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-08-06 14:57:59,375 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 23 [2021-08-06 14:57:59,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:57:59,375 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-08-06 14:57:59,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:57:59,375 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-08-06 14:57:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:57:59,376 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:57:59,376 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:57:59,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 14:57:59,591 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 [2021-08-06 14:57:59,592 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:57:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:57:59,592 INFO L82 PathProgramCache]: Analyzing trace with hash -948358029, now seen corresponding path program 6 times [2021-08-06 14:57:59,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:57:59,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541200088] [2021-08-06 14:57:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:57:59,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:57:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:57:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:57:59,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:57:59,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541200088] [2021-08-06 14:57:59,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541200088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:57:59,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523543710] [2021-08-06 14:57:59,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:57:59,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:57:59,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:57:59,754 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) [2021-08-06 14:57:59,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 14:57:59,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:57:59,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:57:59,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:57:59,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:00,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523543710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:00,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:00,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 14:58:00,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771116127] [2021-08-06 14:58:00,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:58:00,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:00,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:58:00,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:58:00,279 INFO L87 Difference]: Start difference. First operand 120 states and 248 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-08-06 14:58:00,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:00,786 INFO L93 Difference]: Finished difference Result 320 states and 619 transitions. [2021-08-06 14:58:00,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:58:00,787 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 23 [2021-08-06 14:58:00,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:00,788 INFO L225 Difference]: With dead ends: 320 [2021-08-06 14:58:00,788 INFO L226 Difference]: Without dead ends: 302 [2021-08-06 14:58:00,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 491.6ms TimeCoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:58:00,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-08-06 14:58:00,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 141. [2021-08-06 14:58:00,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.092857142857143) internal successors, (293), 140 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:00,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 293 transitions. [2021-08-06 14:58:00,794 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 293 transitions. Word has length 23 [2021-08-06 14:58:00,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:00,794 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 293 transitions. [2021-08-06 14:58:00,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-08-06 14:58:00,794 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 293 transitions. [2021-08-06 14:58:00,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:58:00,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:00,795 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:00,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:01,014 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 [2021-08-06 14:58:01,015 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:01,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:01,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1017367007, now seen corresponding path program 7 times [2021-08-06 14:58:01,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:01,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634468627] [2021-08-06 14:58:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:01,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:01,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:01,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634468627] [2021-08-06 14:58:01,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634468627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:01,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655120973] [2021-08-06 14:58:01,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:58:01,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:01,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:01,114 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) [2021-08-06 14:58:01,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 14:58:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:01,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 14:58:01,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:01,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655120973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:01,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:01,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-06 14:58:01,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682794022] [2021-08-06 14:58:01,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:58:01,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:01,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:58:01,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:58:01,613 INFO L87 Difference]: Start difference. First operand 141 states and 293 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:01,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:01,965 INFO L93 Difference]: Finished difference Result 321 states and 651 transitions. [2021-08-06 14:58:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:58:01,965 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:58:01,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:01,967 INFO L225 Difference]: With dead ends: 321 [2021-08-06 14:58:01,967 INFO L226 Difference]: Without dead ends: 317 [2021-08-06 14:58:01,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:58:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-08-06 14:58:01,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 173. [2021-08-06 14:58:01,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.1744186046511627) internal successors, (374), 172 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 374 transitions. [2021-08-06 14:58:01,974 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 374 transitions. Word has length 23 [2021-08-06 14:58:01,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:01,974 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 374 transitions. [2021-08-06 14:58:01,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:01,974 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 374 transitions. [2021-08-06 14:58:01,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 14:58:01,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:01,975 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:02,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:02,188 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 [2021-08-06 14:58:02,189 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:02,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:02,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1216183969, now seen corresponding path program 8 times [2021-08-06 14:58:02,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:02,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449606482] [2021-08-06 14:58:02,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:02,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:02,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:02,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449606482] [2021-08-06 14:58:02,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449606482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:02,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886878259] [2021-08-06 14:58:02,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:58:02,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:02,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:02,305 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) [2021-08-06 14:58:02,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 14:58:02,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:58:02,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:02,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:58:02,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:02,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886878259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:02,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:02,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-06 14:58:02,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78595506] [2021-08-06 14:58:02,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:58:02,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:02,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:58:02,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:58:02,925 INFO L87 Difference]: Start difference. First operand 173 states and 374 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-08-06 14:58:03,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:03,455 INFO L93 Difference]: Finished difference Result 435 states and 865 transitions. [2021-08-06 14:58:03,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:58:03,456 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 25 [2021-08-06 14:58:03,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:03,459 INFO L225 Difference]: With dead ends: 435 [2021-08-06 14:58:03,459 INFO L226 Difference]: Without dead ends: 417 [2021-08-06 14:58:03,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 511.6ms TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 14:58:03,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-08-06 14:58:03,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 186. [2021-08-06 14:58:03,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.156756756756757) internal successors, (399), 185 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:03,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 399 transitions. [2021-08-06 14:58:03,466 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 399 transitions. Word has length 25 [2021-08-06 14:58:03,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:03,467 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 399 transitions. [2021-08-06 14:58:03,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-08-06 14:58:03,467 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 399 transitions. [2021-08-06 14:58:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 14:58:03,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:03,468 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:03,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:03,688 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 [2021-08-06 14:58:03,689 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:03,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:03,689 INFO L82 PathProgramCache]: Analyzing trace with hash -580006123, now seen corresponding path program 9 times [2021-08-06 14:58:03,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:03,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792842209] [2021-08-06 14:58:03,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:03,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:03,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:03,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792842209] [2021-08-06 14:58:03,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792842209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:03,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693285228] [2021-08-06 14:58:03,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:58:03,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:03,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:03,799 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) [2021-08-06 14:58:03,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 14:58:03,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:58:03,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:03,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:58:03,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:04,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693285228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:04,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:04,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-08-06 14:58:04,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854356405] [2021-08-06 14:58:04,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:58:04,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:04,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:58:04,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:58:04,395 INFO L87 Difference]: Start difference. First operand 186 states and 399 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-08-06 14:58:04,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:04,867 INFO L93 Difference]: Finished difference Result 340 states and 687 transitions. [2021-08-06 14:58:04,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:58:04,870 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 14:58:04,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:04,872 INFO L225 Difference]: With dead ends: 340 [2021-08-06 14:58:04,872 INFO L226 Difference]: Without dead ends: 336 [2021-08-06 14:58:04,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 461.1ms TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:58:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-08-06 14:58:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 186. [2021-08-06 14:58:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.151351351351351) internal successors, (398), 185 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 398 transitions. [2021-08-06 14:58:04,880 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 398 transitions. Word has length 25 [2021-08-06 14:58:04,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:04,880 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 398 transitions. [2021-08-06 14:58:04,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-08-06 14:58:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 398 transitions. [2021-08-06 14:58:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:58:04,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:04,881 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:04,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:05,096 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 [2021-08-06 14:58:05,097 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:05,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:05,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1444914083, now seen corresponding path program 10 times [2021-08-06 14:58:05,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:05,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987061044] [2021-08-06 14:58:05,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:05,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:05,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:05,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987061044] [2021-08-06 14:58:05,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987061044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:05,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237081980] [2021-08-06 14:58:05,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:58:05,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:05,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:05,200 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) [2021-08-06 14:58:05,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 14:58:05,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:58:05,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:05,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:58:05,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:05,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237081980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:05,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:05,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 14:58:05,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120681042] [2021-08-06 14:58:05,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:58:05,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:05,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:58:05,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:58:05,666 INFO L87 Difference]: Start difference. First operand 186 states and 398 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:05,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:05,697 INFO L93 Difference]: Finished difference Result 354 states and 734 transitions. [2021-08-06 14:58:05,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:58:05,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:58:05,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:05,701 INFO L225 Difference]: With dead ends: 354 [2021-08-06 14:58:05,701 INFO L226 Difference]: Without dead ends: 321 [2021-08-06 14:58:05,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:58:05,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-08-06 14:58:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 242. [2021-08-06 14:58:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.203319502074689) internal successors, (531), 241 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 531 transitions. [2021-08-06 14:58:05,711 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 531 transitions. Word has length 27 [2021-08-06 14:58:05,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:05,711 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 531 transitions. [2021-08-06 14:58:05,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 531 transitions. [2021-08-06 14:58:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:58:05,712 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:05,712 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:05,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:05,929 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 [2021-08-06 14:58:05,929 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:05,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:05,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1020645679, now seen corresponding path program 11 times [2021-08-06 14:58:05,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:05,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925078413] [2021-08-06 14:58:05,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:05,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:06,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:06,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925078413] [2021-08-06 14:58:06,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925078413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:06,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558917798] [2021-08-06 14:58:06,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:58:06,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:06,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:06,131 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) [2021-08-06 14:58:06,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 14:58:06,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:58:06,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:06,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:58:06,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:06,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558917798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:06,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:06,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-06 14:58:06,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111799164] [2021-08-06 14:58:06,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:58:06,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:06,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:58:06,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:58:06,829 INFO L87 Difference]: Start difference. First operand 242 states and 531 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:07,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:07,635 INFO L93 Difference]: Finished difference Result 559 states and 1127 transitions. [2021-08-06 14:58:07,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:58:07,636 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:58:07,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:07,638 INFO L225 Difference]: With dead ends: 559 [2021-08-06 14:58:07,638 INFO L226 Difference]: Without dead ends: 553 [2021-08-06 14:58:07,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 746.5ms TimeCoverageRelationStatistics Valid=368, Invalid=1702, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 14:58:07,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-08-06 14:58:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 234. [2021-08-06 14:58:07,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.2060085836909873) internal successors, (514), 233 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:07,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 514 transitions. [2021-08-06 14:58:07,649 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 514 transitions. Word has length 27 [2021-08-06 14:58:07,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:07,650 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 514 transitions. [2021-08-06 14:58:07,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:07,650 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 514 transitions. [2021-08-06 14:58:07,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:58:07,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:07,651 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:07,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:07,864 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 [2021-08-06 14:58:07,865 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:07,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:07,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1006035635, now seen corresponding path program 12 times [2021-08-06 14:58:07,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:07,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815253435] [2021-08-06 14:58:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:07,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:08,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:08,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815253435] [2021-08-06 14:58:08,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815253435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:08,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331155730] [2021-08-06 14:58:08,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:58:08,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:08,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:08,037 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) [2021-08-06 14:58:08,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 14:58:08,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:58:08,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:08,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:58:08,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:08,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331155730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:08,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:08,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-06 14:58:08,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484825261] [2021-08-06 14:58:08,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:58:08,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:08,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:58:08,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:58:08,746 INFO L87 Difference]: Start difference. First operand 234 states and 514 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:09,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:09,475 INFO L93 Difference]: Finished difference Result 976 states and 2009 transitions. [2021-08-06 14:58:09,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 14:58:09,476 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:58:09,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:09,480 INFO L225 Difference]: With dead ends: 976 [2021-08-06 14:58:09,480 INFO L226 Difference]: Without dead ends: 940 [2021-08-06 14:58:09,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 647.0ms TimeCoverageRelationStatistics Valid=488, Invalid=1864, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 14:58:09,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-08-06 14:58:09,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 311. [2021-08-06 14:58:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.229032258064516) internal successors, (691), 310 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 691 transitions. [2021-08-06 14:58:09,492 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 691 transitions. Word has length 27 [2021-08-06 14:58:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:09,492 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 691 transitions. [2021-08-06 14:58:09,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 691 transitions. [2021-08-06 14:58:09,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:58:09,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:09,493 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:09,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:09,715 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 [2021-08-06 14:58:09,716 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:09,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:09,716 INFO L82 PathProgramCache]: Analyzing trace with hash 275669725, now seen corresponding path program 13 times [2021-08-06 14:58:09,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:09,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122105896] [2021-08-06 14:58:09,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:09,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:09,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:09,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122105896] [2021-08-06 14:58:09,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122105896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:09,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245883937] [2021-08-06 14:58:09,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:58:09,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:09,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:09,869 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) [2021-08-06 14:58:09,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 14:58:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:10,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:58:10,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:10,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245883937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:10,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:10,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 14:58:10,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29553186] [2021-08-06 14:58:10,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:58:10,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:10,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:58:10,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:58:10,707 INFO L87 Difference]: Start difference. First operand 311 states and 691 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-08-06 14:58:11,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:11,555 INFO L93 Difference]: Finished difference Result 802 states and 1701 transitions. [2021-08-06 14:58:11,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 14:58:11,555 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 [2021-08-06 14:58:11,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:11,558 INFO L225 Difference]: With dead ends: 802 [2021-08-06 14:58:11,558 INFO L226 Difference]: Without dead ends: 794 [2021-08-06 14:58:11,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 730.0ms TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 14:58:11,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-08-06 14:58:11,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 259. [2021-08-06 14:58:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.182170542635659) internal successors, (563), 258 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 563 transitions. [2021-08-06 14:58:11,571 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 563 transitions. Word has length 27 [2021-08-06 14:58:11,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:11,572 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 563 transitions. [2021-08-06 14:58:11,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-08-06 14:58:11,572 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 563 transitions. [2021-08-06 14:58:11,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:58:11,572 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:11,572 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:11,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:11,792 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 [2021-08-06 14:58:11,793 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:11,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:11,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1973910373, now seen corresponding path program 14 times [2021-08-06 14:58:11,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:11,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458780133] [2021-08-06 14:58:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:11,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:11,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:11,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458780133] [2021-08-06 14:58:11,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458780133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:11,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288532001] [2021-08-06 14:58:11,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:58:11,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:11,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:11,930 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) [2021-08-06 14:58:11,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 14:58:12,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:58:12,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:12,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:58:12,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:12,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288532001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:12,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:12,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 14:58:12,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151962854] [2021-08-06 14:58:12,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 14:58:12,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:12,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 14:58:12,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:58:12,718 INFO L87 Difference]: Start difference. First operand 259 states and 563 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:13,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:13,599 INFO L93 Difference]: Finished difference Result 680 states and 1358 transitions. [2021-08-06 14:58:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 14:58:13,599 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:58:13,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:13,602 INFO L225 Difference]: With dead ends: 680 [2021-08-06 14:58:13,602 INFO L226 Difference]: Without dead ends: 638 [2021-08-06 14:58:13,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 792.6ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 14:58:13,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-08-06 14:58:13,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 270. [2021-08-06 14:58:13,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.163568773234201) internal successors, (582), 269 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:13,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 582 transitions. [2021-08-06 14:58:13,615 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 582 transitions. Word has length 29 [2021-08-06 14:58:13,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:13,615 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 582 transitions. [2021-08-06 14:58:13,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:13,615 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 582 transitions. [2021-08-06 14:58:13,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:58:13,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:13,617 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:13,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:13,828 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 [2021-08-06 14:58:13,829 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash 592333205, now seen corresponding path program 15 times [2021-08-06 14:58:13,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:13,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371407438] [2021-08-06 14:58:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:13,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:13,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:13,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371407438] [2021-08-06 14:58:13,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371407438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:13,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28486919] [2021-08-06 14:58:13,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:58:13,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:13,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:13,938 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) [2021-08-06 14:58:13,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 14:58:14,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:58:14,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:14,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:58:14,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:14,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28486919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:14,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:14,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 19 [2021-08-06 14:58:14,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322834139] [2021-08-06 14:58:14,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:58:14,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:14,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:58:14,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:58:14,783 INFO L87 Difference]: Start difference. First operand 270 states and 582 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:15,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:15,969 INFO L93 Difference]: Finished difference Result 543 states and 1104 transitions. [2021-08-06 14:58:15,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 14:58:15,969 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:58:15,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:15,971 INFO L225 Difference]: With dead ends: 543 [2021-08-06 14:58:15,972 INFO L226 Difference]: Without dead ends: 539 [2021-08-06 14:58:15,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 1058.6ms TimeCoverageRelationStatistics Valid=1015, Invalid=3145, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 14:58:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-08-06 14:58:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 270. [2021-08-06 14:58:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.159851301115242) internal successors, (581), 269 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:15,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 581 transitions. [2021-08-06 14:58:15,980 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 581 transitions. Word has length 29 [2021-08-06 14:58:15,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:15,981 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 581 transitions. [2021-08-06 14:58:15,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:15,981 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 581 transitions. [2021-08-06 14:58:15,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 14:58:15,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:15,982 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:16,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-06 14:58:16,197 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 [2021-08-06 14:58:16,197 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash 524451993, now seen corresponding path program 16 times [2021-08-06 14:58:16,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:16,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137307574] [2021-08-06 14:58:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:16,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:16,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:16,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137307574] [2021-08-06 14:58:16,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137307574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:16,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541082986] [2021-08-06 14:58:16,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:58:16,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:16,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:16,303 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) [2021-08-06 14:58:16,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 14:58:16,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:58:16,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:16,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:58:16,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:16,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541082986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:16,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:16,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 14:58:16,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264815036] [2021-08-06 14:58:16,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:58:16,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:16,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:58:16,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:58:16,934 INFO L87 Difference]: Start difference. First operand 270 states and 581 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:16,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:16,986 INFO L93 Difference]: Finished difference Result 492 states and 1028 transitions. [2021-08-06 14:58:16,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:58:16,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 14:58:16,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:16,989 INFO L225 Difference]: With dead ends: 492 [2021-08-06 14:58:16,989 INFO L226 Difference]: Without dead ends: 453 [2021-08-06 14:58:16,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:58:16,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-06 14:58:16,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 337. [2021-08-06 14:58:16,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.1845238095238093) internal successors, (734), 336 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 734 transitions. [2021-08-06 14:58:17,001 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 734 transitions. Word has length 31 [2021-08-06 14:58:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:17,001 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 734 transitions. [2021-08-06 14:58:17,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:17,001 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 734 transitions. [2021-08-06 14:58:17,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 14:58:17,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:17,002 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:17,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:17,202 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 [2021-08-06 14:58:17,202 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:17,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:17,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2075385877, now seen corresponding path program 17 times [2021-08-06 14:58:17,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:17,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825727111] [2021-08-06 14:58:17,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:17,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:17,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:17,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825727111] [2021-08-06 14:58:17,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825727111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:17,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589873869] [2021-08-06 14:58:17,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:58:17,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:17,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:17,436 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) [2021-08-06 14:58:17,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 14:58:17,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:58:17,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:17,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:58:17,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:18,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589873869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:18,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:18,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-06 14:58:18,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651127811] [2021-08-06 14:58:18,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 14:58:18,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:18,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 14:58:18,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:58:18,412 INFO L87 Difference]: Start difference. First operand 337 states and 734 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:19,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:19,561 INFO L93 Difference]: Finished difference Result 772 states and 1552 transitions. [2021-08-06 14:58:19,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 14:58:19,562 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 14:58:19,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:19,565 INFO L225 Difference]: With dead ends: 772 [2021-08-06 14:58:19,565 INFO L226 Difference]: Without dead ends: 766 [2021-08-06 14:58:19,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 982.3ms TimeCoverageRelationStatistics Valid=490, Invalid=2816, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 14:58:19,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-08-06 14:58:19,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 328. [2021-08-06 14:58:19,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.2110091743119265) internal successors, (723), 327 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 723 transitions. [2021-08-06 14:58:19,575 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 723 transitions. Word has length 31 [2021-08-06 14:58:19,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:19,575 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 723 transitions. [2021-08-06 14:58:19,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:19,575 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 723 transitions. [2021-08-06 14:58:19,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 14:58:19,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:19,576 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:19,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:19,798 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 [2021-08-06 14:58:19,798 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:19,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1140769135, now seen corresponding path program 18 times [2021-08-06 14:58:19,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:19,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374704767] [2021-08-06 14:58:19,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:19,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:19,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:19,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374704767] [2021-08-06 14:58:19,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374704767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:19,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460894734] [2021-08-06 14:58:19,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:58:19,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:19,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:19,982 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) [2021-08-06 14:58:19,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 14:58:20,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:58:20,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:20,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:58:20,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:20,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460894734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:20,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:20,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 14:58:20,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738188373] [2021-08-06 14:58:20,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:58:20,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:20,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:58:20,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:58:20,953 INFO L87 Difference]: Start difference. First operand 328 states and 723 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:22,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:22,297 INFO L93 Difference]: Finished difference Result 1342 states and 2716 transitions. [2021-08-06 14:58:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 14:58:22,297 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 14:58:22,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:22,301 INFO L225 Difference]: With dead ends: 1342 [2021-08-06 14:58:22,301 INFO L226 Difference]: Without dead ends: 1318 [2021-08-06 14:58:22,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 1099.2ms TimeCoverageRelationStatistics Valid=720, Invalid=3312, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 14:58:22,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-08-06 14:58:22,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 404. [2021-08-06 14:58:22,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.2531017369727047) internal successors, (908), 403 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:22,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 908 transitions. [2021-08-06 14:58:22,315 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 908 transitions. Word has length 31 [2021-08-06 14:58:22,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:22,315 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 908 transitions. [2021-08-06 14:58:22,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:22,315 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 908 transitions. [2021-08-06 14:58:22,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 14:58:22,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:22,316 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:22,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:22,539 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 [2021-08-06 14:58:22,539 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:22,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:22,540 INFO L82 PathProgramCache]: Analyzing trace with hash 410403225, now seen corresponding path program 19 times [2021-08-06 14:58:22,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:22,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400953212] [2021-08-06 14:58:22,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:22,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:22,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:22,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400953212] [2021-08-06 14:58:22,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400953212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:22,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962249881] [2021-08-06 14:58:22,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:58:22,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:22,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:22,695 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) [2021-08-06 14:58:22,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 14:58:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:23,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:58:23,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:23,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962249881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:23,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:23,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-08-06 14:58:23,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031521193] [2021-08-06 14:58:23,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 14:58:23,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:23,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 14:58:23,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:58:23,696 INFO L87 Difference]: Start difference. First operand 404 states and 908 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:24,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:24,890 INFO L93 Difference]: Finished difference Result 1094 states and 2288 transitions. [2021-08-06 14:58:24,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 14:58:24,891 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 14:58:24,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:24,894 INFO L225 Difference]: With dead ends: 1094 [2021-08-06 14:58:24,894 INFO L226 Difference]: Without dead ends: 1090 [2021-08-06 14:58:24,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1031.4ms TimeCoverageRelationStatistics Valid=599, Invalid=3061, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 14:58:24,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-08-06 14:58:24,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 333. [2021-08-06 14:58:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.2198795180722892) internal successors, (737), 332 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 737 transitions. [2021-08-06 14:58:24,906 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 737 transitions. Word has length 31 [2021-08-06 14:58:24,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:24,906 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 737 transitions. [2021-08-06 14:58:24,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:24,906 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 737 transitions. [2021-08-06 14:58:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 14:58:24,907 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:24,907 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:24,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:25,120 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 [2021-08-06 14:58:25,121 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:25,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:25,121 INFO L82 PathProgramCache]: Analyzing trace with hash 33558515, now seen corresponding path program 20 times [2021-08-06 14:58:25,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:25,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974597022] [2021-08-06 14:58:25,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:25,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:25,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:25,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974597022] [2021-08-06 14:58:25,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974597022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:25,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101697919] [2021-08-06 14:58:25,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:58:25,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:25,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:25,328 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) [2021-08-06 14:58:25,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 14:58:25,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:58:25,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:25,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:58:25,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:26,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101697919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:26,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:26,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-06 14:58:26,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718033633] [2021-08-06 14:58:26,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 14:58:26,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:26,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 14:58:26,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:58:26,384 INFO L87 Difference]: Start difference. First operand 333 states and 737 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:27,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:27,393 INFO L93 Difference]: Finished difference Result 1727 states and 3552 transitions. [2021-08-06 14:58:27,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 14:58:27,393 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 14:58:27,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:27,398 INFO L225 Difference]: With dead ends: 1727 [2021-08-06 14:58:27,398 INFO L226 Difference]: Without dead ends: 1631 [2021-08-06 14:58:27,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 875.5ms TimeCoverageRelationStatistics Valid=702, Invalid=2958, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 14:58:27,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-08-06 14:58:27,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 419. [2021-08-06 14:58:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.229665071770335) internal successors, (932), 418 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 932 transitions. [2021-08-06 14:58:27,412 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 932 transitions. Word has length 31 [2021-08-06 14:58:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:27,412 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 932 transitions. [2021-08-06 14:58:27,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 932 transitions. [2021-08-06 14:58:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 14:58:27,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:27,414 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:27,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-06 14:58:27,629 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 [2021-08-06 14:58:27,629 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:27,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:27,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1802444585, now seen corresponding path program 21 times [2021-08-06 14:58:27,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:27,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787451964] [2021-08-06 14:58:27,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:27,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:27,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:27,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787451964] [2021-08-06 14:58:27,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787451964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:27,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454253371] [2021-08-06 14:58:27,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:58:27,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:27,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:27,764 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) [2021-08-06 14:58:27,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 14:58:28,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:58:28,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:28,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 14:58:28,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:28,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454253371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:28,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:28,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-08-06 14:58:28,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234298307] [2021-08-06 14:58:28,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:58:28,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:28,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:58:28,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:58:28,910 INFO L87 Difference]: Start difference. First operand 419 states and 932 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:30,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:30,136 INFO L93 Difference]: Finished difference Result 1314 states and 2779 transitions. [2021-08-06 14:58:30,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 14:58:30,137 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 14:58:30,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:30,140 INFO L225 Difference]: With dead ends: 1314 [2021-08-06 14:58:30,140 INFO L226 Difference]: Without dead ends: 1310 [2021-08-06 14:58:30,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 1083.1ms TimeCoverageRelationStatistics Valid=1021, Invalid=3535, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 14:58:30,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-08-06 14:58:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 563. [2021-08-06 14:58:30,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.314946619217082) internal successors, (1301), 562 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1301 transitions. [2021-08-06 14:58:30,159 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1301 transitions. Word has length 31 [2021-08-06 14:58:30,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:30,159 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 1301 transitions. [2021-08-06 14:58:30,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:30,159 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1301 transitions. [2021-08-06 14:58:30,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:58:30,160 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:30,160 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:30,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:30,383 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 [2021-08-06 14:58:30,384 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:30,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:30,384 INFO L82 PathProgramCache]: Analyzing trace with hash 986733015, now seen corresponding path program 22 times [2021-08-06 14:58:30,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:30,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105144813] [2021-08-06 14:58:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:30,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:30,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:30,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105144813] [2021-08-06 14:58:30,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105144813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:30,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809870910] [2021-08-06 14:58:30,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:58:30,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:30,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:30,569 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:58:30,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 14:58:31,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:58:31,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:31,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:58:31,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:31,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809870910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:31,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:31,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-06 14:58:31,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82156517] [2021-08-06 14:58:31,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 14:58:31,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:31,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 14:58:31,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:58:31,714 INFO L87 Difference]: Start difference. First operand 563 states and 1301 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:32,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:32,890 INFO L93 Difference]: Finished difference Result 1171 states and 2456 transitions. [2021-08-06 14:58:32,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 14:58:32,890 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:58:32,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:32,894 INFO L225 Difference]: With dead ends: 1171 [2021-08-06 14:58:32,894 INFO L226 Difference]: Without dead ends: 1099 [2021-08-06 14:58:32,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 1047.9ms TimeCoverageRelationStatistics Valid=1404, Invalid=3998, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 14:58:32,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-08-06 14:58:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 572. [2021-08-06 14:58:32,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.3012259194395797) internal successors, (1314), 571 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:32,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1314 transitions. [2021-08-06 14:58:32,908 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1314 transitions. Word has length 33 [2021-08-06 14:58:32,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:32,908 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 1314 transitions. [2021-08-06 14:58:32,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:32,908 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1314 transitions. [2021-08-06 14:58:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:58:32,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:32,910 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:32,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-06 14:58:33,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:33,125 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:33,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:33,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1374694123, now seen corresponding path program 23 times [2021-08-06 14:58:33,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:33,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274427591] [2021-08-06 14:58:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:33,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:33,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:33,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274427591] [2021-08-06 14:58:33,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274427591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:33,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852844610] [2021-08-06 14:58:33,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:58:33,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:33,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:33,237 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:58:33,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 14:58:33,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 14:58:33,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:33,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:58:33,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:34,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852844610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:34,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:34,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-08-06 14:58:34,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654225032] [2021-08-06 14:58:34,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:58:34,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:34,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:58:34,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:58:34,540 INFO L87 Difference]: Start difference. First operand 572 states and 1314 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:36,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:36,172 INFO L93 Difference]: Finished difference Result 984 states and 2110 transitions. [2021-08-06 14:58:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-06 14:58:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:58:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:36,175 INFO L225 Difference]: With dead ends: 984 [2021-08-06 14:58:36,176 INFO L226 Difference]: Without dead ends: 980 [2021-08-06 14:58:36,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 1505.9ms TimeCoverageRelationStatistics Valid=1834, Invalid=5822, Unknown=0, NotChecked=0, Total=7656 [2021-08-06 14:58:36,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-08-06 14:58:36,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 572. [2021-08-06 14:58:36,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.2994746059544657) internal successors, (1313), 571 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:36,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1313 transitions. [2021-08-06 14:58:36,197 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1313 transitions. Word has length 33 [2021-08-06 14:58:36,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:36,197 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 1313 transitions. [2021-08-06 14:58:36,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:36,197 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1313 transitions. [2021-08-06 14:58:36,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:58:36,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:36,198 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:36,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:36,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:36,419 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:36,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:36,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1860569387, now seen corresponding path program 24 times [2021-08-06 14:58:36,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:36,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578744355] [2021-08-06 14:58:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:36,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:36,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:36,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578744355] [2021-08-06 14:58:36,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578744355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:36,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219371777] [2021-08-06 14:58:36,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:58:36,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:36,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:36,549 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:58:36,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 14:58:37,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:58:37,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:37,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:58:37,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:37,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219371777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:37,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:37,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2021-08-06 14:58:37,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156156593] [2021-08-06 14:58:37,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:58:37,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:37,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:58:37,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:58:37,601 INFO L87 Difference]: Start difference. First operand 572 states and 1313 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:37,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:37,724 INFO L93 Difference]: Finished difference Result 950 states and 2099 transitions. [2021-08-06 14:58:37,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:58:37,724 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:58:37,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:37,727 INFO L225 Difference]: With dead ends: 950 [2021-08-06 14:58:37,727 INFO L226 Difference]: Without dead ends: 896 [2021-08-06 14:58:37,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:58:37,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-08-06 14:58:37,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 724. [2021-08-06 14:58:37,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.336099585062241) internal successors, (1689), 723 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:37,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1689 transitions. [2021-08-06 14:58:37,741 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1689 transitions. Word has length 35 [2021-08-06 14:58:37,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:37,741 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 1689 transitions. [2021-08-06 14:58:37,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1689 transitions. [2021-08-06 14:58:37,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:58:37,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:37,743 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:37,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:37,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-06 14:58:37,967 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:37,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:37,967 INFO L82 PathProgramCache]: Analyzing trace with hash 905400875, now seen corresponding path program 25 times [2021-08-06 14:58:37,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:37,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355701041] [2021-08-06 14:58:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:37,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:38,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:38,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355701041] [2021-08-06 14:58:38,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355701041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:38,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507251192] [2021-08-06 14:58:38,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:58:38,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:38,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:38,266 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:58:38,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 14:58:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:38,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 14:58:38,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:39,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507251192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:39,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:39,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-08-06 14:58:39,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727149196] [2021-08-06 14:58:39,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 14:58:39,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:39,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 14:58:39,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:58:39,622 INFO L87 Difference]: Start difference. First operand 724 states and 1689 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:40,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:40,465 INFO L93 Difference]: Finished difference Result 2030 states and 4301 transitions. [2021-08-06 14:58:40,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 14:58:40,473 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:58:40,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:40,480 INFO L225 Difference]: With dead ends: 2030 [2021-08-06 14:58:40,480 INFO L226 Difference]: Without dead ends: 2000 [2021-08-06 14:58:40,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 726.2ms TimeCoverageRelationStatistics Valid=479, Invalid=2277, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 14:58:40,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-08-06 14:58:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 827. [2021-08-06 14:58:40,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 2.3389830508474576) internal successors, (1932), 826 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:40,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1932 transitions. [2021-08-06 14:58:40,506 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1932 transitions. Word has length 35 [2021-08-06 14:58:40,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:40,506 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1932 transitions. [2021-08-06 14:58:40,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:40,507 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1932 transitions. [2021-08-06 14:58:40,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:58:40,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:40,510 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:40,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:40,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 14:58:40,734 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:40,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:40,735 INFO L82 PathProgramCache]: Analyzing trace with hash 175034965, now seen corresponding path program 26 times [2021-08-06 14:58:40,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:40,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937779257] [2021-08-06 14:58:40,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:40,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:40,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:40,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937779257] [2021-08-06 14:58:40,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937779257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:40,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057749283] [2021-08-06 14:58:40,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:58:40,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:40,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:40,929 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:58:40,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 14:58:41,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:58:41,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:41,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 14:58:41,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:42,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057749283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:42,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:42,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-08-06 14:58:42,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566328338] [2021-08-06 14:58:42,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 14:58:42,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:42,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 14:58:42,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:58:42,322 INFO L87 Difference]: Start difference. First operand 827 states and 1932 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:43,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:43,922 INFO L93 Difference]: Finished difference Result 1883 states and 4107 transitions. [2021-08-06 14:58:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 14:58:43,923 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:58:43,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:43,928 INFO L225 Difference]: With dead ends: 1883 [2021-08-06 14:58:43,928 INFO L226 Difference]: Without dead ends: 1879 [2021-08-06 14:58:43,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 1250.2ms TimeCoverageRelationStatistics Valid=761, Invalid=4495, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 14:58:43,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-08-06 14:58:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 806. [2021-08-06 14:58:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 2.3354037267080745) internal successors, (1880), 805 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1880 transitions. [2021-08-06 14:58:43,948 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1880 transitions. Word has length 35 [2021-08-06 14:58:43,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:43,948 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1880 transitions. [2021-08-06 14:58:43,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:43,948 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1880 transitions. [2021-08-06 14:58:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:58:43,950 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:43,950 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:43,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:44,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 14:58:44,156 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:44,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:44,156 INFO L82 PathProgramCache]: Analyzing trace with hash -247320401, now seen corresponding path program 27 times [2021-08-06 14:58:44,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:44,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927086997] [2021-08-06 14:58:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:44,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:44,359 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:44,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:44,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927086997] [2021-08-06 14:58:44,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927086997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:44,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706137581] [2021-08-06 14:58:44,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:58:44,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:44,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:44,361 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:58:44,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 14:58:45,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 14:58:45,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:45,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:58:45,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:45,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706137581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:45,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:45,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-06 14:58:45,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243326168] [2021-08-06 14:58:45,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 14:58:45,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:45,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 14:58:45,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:58:45,796 INFO L87 Difference]: Start difference. First operand 806 states and 1880 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:47,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:47,530 INFO L93 Difference]: Finished difference Result 2852 states and 5980 transitions. [2021-08-06 14:58:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 14:58:47,531 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:58:47,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:47,541 INFO L225 Difference]: With dead ends: 2852 [2021-08-06 14:58:47,541 INFO L226 Difference]: Without dead ends: 2756 [2021-08-06 14:58:47,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2211 ImplicationChecksByTransitivity, 1352.2ms TimeCoverageRelationStatistics Valid=1231, Invalid=5741, Unknown=0, NotChecked=0, Total=6972 [2021-08-06 14:58:47,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-08-06 14:58:47,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 765. [2021-08-06 14:58:47,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 2.3481675392670156) internal successors, (1794), 764 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1794 transitions. [2021-08-06 14:58:47,565 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1794 transitions. Word has length 35 [2021-08-06 14:58:47,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:47,565 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 1794 transitions. [2021-08-06 14:58:47,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:47,565 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1794 transitions. [2021-08-06 14:58:47,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:58:47,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:47,567 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:47,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:47,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 14:58:47,781 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:47,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1762753587, now seen corresponding path program 28 times [2021-08-06 14:58:47,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:47,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749209179] [2021-08-06 14:58:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:47,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:47,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:47,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749209179] [2021-08-06 14:58:47,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749209179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:47,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761506282] [2021-08-06 14:58:47,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:58:47,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:47,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:47,977 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:58:47,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 14:58:48,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:58:48,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:48,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:58:48,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:49,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761506282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:49,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:49,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-06 14:58:49,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092270108] [2021-08-06 14:58:49,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 14:58:49,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:49,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 14:58:49,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:58:49,488 INFO L87 Difference]: Start difference. First operand 765 states and 1794 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:50,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:50,871 INFO L93 Difference]: Finished difference Result 3343 states and 7149 transitions. [2021-08-06 14:58:50,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 14:58:50,871 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:58:50,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:50,884 INFO L225 Difference]: With dead ends: 3343 [2021-08-06 14:58:50,884 INFO L226 Difference]: Without dead ends: 3160 [2021-08-06 14:58:50,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 1241.0ms TimeCoverageRelationStatistics Valid=1137, Invalid=4869, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 14:58:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3160 states. [2021-08-06 14:58:50,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3160 to 832. [2021-08-06 14:58:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 2.2803850782190134) internal successors, (1895), 831 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1895 transitions. [2021-08-06 14:58:50,915 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1895 transitions. Word has length 35 [2021-08-06 14:58:50,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:50,915 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1895 transitions. [2021-08-06 14:58:50,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:50,915 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1895 transitions. [2021-08-06 14:58:50,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:58:50,917 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:50,917 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:50,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-06 14:58:51,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:51,142 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:51,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:51,143 INFO L82 PathProgramCache]: Analyzing trace with hash 674574509, now seen corresponding path program 29 times [2021-08-06 14:58:51,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:51,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731127906] [2021-08-06 14:58:51,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:51,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:51,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:51,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731127906] [2021-08-06 14:58:51,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731127906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:51,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600515948] [2021-08-06 14:58:51,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:58:51,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:51,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:51,283 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:58:51,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 14:58:52,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:58:52,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:52,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:58:52,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:52,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600515948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:52,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:52,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-08-06 14:58:52,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272653315] [2021-08-06 14:58:52,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 14:58:52,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:52,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 14:58:52,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:58:52,798 INFO L87 Difference]: Start difference. First operand 832 states and 1895 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:54,762 INFO L93 Difference]: Finished difference Result 2247 states and 4845 transitions. [2021-08-06 14:58:54,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-06 14:58:54,763 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:58:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:54,767 INFO L225 Difference]: With dead ends: 2247 [2021-08-06 14:58:54,767 INFO L226 Difference]: Without dead ends: 2243 [2021-08-06 14:58:54,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 1708.5ms TimeCoverageRelationStatistics Valid=1854, Invalid=6518, Unknown=0, NotChecked=0, Total=8372 [2021-08-06 14:58:54,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2243 states. [2021-08-06 14:58:54,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2243 to 890. [2021-08-06 14:58:54,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 2.329583802024747) internal successors, (2071), 889 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:54,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 2071 transitions. [2021-08-06 14:58:54,787 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 2071 transitions. Word has length 35 [2021-08-06 14:58:54,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:54,787 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 2071 transitions. [2021-08-06 14:58:54,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:54,787 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 2071 transitions. [2021-08-06 14:58:54,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 14:58:54,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:54,789 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:54,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:54,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:54,991 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:54,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:54,991 INFO L82 PathProgramCache]: Analyzing trace with hash 326959379, now seen corresponding path program 30 times [2021-08-06 14:58:54,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:54,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472010105] [2021-08-06 14:58:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:54,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:55,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:55,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472010105] [2021-08-06 14:58:55,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472010105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:55,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451548587] [2021-08-06 14:58:55,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:58:55,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:55,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:55,185 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:58:55,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 14:58:56,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:58:56,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:56,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 14:58:56,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:56,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451548587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:56,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:56,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-08-06 14:58:56,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561670533] [2021-08-06 14:58:56,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 14:58:56,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:56,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 14:58:56,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:58:56,787 INFO L87 Difference]: Start difference. First operand 890 states and 2071 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:58,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:58,373 INFO L93 Difference]: Finished difference Result 1701 states and 3618 transitions. [2021-08-06 14:58:58,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-06 14:58:58,373 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 14:58:58,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:58,376 INFO L225 Difference]: With dead ends: 1701 [2021-08-06 14:58:58,376 INFO L226 Difference]: Without dead ends: 1593 [2021-08-06 14:58:58,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 1508.6ms TimeCoverageRelationStatistics Valid=2214, Invalid=6342, Unknown=0, NotChecked=0, Total=8556 [2021-08-06 14:58:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-08-06 14:58:58,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 897. [2021-08-06 14:58:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 2.3191964285714284) internal successors, (2078), 896 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2078 transitions. [2021-08-06 14:58:58,394 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2078 transitions. Word has length 37 [2021-08-06 14:58:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:58,394 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 2078 transitions. [2021-08-06 14:58:58,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:58,394 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2078 transitions. [2021-08-06 14:58:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 14:58:58,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:58,396 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:58,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-06 14:58:58,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-06 14:58:58,616 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:58:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:58,616 INFO L82 PathProgramCache]: Analyzing trace with hash -177098347, now seen corresponding path program 31 times [2021-08-06 14:58:58,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:58,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68397392] [2021-08-06 14:58:58,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:58,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:58,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:58,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68397392] [2021-08-06 14:58:58,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68397392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:58,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475395795] [2021-08-06 14:58:58,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:58:58,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:58,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:58,738 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:58:58,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 14:58:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:59,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:58:59,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:00,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475395795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:00,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:00,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-08-06 14:59:00,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792646692] [2021-08-06 14:59:00,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:59:00,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:00,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:59:00,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:59:00,317 INFO L87 Difference]: Start difference. First operand 897 states and 2078 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:01,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:01,867 INFO L93 Difference]: Finished difference Result 1393 states and 3038 transitions. [2021-08-06 14:59:01,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-06 14:59:01,868 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 14:59:01,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:01,870 INFO L225 Difference]: With dead ends: 1393 [2021-08-06 14:59:01,870 INFO L226 Difference]: Without dead ends: 1389 [2021-08-06 14:59:01,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1413.3ms TimeCoverageRelationStatistics Valid=1742, Invalid=5568, Unknown=0, NotChecked=0, Total=7310 [2021-08-06 14:59:01,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-08-06 14:59:01,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 877. [2021-08-06 14:59:01,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 2.3253424657534247) internal successors, (2037), 876 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2037 transitions. [2021-08-06 14:59:01,886 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2037 transitions. Word has length 37 [2021-08-06 14:59:01,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:01,886 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 2037 transitions. [2021-08-06 14:59:01,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:01,886 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2037 transitions. [2021-08-06 14:59:01,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 14:59:01,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:01,888 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:01,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-06 14:59:02,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:02,109 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:02,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:02,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1717152663, now seen corresponding path program 32 times [2021-08-06 14:59:02,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:02,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445529145] [2021-08-06 14:59:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:02,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:59:02,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:02,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445529145] [2021-08-06 14:59:02,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445529145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:02,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198704718] [2021-08-06 14:59:02,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:59:02,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:02,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:02,244 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:59:02,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 14:59:03,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:59:03,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:03,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:59:03,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:03,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198704718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:03,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:03,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-08-06 14:59:03,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819726628] [2021-08-06 14:59:03,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 14:59:03,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:03,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 14:59:03,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:59:03,872 INFO L87 Difference]: Start difference. First operand 877 states and 2037 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:05,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:05,112 INFO L93 Difference]: Finished difference Result 2246 states and 4900 transitions. [2021-08-06 14:59:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 14:59:05,112 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 14:59:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:05,117 INFO L225 Difference]: With dead ends: 2246 [2021-08-06 14:59:05,117 INFO L226 Difference]: Without dead ends: 2237 [2021-08-06 14:59:05,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 970.3ms TimeCoverageRelationStatistics Valid=894, Invalid=3528, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 14:59:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-08-06 14:59:05,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 1417. [2021-08-06 14:59:05,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1416 states have (on average 2.3834745762711864) internal successors, (3375), 1416 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 3375 transitions. [2021-08-06 14:59:05,146 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 3375 transitions. Word has length 37 [2021-08-06 14:59:05,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:05,146 INFO L470 AbstractCegarLoop]: Abstraction has 1417 states and 3375 transitions. [2021-08-06 14:59:05,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:05,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 3375 transitions. [2021-08-06 14:59:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 14:59:05,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:05,149 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:05,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:05,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:05,377 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:05,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:05,377 INFO L82 PathProgramCache]: Analyzing trace with hash -247873775, now seen corresponding path program 33 times [2021-08-06 14:59:05,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:05,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380095962] [2021-08-06 14:59:05,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:05,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:05,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:05,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380095962] [2021-08-06 14:59:05,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380095962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:05,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331502455] [2021-08-06 14:59:05,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:59:05,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:05,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:05,525 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:59:05,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 14:59:06,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:59:06,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:06,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 14:59:06,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:06,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331502455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:06,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:06,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 15 [2021-08-06 14:59:06,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684923143] [2021-08-06 14:59:06,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:59:06,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:06,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:59:06,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:59:06,979 INFO L87 Difference]: Start difference. First operand 1417 states and 3375 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:07,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:07,129 INFO L93 Difference]: Finished difference Result 2089 states and 4899 transitions. [2021-08-06 14:59:07,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:59:07,129 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 14:59:07,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:07,133 INFO L225 Difference]: With dead ends: 2089 [2021-08-06 14:59:07,133 INFO L226 Difference]: Without dead ends: 2032 [2021-08-06 14:59:07,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:59:07,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-08-06 14:59:07,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1760. [2021-08-06 14:59:07,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 2.4178510517339395) internal successors, (4253), 1759 states have internal predecessors, (4253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:07,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 4253 transitions. [2021-08-06 14:59:07,163 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 4253 transitions. Word has length 39 [2021-08-06 14:59:07,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:07,163 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 4253 transitions. [2021-08-06 14:59:07,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:07,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 4253 transitions. [2021-08-06 14:59:07,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 14:59:07,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:07,167 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:07,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:07,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-06 14:59:07,381 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:07,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:07,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1725109521, now seen corresponding path program 34 times [2021-08-06 14:59:07,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:07,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317342249] [2021-08-06 14:59:07,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:07,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:07,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:07,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317342249] [2021-08-06 14:59:07,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317342249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:07,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937286187] [2021-08-06 14:59:07,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:59:07,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:07,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:07,643 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:59:07,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 14:59:08,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:59:08,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:08,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:59:08,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:09,472 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:09,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937286187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:09,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:09,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2021-08-06 14:59:09,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982550550] [2021-08-06 14:59:09,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 14:59:09,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:09,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 14:59:09,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:59:09,474 INFO L87 Difference]: Start difference. First operand 1760 states and 4253 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:11,838 INFO L93 Difference]: Finished difference Result 3244 states and 7341 transitions. [2021-08-06 14:59:11,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-06 14:59:11,839 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 14:59:11,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:11,847 INFO L225 Difference]: With dead ends: 3244 [2021-08-06 14:59:11,847 INFO L226 Difference]: Without dead ends: 3240 [2021-08-06 14:59:11,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2288 ImplicationChecksByTransitivity, 1736.5ms TimeCoverageRelationStatistics Valid=1013, Invalid=6819, Unknown=0, NotChecked=0, Total=7832 [2021-08-06 14:59:11,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2021-08-06 14:59:11,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 1846. [2021-08-06 14:59:11,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1845 states have (on average 2.419512195121951) internal successors, (4464), 1845 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:11,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 4464 transitions. [2021-08-06 14:59:11,886 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 4464 transitions. Word has length 39 [2021-08-06 14:59:11,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:11,886 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 4464 transitions. [2021-08-06 14:59:11,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:11,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 4464 transitions. [2021-08-06 14:59:11,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 14:59:11,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:11,891 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:11,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:12,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 14:59:12,117 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:12,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:12,117 INFO L82 PathProgramCache]: Analyzing trace with hash 204691563, now seen corresponding path program 35 times [2021-08-06 14:59:12,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:12,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545543081] [2021-08-06 14:59:12,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:12,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:59:12,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:12,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545543081] [2021-08-06 14:59:12,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545543081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:12,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489831734] [2021-08-06 14:59:12,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:59:12,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:12,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:12,349 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:59:12,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 14:59:13,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 14:59:13,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:13,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 14:59:13,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:14,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489831734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:14,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:14,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 30 [2021-08-06 14:59:14,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284773296] [2021-08-06 14:59:14,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 14:59:14,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:14,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 14:59:14,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:59:14,260 INFO L87 Difference]: Start difference. First operand 1846 states and 4464 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:16,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:16,701 INFO L93 Difference]: Finished difference Result 3849 states and 8630 transitions. [2021-08-06 14:59:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-06 14:59:16,703 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 14:59:16,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:16,708 INFO L225 Difference]: With dead ends: 3849 [2021-08-06 14:59:16,708 INFO L226 Difference]: Without dead ends: 3825 [2021-08-06 14:59:16,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 1769.2ms TimeCoverageRelationStatistics Valid=1319, Invalid=7801, Unknown=0, NotChecked=0, Total=9120 [2021-08-06 14:59:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2021-08-06 14:59:16,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 1766. [2021-08-06 14:59:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 2.424929178470255) internal successors, (4280), 1765 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:16,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 4280 transitions. [2021-08-06 14:59:16,743 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 4280 transitions. Word has length 39 [2021-08-06 14:59:16,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:16,743 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 4280 transitions. [2021-08-06 14:59:16,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:16,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 4280 transitions. [2021-08-06 14:59:16,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 14:59:16,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:16,747 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:16,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-06 14:59:16,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 14:59:16,970 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:16,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:16,970 INFO L82 PathProgramCache]: Analyzing trace with hash 516686699, now seen corresponding path program 36 times [2021-08-06 14:59:16,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:16,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407379338] [2021-08-06 14:59:16,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:16,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:17,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:17,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407379338] [2021-08-06 14:59:17,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407379338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:17,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180013153] [2021-08-06 14:59:17,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:59:17,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:17,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:17,193 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:59:17,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 14:59:18,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-06 14:59:18,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:18,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:59:18,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:19,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180013153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:19,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:19,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-08-06 14:59:19,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783619414] [2021-08-06 14:59:19,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 14:59:19,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:19,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 14:59:19,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:59:19,112 INFO L87 Difference]: Start difference. First operand 1766 states and 4280 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 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) [2021-08-06 14:59:21,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:21,643 INFO L93 Difference]: Finished difference Result 4814 states and 10624 transitions. [2021-08-06 14:59:21,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-06 14:59:21,644 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 14:59:21,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:21,650 INFO L225 Difference]: With dead ends: 4814 [2021-08-06 14:59:21,650 INFO L226 Difference]: Without dead ends: 4766 [2021-08-06 14:59:21,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3567 ImplicationChecksByTransitivity, 1867.5ms TimeCoverageRelationStatistics Valid=1716, Invalid=9204, Unknown=0, NotChecked=0, Total=10920 [2021-08-06 14:59:21,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4766 states. [2021-08-06 14:59:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4766 to 1566. [2021-08-06 14:59:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 2.4255591054313097) internal successors, (3796), 1565 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:21,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 3796 transitions. [2021-08-06 14:59:21,679 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 3796 transitions. Word has length 39 [2021-08-06 14:59:21,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:21,679 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 3796 transitions. [2021-08-06 14:59:21,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 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) [2021-08-06 14:59:21,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 3796 transitions. [2021-08-06 14:59:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 14:59:21,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:21,682 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:21,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-06 14:59:21,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:21,893 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:21,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:21,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1264787729, now seen corresponding path program 37 times [2021-08-06 14:59:21,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:21,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169131661] [2021-08-06 14:59:21,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:21,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:22,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:22,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169131661] [2021-08-06 14:59:22,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169131661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:22,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715494470] [2021-08-06 14:59:22,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:59:22,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:22,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:22,154 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:59:22,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 14:59:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:23,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:59:23,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:24,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715494470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:24,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:24,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-08-06 14:59:24,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676170038] [2021-08-06 14:59:24,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 14:59:24,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:24,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 14:59:24,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:59:24,179 INFO L87 Difference]: Start difference. First operand 1566 states and 3796 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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) [2021-08-06 14:59:26,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:26,076 INFO L93 Difference]: Finished difference Result 5523 states and 12031 transitions. [2021-08-06 14:59:26,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-06 14:59:26,076 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 14:59:26,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:26,083 INFO L225 Difference]: With dead ends: 5523 [2021-08-06 14:59:26,083 INFO L226 Difference]: Without dead ends: 5397 [2021-08-06 14:59:26,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2857 ImplicationChecksByTransitivity, 1600.3ms TimeCoverageRelationStatistics Valid=1522, Invalid=7220, Unknown=0, NotChecked=0, Total=8742 [2021-08-06 14:59:26,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-08-06 14:59:26,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 1582. [2021-08-06 14:59:26,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 2.4212523719165087) internal successors, (3828), 1581 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3828 transitions. [2021-08-06 14:59:26,115 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3828 transitions. Word has length 39 [2021-08-06 14:59:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:26,115 INFO L470 AbstractCegarLoop]: Abstraction has 1582 states and 3828 transitions. [2021-08-06 14:59:26,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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) [2021-08-06 14:59:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3828 transitions. [2021-08-06 14:59:26,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 14:59:26,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:26,118 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:26,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:26,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 14:59:26,344 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:26,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:26,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1338513549, now seen corresponding path program 38 times [2021-08-06 14:59:26,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:26,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387626626] [2021-08-06 14:59:26,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:26,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:26,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:26,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387626626] [2021-08-06 14:59:26,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387626626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:26,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917212852] [2021-08-06 14:59:26,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:59:26,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:26,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:26,574 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:59:26,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 14:59:27,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:59:27,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:27,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:59:27,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:28,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917212852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:28,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:28,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-06 14:59:28,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774380597] [2021-08-06 14:59:28,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 14:59:28,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:28,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 14:59:28,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:59:28,720 INFO L87 Difference]: Start difference. First operand 1582 states and 3828 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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) [2021-08-06 14:59:30,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:30,932 INFO L93 Difference]: Finished difference Result 5993 states and 13242 transitions. [2021-08-06 14:59:30,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-06 14:59:30,933 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 14:59:30,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:30,941 INFO L225 Difference]: With dead ends: 5993 [2021-08-06 14:59:30,941 INFO L226 Difference]: Without dead ends: 5708 [2021-08-06 14:59:30,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3830 ImplicationChecksByTransitivity, 1911.9ms TimeCoverageRelationStatistics Valid=2308, Invalid=9248, Unknown=0, NotChecked=0, Total=11556 [2021-08-06 14:59:30,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5708 states. [2021-08-06 14:59:30,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5708 to 1758. [2021-08-06 14:59:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 2.363118952760387) internal successors, (4152), 1757 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:30,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 4152 transitions. [2021-08-06 14:59:30,991 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 4152 transitions. Word has length 39 [2021-08-06 14:59:30,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:30,991 INFO L470 AbstractCegarLoop]: Abstraction has 1758 states and 4152 transitions. [2021-08-06 14:59:30,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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) [2021-08-06 14:59:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 4152 transitions. [2021-08-06 14:59:30,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 14:59:30,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:30,994 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:31,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-06 14:59:31,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 14:59:31,209 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:31,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1853554639, now seen corresponding path program 39 times [2021-08-06 14:59:31,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:31,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503487060] [2021-08-06 14:59:31,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:31,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:31,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:31,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503487060] [2021-08-06 14:59:31,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503487060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:31,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289319705] [2021-08-06 14:59:31,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:59:31,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:31,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:31,383 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:59:31,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 14:59:32,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 14:59:32,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:32,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 14:59:32,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:33,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289319705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:33,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:33,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 28 [2021-08-06 14:59:33,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817022123] [2021-08-06 14:59:33,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 14:59:33,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:33,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 14:59:33,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:59:33,488 INFO L87 Difference]: Start difference. First operand 1758 states and 4152 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:36,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:36,047 INFO L93 Difference]: Finished difference Result 3958 states and 8761 transitions. [2021-08-06 14:59:36,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-06 14:59:36,047 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 14:59:36,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:36,054 INFO L225 Difference]: With dead ends: 3958 [2021-08-06 14:59:36,054 INFO L226 Difference]: Without dead ends: 3954 [2021-08-06 14:59:36,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5275 ImplicationChecksByTransitivity, 2343.7ms TimeCoverageRelationStatistics Valid=3131, Invalid=11149, Unknown=0, NotChecked=0, Total=14280 [2021-08-06 14:59:36,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2021-08-06 14:59:36,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 1848. [2021-08-06 14:59:36,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 2.3892799133730374) internal successors, (4413), 1847 states have internal predecessors, (4413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:36,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 4413 transitions. [2021-08-06 14:59:36,092 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 4413 transitions. Word has length 39 [2021-08-06 14:59:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:36,093 INFO L470 AbstractCegarLoop]: Abstraction has 1848 states and 4413 transitions. [2021-08-06 14:59:36,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 4413 transitions. [2021-08-06 14:59:36,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:59:36,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:36,095 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:36,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:36,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:36,309 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:36,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:36,309 INFO L82 PathProgramCache]: Analyzing trace with hash 443644495, now seen corresponding path program 40 times [2021-08-06 14:59:36,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:36,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259648858] [2021-08-06 14:59:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:36,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:36,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:36,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259648858] [2021-08-06 14:59:36,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259648858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:36,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683829895] [2021-08-06 14:59:36,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:59:36,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:36,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:36,537 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:59:36,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 14:59:37,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:59:37,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:37,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 14:59:37,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:38,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683829895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:38,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:38,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-08-06 14:59:38,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796959376] [2021-08-06 14:59:38,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 14:59:38,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:38,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 14:59:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:59:38,768 INFO L87 Difference]: Start difference. First operand 1848 states and 4413 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 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) [2021-08-06 14:59:41,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:41,004 INFO L93 Difference]: Finished difference Result 3141 states and 7013 transitions. [2021-08-06 14:59:41,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-06 14:59:41,005 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 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 [2021-08-06 14:59:41,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:41,008 INFO L225 Difference]: With dead ends: 3141 [2021-08-06 14:59:41,008 INFO L226 Difference]: Without dead ends: 2979 [2021-08-06 14:59:41,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4141 ImplicationChecksByTransitivity, 1994.0ms TimeCoverageRelationStatistics Valid=3335, Invalid=9547, Unknown=0, NotChecked=0, Total=12882 [2021-08-06 14:59:41,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2979 states. [2021-08-06 14:59:41,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2979 to 1787. [2021-08-06 14:59:41,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.379619260918253) internal successors, (4250), 1786 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:41,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 4250 transitions. [2021-08-06 14:59:41,035 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 4250 transitions. Word has length 41 [2021-08-06 14:59:41,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:41,035 INFO L470 AbstractCegarLoop]: Abstraction has 1787 states and 4250 transitions. [2021-08-06 14:59:41,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 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) [2021-08-06 14:59:41,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 4250 transitions. [2021-08-06 14:59:41,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:59:41,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:41,038 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:41,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:41,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-06 14:59:41,263 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:41,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:41,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1834803435, now seen corresponding path program 41 times [2021-08-06 14:59:41,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:41,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875102979] [2021-08-06 14:59:41,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:41,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:41,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:41,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875102979] [2021-08-06 14:59:41,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875102979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:41,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183939820] [2021-08-06 14:59:41,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:59:41,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:41,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:41,407 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:59:41,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 14:59:42,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-06 14:59:42,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:42,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:59:42,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:43,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183939820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:43,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:43,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-08-06 14:59:43,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882024821] [2021-08-06 14:59:43,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 14:59:43,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:43,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 14:59:43,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:59:43,663 INFO L87 Difference]: Start difference. First operand 1787 states and 4250 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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) [2021-08-06 14:59:47,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:47,053 INFO L93 Difference]: Finished difference Result 2544 states and 5728 transitions. [2021-08-06 14:59:47,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-08-06 14:59:47,054 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 [2021-08-06 14:59:47,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:47,057 INFO L225 Difference]: With dead ends: 2544 [2021-08-06 14:59:47,057 INFO L226 Difference]: Without dead ends: 2540 [2021-08-06 14:59:47,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8547 ImplicationChecksByTransitivity, 3104.4ms TimeCoverageRelationStatistics Valid=4969, Invalid=16787, Unknown=0, NotChecked=0, Total=21756 [2021-08-06 14:59:47,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2021-08-06 14:59:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 1763. [2021-08-06 14:59:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 2.38422247446084) internal successors, (4201), 1762 states have internal predecessors, (4201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:47,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 4201 transitions. [2021-08-06 14:59:47,078 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 4201 transitions. Word has length 41 [2021-08-06 14:59:47,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:47,078 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 4201 transitions. [2021-08-06 14:59:47,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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) [2021-08-06 14:59:47,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 4201 transitions. [2021-08-06 14:59:47,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 14:59:47,081 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:47,081 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:47,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-06 14:59:47,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:47,282 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:47,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:47,282 INFO L82 PathProgramCache]: Analyzing trace with hash 217373005, now seen corresponding path program 42 times [2021-08-06 14:59:47,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:47,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489828925] [2021-08-06 14:59:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:47,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:47,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:47,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489828925] [2021-08-06 14:59:47,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489828925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:47,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495362261] [2021-08-06 14:59:47,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:59:47,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:47,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:47,468 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:59:47,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 14:59:48,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 14:59:48,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:59:48,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:49,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495362261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:49,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:49,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2021-08-06 14:59:49,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364779804] [2021-08-06 14:59:49,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:59:49,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:49,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:59:49,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:59:49,437 INFO L87 Difference]: Start difference. First operand 1763 states and 4201 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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) [2021-08-06 14:59:49,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:49,603 INFO L93 Difference]: Finished difference Result 2522 states and 5899 transitions. [2021-08-06 14:59:49,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:59:49,603 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 14:59:49,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:49,607 INFO L225 Difference]: With dead ends: 2522 [2021-08-06 14:59:49,607 INFO L226 Difference]: Without dead ends: 2459 [2021-08-06 14:59:49,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:59:49,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-08-06 14:59:49,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2136. [2021-08-06 14:59:49,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 2.419672131147541) internal successors, (5166), 2135 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 5166 transitions. [2021-08-06 14:59:49,634 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 5166 transitions. Word has length 43 [2021-08-06 14:59:49,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:49,634 INFO L470 AbstractCegarLoop]: Abstraction has 2136 states and 5166 transitions. [2021-08-06 14:59:49,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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) [2021-08-06 14:59:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 5166 transitions. [2021-08-06 14:59:49,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 14:59:49,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:49,638 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:49,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:49,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:49,849 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:49,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:49,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1423537757, now seen corresponding path program 43 times [2021-08-06 14:59:49,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:49,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470472146] [2021-08-06 14:59:49,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:49,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:50,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:50,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470472146] [2021-08-06 14:59:50,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470472146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:50,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140178695] [2021-08-06 14:59:50,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:59:50,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:50,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:50,156 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:59:50,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 14:59:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:51,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 14:59:51,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:52,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140178695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:52,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:52,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-08-06 14:59:52,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334446994] [2021-08-06 14:59:52,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 14:59:52,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:52,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 14:59:52,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:59:52,570 INFO L87 Difference]: Start difference. First operand 2136 states and 5166 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:55,845 INFO L93 Difference]: Finished difference Result 5022 states and 11126 transitions. [2021-08-06 14:59:55,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-06 14:59:55,845 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 14:59:55,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:55,851 INFO L225 Difference]: With dead ends: 5022 [2021-08-06 14:59:55,852 INFO L226 Difference]: Without dead ends: 4989 [2021-08-06 14:59:55,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3891 ImplicationChecksByTransitivity, 2248.8ms TimeCoverageRelationStatistics Valid=1461, Invalid=10971, Unknown=0, NotChecked=0, Total=12432 [2021-08-06 14:59:55,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4989 states. [2021-08-06 14:59:55,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4989 to 2409. [2021-08-06 14:59:55,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 2.4210963455149503) internal successors, (5830), 2408 states have internal predecessors, (5830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 5830 transitions. [2021-08-06 14:59:55,886 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 5830 transitions. Word has length 43 [2021-08-06 14:59:55,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:55,886 INFO L470 AbstractCegarLoop]: Abstraction has 2409 states and 5830 transitions. [2021-08-06 14:59:55,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:55,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 5830 transitions. [2021-08-06 14:59:55,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 14:59:55,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:55,890 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:55,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:56,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-06 14:59:56,103 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:56,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:56,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2141063629, now seen corresponding path program 44 times [2021-08-06 14:59:56,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:56,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235814497] [2021-08-06 14:59:56,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:56,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:56,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:56,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235814497] [2021-08-06 14:59:56,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235814497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:56,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640840289] [2021-08-06 14:59:56,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:59:56,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:56,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:56,363 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:59:56,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 14:59:57,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:59:57,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:57,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 14:59:57,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:58,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640840289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:58,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:58,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2021-08-06 14:59:58,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066168262] [2021-08-06 14:59:58,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 14:59:58,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:58,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 14:59:58,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:59:58,842 INFO L87 Difference]: Start difference. First operand 2409 states and 5830 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 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) [2021-08-06 15:00:01,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:01,464 INFO L93 Difference]: Finished difference Result 4003 states and 9095 transitions. [2021-08-06 15:00:01,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-06 15:00:01,465 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 15:00:01,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:01,469 INFO L225 Difference]: With dead ends: 4003 [2021-08-06 15:00:01,469 INFO L226 Difference]: Without dead ends: 3999 [2021-08-06 15:00:01,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2728 ImplicationChecksByTransitivity, 1975.4ms TimeCoverageRelationStatistics Valid=1085, Invalid=8227, Unknown=0, NotChecked=0, Total=9312 [2021-08-06 15:00:01,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2021-08-06 15:00:01,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 2199. [2021-08-06 15:00:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 2.4140127388535033) internal successors, (5306), 2198 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:01,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 5306 transitions. [2021-08-06 15:00:01,498 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 5306 transitions. Word has length 43 [2021-08-06 15:00:01,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:01,498 INFO L470 AbstractCegarLoop]: Abstraction has 2199 states and 5306 transitions. [2021-08-06 15:00:01,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 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) [2021-08-06 15:00:01,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 5306 transitions. [2021-08-06 15:00:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 15:00:01,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:01,502 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:01,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 15:00:01,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-06 15:00:01,710 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:01,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:01,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1436059687, now seen corresponding path program 45 times [2021-08-06 15:00:01,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:01,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100336768] [2021-08-06 15:00:01,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:01,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:01,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:01,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100336768] [2021-08-06 15:00:01,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100336768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:01,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736896086] [2021-08-06 15:00:01,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:00:01,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:01,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:01,999 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:00:02,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 15:00:03,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-06 15:00:03,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:03,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 15:00:03,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:04,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736896086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:04,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:04,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-08-06 15:00:04,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854820330] [2021-08-06 15:00:04,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 15:00:04,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:04,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 15:00:04,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:00:04,605 INFO L87 Difference]: Start difference. First operand 2199 states and 5306 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:08,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:08,124 INFO L93 Difference]: Finished difference Result 5834 states and 12841 transitions. [2021-08-06 15:00:08,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-08-06 15:00:08,124 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 15:00:08,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:08,133 INFO L225 Difference]: With dead ends: 5834 [2021-08-06 15:00:08,133 INFO L226 Difference]: Without dead ends: 5786 [2021-08-06 15:00:08,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5467 ImplicationChecksByTransitivity, 2601.4ms TimeCoverageRelationStatistics Valid=2247, Invalid=14009, Unknown=0, NotChecked=0, Total=16256 [2021-08-06 15:00:08,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-08-06 15:00:08,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 2287. [2021-08-06 15:00:08,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2286 states have (on average 2.400262467191601) internal successors, (5487), 2286 states have internal predecessors, (5487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 5487 transitions. [2021-08-06 15:00:08,192 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 5487 transitions. Word has length 43 [2021-08-06 15:00:08,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:08,192 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 5487 transitions. [2021-08-06 15:00:08,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:08,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 5487 transitions. [2021-08-06 15:00:08,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 15:00:08,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:08,195 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:08,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-06 15:00:08,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 15:00:08,395 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:08,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:08,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1891175509, now seen corresponding path program 46 times [2021-08-06 15:00:08,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:08,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637712108] [2021-08-06 15:00:08,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:08,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:08,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:08,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637712108] [2021-08-06 15:00:08,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637712108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:08,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740077996] [2021-08-06 15:00:08,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:00:08,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:08,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:08,653 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:00:08,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 15:00:10,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:00:10,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:10,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 15:00:10,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:11,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740077996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:11,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:11,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-08-06 15:00:11,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54094547] [2021-08-06 15:00:11,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 15:00:11,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:11,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 15:00:11,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:00:11,342 INFO L87 Difference]: Start difference. First operand 2287 states and 5487 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:14,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:14,225 INFO L93 Difference]: Finished difference Result 7592 states and 16612 transitions. [2021-08-06 15:00:14,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-08-06 15:00:14,226 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 15:00:14,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:14,235 INFO L225 Difference]: With dead ends: 7592 [2021-08-06 15:00:14,235 INFO L226 Difference]: Without dead ends: 7418 [2021-08-06 15:00:14,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5141 ImplicationChecksByTransitivity, 2453.0ms TimeCoverageRelationStatistics Valid=2370, Invalid=12636, Unknown=0, NotChecked=0, Total=15006 [2021-08-06 15:00:14,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7418 states. [2021-08-06 15:00:14,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7418 to 2165. [2021-08-06 15:00:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2164 states have (on average 2.4172828096118297) internal successors, (5231), 2164 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 5231 transitions. [2021-08-06 15:00:14,279 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 5231 transitions. Word has length 43 [2021-08-06 15:00:14,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:14,279 INFO L470 AbstractCegarLoop]: Abstraction has 2165 states and 5231 transitions. [2021-08-06 15:00:14,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 5231 transitions. [2021-08-06 15:00:14,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 15:00:14,282 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:14,282 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:14,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 15:00:14,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:14,496 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:14,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:14,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1382314961, now seen corresponding path program 47 times [2021-08-06 15:00:14,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:14,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084712970] [2021-08-06 15:00:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:14,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:14,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:14,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084712970] [2021-08-06 15:00:14,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084712970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:14,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473393107] [2021-08-06 15:00:14,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:00:14,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:14,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:14,793 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:00:14,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 15:00:16,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 15:00:16,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:16,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 15:00:16,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:17,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473393107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:17,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:17,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-08-06 15:00:17,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101906708] [2021-08-06 15:00:17,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 15:00:17,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:17,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 15:00:17,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:00:17,488 INFO L87 Difference]: Start difference. First operand 2165 states and 5231 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:20,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:20,267 INFO L93 Difference]: Finished difference Result 8056 states and 17505 transitions. [2021-08-06 15:00:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-08-06 15:00:20,267 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 15:00:20,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:20,277 INFO L225 Difference]: With dead ends: 8056 [2021-08-06 15:00:20,277 INFO L226 Difference]: Without dead ends: 7852 [2021-08-06 15:00:20,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5520 ImplicationChecksByTransitivity, 2340.4ms TimeCoverageRelationStatistics Valid=2778, Invalid=12474, Unknown=0, NotChecked=0, Total=15252 [2021-08-06 15:00:20,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7852 states. [2021-08-06 15:00:20,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7852 to 2181. [2021-08-06 15:00:20,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 2.4142201834862385) internal successors, (5263), 2180 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 5263 transitions. [2021-08-06 15:00:20,325 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 5263 transitions. Word has length 43 [2021-08-06 15:00:20,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:20,325 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 5263 transitions. [2021-08-06 15:00:20,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:20,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 5263 transitions. [2021-08-06 15:00:20,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 15:00:20,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:20,327 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:20,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-06 15:00:20,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-06 15:00:20,533 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:20,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:20,533 INFO L82 PathProgramCache]: Analyzing trace with hash -2112876109, now seen corresponding path program 48 times [2021-08-06 15:00:20,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:20,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822640191] [2021-08-06 15:00:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:20,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:20,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:20,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822640191] [2021-08-06 15:00:20,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822640191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:20,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760801069] [2021-08-06 15:00:20,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:00:20,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:20,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:20,823 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:00:20,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 15:00:22,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 15:00:22,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:22,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 15:00:22,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:23,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760801069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:23,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:23,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-06 15:00:23,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297210688] [2021-08-06 15:00:23,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 15:00:23,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:23,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 15:00:23,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:00:23,622 INFO L87 Difference]: Start difference. First operand 2181 states and 5263 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:26,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:26,543 INFO L93 Difference]: Finished difference Result 8331 states and 18384 transitions. [2021-08-06 15:00:26,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-08-06 15:00:26,544 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 15:00:26,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:26,554 INFO L225 Difference]: With dead ends: 8331 [2021-08-06 15:00:26,554 INFO L226 Difference]: Without dead ends: 7923 [2021-08-06 15:00:26,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5800 ImplicationChecksByTransitivity, 2585.3ms TimeCoverageRelationStatistics Valid=3419, Invalid=13611, Unknown=0, NotChecked=0, Total=17030 [2021-08-06 15:00:26,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7923 states. [2021-08-06 15:00:26,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7923 to 2201. [2021-08-06 15:00:26,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.3536363636363635) internal successors, (5178), 2200 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 5178 transitions. [2021-08-06 15:00:26,659 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 5178 transitions. Word has length 43 [2021-08-06 15:00:26,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:26,659 INFO L470 AbstractCegarLoop]: Abstraction has 2201 states and 5178 transitions. [2021-08-06 15:00:26,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 5178 transitions. [2021-08-06 15:00:26,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 15:00:26,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:26,662 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:26,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 15:00:26,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 15:00:26,877 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:26,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:26,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1531415989, now seen corresponding path program 49 times [2021-08-06 15:00:26,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:26,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021739419] [2021-08-06 15:00:26,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:26,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:27,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:27,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021739419] [2021-08-06 15:00:27,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021739419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:27,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25596382] [2021-08-06 15:00:27,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:00:27,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:27,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:27,057 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:00:27,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 15:00:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:28,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:00:28,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:29,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25596382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:29,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:29,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2021-08-06 15:00:29,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563985215] [2021-08-06 15:00:29,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:00:29,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:29,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:00:29,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:00:29,924 INFO L87 Difference]: Start difference. First operand 2201 states and 5178 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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) [2021-08-06 15:00:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:33,656 INFO L93 Difference]: Finished difference Result 4987 states and 10986 transitions. [2021-08-06 15:00:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-08-06 15:00:33,657 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 15:00:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:33,665 INFO L225 Difference]: With dead ends: 4987 [2021-08-06 15:00:33,665 INFO L226 Difference]: Without dead ends: 4983 [2021-08-06 15:00:33,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9023 ImplicationChecksByTransitivity, 3390.2ms TimeCoverageRelationStatistics Valid=4987, Invalid=17965, Unknown=0, NotChecked=0, Total=22952 [2021-08-06 15:00:33,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4983 states. [2021-08-06 15:00:33,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4983 to 2275. [2021-08-06 15:00:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 2.3790677220756375) internal successors, (5410), 2274 states have internal predecessors, (5410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:33,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 5410 transitions. [2021-08-06 15:00:33,713 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 5410 transitions. Word has length 43 [2021-08-06 15:00:33,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:33,713 INFO L470 AbstractCegarLoop]: Abstraction has 2275 states and 5410 transitions. [2021-08-06 15:00:33,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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) [2021-08-06 15:00:33,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 5410 transitions. [2021-08-06 15:00:33,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 15:00:33,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:33,717 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:33,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 15:00:33,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:33,933 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:33,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:33,933 INFO L82 PathProgramCache]: Analyzing trace with hash 289457547, now seen corresponding path program 50 times [2021-08-06 15:00:33,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:33,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449978110] [2021-08-06 15:00:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:33,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:34,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:34,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449978110] [2021-08-06 15:00:34,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449978110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:34,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322430616] [2021-08-06 15:00:34,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:00:34,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:34,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:34,210 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:00:34,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 15:00:36,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:00:36,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:36,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:00:36,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:37,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322430616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:37,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:37,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-08-06 15:00:37,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155342044] [2021-08-06 15:00:37,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-06 15:00:37,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:37,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-06 15:00:37,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:00:37,081 INFO L87 Difference]: Start difference. First operand 2275 states and 5410 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:40,063 INFO L93 Difference]: Finished difference Result 3592 states and 7941 transitions. [2021-08-06 15:00:40,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-08-06 15:00:40,064 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 15:00:40,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:40,069 INFO L225 Difference]: With dead ends: 3592 [2021-08-06 15:00:40,069 INFO L226 Difference]: Without dead ends: 3394 [2021-08-06 15:00:40,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6324 ImplicationChecksByTransitivity, 2779.4ms TimeCoverageRelationStatistics Valid=4840, Invalid=13792, Unknown=0, NotChecked=0, Total=18632 [2021-08-06 15:00:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3394 states. [2021-08-06 15:00:40,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3394 to 2278. [2021-08-06 15:00:40,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 2.3737373737373737) internal successors, (5405), 2277 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:40,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 5405 transitions. [2021-08-06 15:00:40,098 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 5405 transitions. Word has length 45 [2021-08-06 15:00:40,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:40,098 INFO L470 AbstractCegarLoop]: Abstraction has 2278 states and 5405 transitions. [2021-08-06 15:00:40,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:40,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 5405 transitions. [2021-08-06 15:00:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 15:00:40,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:40,100 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:40,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 15:00:40,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-06 15:00:40,301 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:40,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:40,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2075959915, now seen corresponding path program 51 times [2021-08-06 15:00:40,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:40,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018952702] [2021-08-06 15:00:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:40,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:40,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:40,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018952702] [2021-08-06 15:00:40,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018952702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:40,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010828626] [2021-08-06 15:00:40,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:00:40,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:40,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:40,472 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:00:40,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 15:00:42,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-06 15:00:42,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:42,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 15:00:42,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:43,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010828626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:43,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:43,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21] total 31 [2021-08-06 15:00:43,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180146968] [2021-08-06 15:00:43,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:00:43,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:43,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:00:43,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:00:43,459 INFO L87 Difference]: Start difference. First operand 2278 states and 5405 transitions. Second operand has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:48,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:48,310 INFO L93 Difference]: Finished difference Result 3261 states and 7331 transitions. [2021-08-06 15:00:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-08-06 15:00:48,310 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:00:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:48,314 INFO L225 Difference]: With dead ends: 3261 [2021-08-06 15:00:48,314 INFO L226 Difference]: Without dead ends: 3257 [2021-08-06 15:00:48,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14117 ImplicationChecksByTransitivity, 4489.6ms TimeCoverageRelationStatistics Valid=7581, Invalid=26459, Unknown=0, NotChecked=0, Total=34040 [2021-08-06 15:00:48,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2021-08-06 15:00:48,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 2250. [2021-08-06 15:00:48,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 2249 states have (on average 2.377945753668297) internal successors, (5348), 2249 states have internal predecessors, (5348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 5348 transitions. [2021-08-06 15:00:48,341 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 5348 transitions. Word has length 45 [2021-08-06 15:00:48,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:48,341 INFO L470 AbstractCegarLoop]: Abstraction has 2250 states and 5348 transitions. [2021-08-06 15:00:48,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:48,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 5348 transitions. [2021-08-06 15:00:48,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 15:00:48,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:48,343 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:48,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 15:00:48,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:48,544 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:48,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:48,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1866568223, now seen corresponding path program 52 times [2021-08-06 15:00:48,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:48,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295479961] [2021-08-06 15:00:48,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:48,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:00:48,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:48,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295479961] [2021-08-06 15:00:48,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295479961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:48,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077221730] [2021-08-06 15:00:48,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:00:48,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:48,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:48,729 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:00:48,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 15:00:50,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:00:50,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:50,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 15:00:50,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:51,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077221730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:51,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:51,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2021-08-06 15:00:51,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464144791] [2021-08-06 15:00:51,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:00:51,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:51,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:00:51,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:00:51,712 INFO L87 Difference]: Start difference. First operand 2250 states and 5348 transitions. Second operand has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:53,609 INFO L93 Difference]: Finished difference Result 4598 states and 10315 transitions. [2021-08-06 15:00:53,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 15:00:53,609 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 15:00:53,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:53,616 INFO L225 Difference]: With dead ends: 4598 [2021-08-06 15:00:53,616 INFO L226 Difference]: Without dead ends: 4589 [2021-08-06 15:00:53,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 1541.1ms TimeCoverageRelationStatistics Valid=1438, Invalid=6394, Unknown=0, NotChecked=0, Total=7832 [2021-08-06 15:00:53,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-08-06 15:00:53,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 2962. [2021-08-06 15:00:53,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2961 states have (on average 2.403917595406957) internal successors, (7118), 2961 states have internal predecessors, (7118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 7118 transitions. [2021-08-06 15:00:53,657 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 7118 transitions. Word has length 45 [2021-08-06 15:00:53,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:53,657 INFO L470 AbstractCegarLoop]: Abstraction has 2962 states and 7118 transitions. [2021-08-06 15:00:53,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:53,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 7118 transitions. [2021-08-06 15:00:53,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 15:00:53,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:53,661 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:53,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 15:00:53,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-06 15:00:53,861 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:53,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:53,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1927395959, now seen corresponding path program 53 times [2021-08-06 15:00:53,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:53,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256407975] [2021-08-06 15:00:53,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:53,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 1 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:54,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:54,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256407975] [2021-08-06 15:00:54,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256407975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:54,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789702167] [2021-08-06 15:00:54,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:00:54,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:54,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:54,041 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:00:54,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 15:00:56,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-06 15:00:56,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:56,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 15:00:56,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:56,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789702167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:56,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:56,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 15:00:56,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349757665] [2021-08-06 15:00:56,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:00:56,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:56,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:00:56,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:00:56,536 INFO L87 Difference]: Start difference. First operand 2962 states and 7118 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 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) [2021-08-06 15:00:56,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:56,663 INFO L93 Difference]: Finished difference Result 3983 states and 9483 transitions. [2021-08-06 15:00:56,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:00:56,663 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 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 47 [2021-08-06 15:00:56,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:56,668 INFO L225 Difference]: With dead ends: 3983 [2021-08-06 15:00:56,668 INFO L226 Difference]: Without dead ends: 3920 [2021-08-06 15:00:56,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:00:56,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2021-08-06 15:00:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 3633. [2021-08-06 15:00:56,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3633 states, 3632 states have (on average 2.4430066079295156) internal successors, (8873), 3632 states have internal predecessors, (8873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 8873 transitions. [2021-08-06 15:00:56,719 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 8873 transitions. Word has length 47 [2021-08-06 15:00:56,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:56,720 INFO L470 AbstractCegarLoop]: Abstraction has 3633 states and 8873 transitions. [2021-08-06 15:00:56,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 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) [2021-08-06 15:00:56,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 8873 transitions. [2021-08-06 15:00:56,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 15:00:56,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:56,723 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:56,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 15:00:56,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-06 15:00:56,924 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:56,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:56,924 INFO L82 PathProgramCache]: Analyzing trace with hash -129322871, now seen corresponding path program 54 times [2021-08-06 15:00:56,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:56,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852936940] [2021-08-06 15:00:56,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:56,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:57,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:57,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852936940] [2021-08-06 15:00:57,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852936940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:57,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292954011] [2021-08-06 15:00:57,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:00:57,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:57,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:57,224 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:00:57,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 15:00:59,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-06 15:00:59,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:59,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:00:59,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:00,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292954011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:00,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:00,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 35 [2021-08-06 15:01:00,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167976035] [2021-08-06 15:01:00,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 15:01:00,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:00,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 15:01:00,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:01:00,529 INFO L87 Difference]: Start difference. First operand 3633 states and 8873 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:04,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:04,626 INFO L93 Difference]: Finished difference Result 5683 states and 13165 transitions. [2021-08-06 15:01:04,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-06 15:01:04,626 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 15:01:04,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:04,633 INFO L225 Difference]: With dead ends: 5683 [2021-08-06 15:01:04,633 INFO L226 Difference]: Without dead ends: 5679 [2021-08-06 15:01:04,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3956 ImplicationChecksByTransitivity, 2613.4ms TimeCoverageRelationStatistics Valid=1385, Invalid=11725, Unknown=0, NotChecked=0, Total=13110 [2021-08-06 15:01:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5679 states. [2021-08-06 15:01:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5679 to 3861. [2021-08-06 15:01:04,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3861 states, 3860 states have (on average 2.45699481865285) internal successors, (9484), 3860 states have internal predecessors, (9484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3861 states to 3861 states and 9484 transitions. [2021-08-06 15:01:04,687 INFO L78 Accepts]: Start accepts. Automaton has 3861 states and 9484 transitions. Word has length 47 [2021-08-06 15:01:04,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:04,687 INFO L470 AbstractCegarLoop]: Abstraction has 3861 states and 9484 transitions. [2021-08-06 15:01:04,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:04,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3861 states and 9484 transitions. [2021-08-06 15:01:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 15:01:04,693 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:04,693 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:04,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 15:01:04,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:04,895 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:04,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:04,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1914879715, now seen corresponding path program 55 times [2021-08-06 15:01:04,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:04,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949790793] [2021-08-06 15:01:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:04,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:05,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:05,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949790793] [2021-08-06 15:01:05,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949790793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:05,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364868279] [2021-08-06 15:01:05,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:01:05,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:05,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:05,281 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:01:05,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 15:01:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:07,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:01:07,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:08,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364868279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:08,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:08,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-08-06 15:01:08,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498870663] [2021-08-06 15:01:08,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 15:01:08,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:08,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 15:01:08,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:01:08,589 INFO L87 Difference]: Start difference. First operand 3861 states and 9484 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:13,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:13,678 INFO L93 Difference]: Finished difference Result 8575 states and 19366 transitions. [2021-08-06 15:01:13,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-08-06 15:01:13,678 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 15:01:13,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:13,689 INFO L225 Difference]: With dead ends: 8575 [2021-08-06 15:01:13,689 INFO L226 Difference]: Without dead ends: 8527 [2021-08-06 15:01:13,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7798 ImplicationChecksByTransitivity, 3499.2ms TimeCoverageRelationStatistics Valid=2779, Invalid=19871, Unknown=0, NotChecked=0, Total=22650 [2021-08-06 15:01:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8527 states. [2021-08-06 15:01:13,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8527 to 3510. [2021-08-06 15:01:13,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3510 states, 3509 states have (on average 2.450555713878598) internal successors, (8599), 3509 states have internal predecessors, (8599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3510 states to 3510 states and 8599 transitions. [2021-08-06 15:01:13,754 INFO L78 Accepts]: Start accepts. Automaton has 3510 states and 8599 transitions. Word has length 47 [2021-08-06 15:01:13,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:13,754 INFO L470 AbstractCegarLoop]: Abstraction has 3510 states and 8599 transitions. [2021-08-06 15:01:13,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:13,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3510 states and 8599 transitions. [2021-08-06 15:01:13,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 15:01:13,757 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:13,758 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:13,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 15:01:13,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:13,958 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:13,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:13,958 INFO L82 PathProgramCache]: Analyzing trace with hash -829769113, now seen corresponding path program 56 times [2021-08-06 15:01:13,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:13,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728183356] [2021-08-06 15:01:13,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:13,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:14,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:14,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728183356] [2021-08-06 15:01:14,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728183356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:14,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92020525] [2021-08-06 15:01:14,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:01:14,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:14,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:14,249 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:01:14,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 15:01:16,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:01:16,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:16,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 15:01:16,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:17,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92020525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:17,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:17,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-08-06 15:01:17,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422570435] [2021-08-06 15:01:17,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 15:01:17,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:17,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 15:01:17,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:01:17,591 INFO L87 Difference]: Start difference. First operand 3510 states and 8599 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:21,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:21,531 INFO L93 Difference]: Finished difference Result 10171 states and 22757 transitions. [2021-08-06 15:01:21,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-08-06 15:01:21,532 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 15:01:21,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:21,546 INFO L225 Difference]: With dead ends: 10171 [2021-08-06 15:01:21,546 INFO L226 Difference]: Without dead ends: 10093 [2021-08-06 15:01:21,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7975 ImplicationChecksByTransitivity, 3062.6ms TimeCoverageRelationStatistics Valid=3216, Invalid=19434, Unknown=0, NotChecked=0, Total=22650 [2021-08-06 15:01:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10093 states. [2021-08-06 15:01:21,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10093 to 3623. [2021-08-06 15:01:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 2.4577581446714523) internal successors, (8902), 3622 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 8902 transitions. [2021-08-06 15:01:21,622 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 8902 transitions. Word has length 47 [2021-08-06 15:01:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:21,622 INFO L470 AbstractCegarLoop]: Abstraction has 3623 states and 8902 transitions. [2021-08-06 15:01:21,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 8902 transitions. [2021-08-06 15:01:21,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 15:01:21,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:21,627 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:21,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 15:01:21,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:21,840 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:21,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:21,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1198842603, now seen corresponding path program 57 times [2021-08-06 15:01:21,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:21,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277567548] [2021-08-06 15:01:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:21,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:22,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:22,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277567548] [2021-08-06 15:01:22,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277567548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:22,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840765505] [2021-08-06 15:01:22,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:01:22,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:22,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:22,159 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:01:22,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 15:01:24,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-06 15:01:24,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:24,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 15:01:24,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:25,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840765505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:25,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:25,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-08-06 15:01:25,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105031120] [2021-08-06 15:01:25,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-06 15:01:25,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:25,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-06 15:01:25,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:01:25,533 INFO L87 Difference]: Start difference. First operand 3623 states and 8902 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:28,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:28,743 INFO L93 Difference]: Finished difference Result 11503 states and 25462 transitions. [2021-08-06 15:01:28,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-08-06 15:01:28,744 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 15:01:28,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:28,760 INFO L225 Difference]: With dead ends: 11503 [2021-08-06 15:01:28,760 INFO L226 Difference]: Without dead ends: 11311 [2021-08-06 15:01:28,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5632 ImplicationChecksByTransitivity, 2508.2ms TimeCoverageRelationStatistics Valid=2609, Invalid=13647, Unknown=0, NotChecked=0, Total=16256 [2021-08-06 15:01:28,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11311 states. [2021-08-06 15:01:28,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11311 to 3647. [2021-08-06 15:01:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3647 states, 3646 states have (on average 2.4547449259462426) internal successors, (8950), 3646 states have internal predecessors, (8950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3647 states to 3647 states and 8950 transitions. [2021-08-06 15:01:28,844 INFO L78 Accepts]: Start accepts. Automaton has 3647 states and 8950 transitions. Word has length 47 [2021-08-06 15:01:28,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:28,844 INFO L470 AbstractCegarLoop]: Abstraction has 3647 states and 8950 transitions. [2021-08-06 15:01:28,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3647 states and 8950 transitions. [2021-08-06 15:01:28,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 15:01:28,848 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:28,849 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:28,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-06 15:01:29,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-06 15:01:29,050 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:29,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:29,050 INFO L82 PathProgramCache]: Analyzing trace with hash 660273263, now seen corresponding path program 58 times [2021-08-06 15:01:29,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:29,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309952528] [2021-08-06 15:01:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:29,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:29,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:29,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309952528] [2021-08-06 15:01:29,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309952528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:29,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143217296] [2021-08-06 15:01:29,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:01:29,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:29,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:29,348 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:01:29,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 15:01:31,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:01:31,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:31,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 15:01:31,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:32,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143217296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:32,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:32,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2021-08-06 15:01:32,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606575789] [2021-08-06 15:01:32,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-06 15:01:32,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:32,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-06 15:01:32,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:01:32,838 INFO L87 Difference]: Start difference. First operand 3647 states and 8950 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:36,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:36,462 INFO L93 Difference]: Finished difference Result 11968 states and 26283 transitions. [2021-08-06 15:01:36,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-08-06 15:01:36,462 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 15:01:36,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:36,497 INFO L225 Difference]: With dead ends: 11968 [2021-08-06 15:01:36,497 INFO L226 Difference]: Without dead ends: 11623 [2021-08-06 15:01:36,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8211 ImplicationChecksByTransitivity, 3055.7ms TimeCoverageRelationStatistics Valid=4142, Invalid=18208, Unknown=0, NotChecked=0, Total=22350 [2021-08-06 15:01:36,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11623 states. [2021-08-06 15:01:36,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11623 to 3663. [2021-08-06 15:01:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.452758055707264) internal successors, (8982), 3662 states have internal predecessors, (8982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 8982 transitions. [2021-08-06 15:01:36,578 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 8982 transitions. Word has length 47 [2021-08-06 15:01:36,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:36,578 INFO L470 AbstractCegarLoop]: Abstraction has 3663 states and 8982 transitions. [2021-08-06 15:01:36,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:36,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 8982 transitions. [2021-08-06 15:01:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 15:01:36,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:36,582 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:36,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 15:01:36,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 15:01:36,805 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:36,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:36,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1892072179, now seen corresponding path program 59 times [2021-08-06 15:01:36,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:36,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113145280] [2021-08-06 15:01:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:36,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:37,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:37,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113145280] [2021-08-06 15:01:37,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113145280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:37,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132991707] [2021-08-06 15:01:37,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:01:37,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:37,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:37,098 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:01:37,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 15:01:39,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-06 15:01:39,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:39,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-06 15:01:39,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:40,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132991707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:40,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:40,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-06 15:01:40,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138172172] [2021-08-06 15:01:40,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 15:01:40,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:40,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 15:01:40,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:01:40,485 INFO L87 Difference]: Start difference. First operand 3663 states and 8982 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:44,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:44,138 INFO L93 Difference]: Finished difference Result 10835 states and 24208 transitions. [2021-08-06 15:01:44,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-08-06 15:01:44,138 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 15:01:44,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:44,157 INFO L225 Difference]: With dead ends: 10835 [2021-08-06 15:01:44,157 INFO L226 Difference]: Without dead ends: 10388 [2021-08-06 15:01:44,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8695 ImplicationChecksByTransitivity, 3263.9ms TimeCoverageRelationStatistics Valid=4887, Invalid=19293, Unknown=0, NotChecked=0, Total=24180 [2021-08-06 15:01:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10388 states. [2021-08-06 15:01:44,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10388 to 3976. [2021-08-06 15:01:44,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3976 states, 3975 states have (on average 2.4070440251572327) internal successors, (9568), 3975 states have internal predecessors, (9568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3976 states to 3976 states and 9568 transitions. [2021-08-06 15:01:44,242 INFO L78 Accepts]: Start accepts. Automaton has 3976 states and 9568 transitions. Word has length 47 [2021-08-06 15:01:44,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:44,242 INFO L470 AbstractCegarLoop]: Abstraction has 3976 states and 9568 transitions. [2021-08-06 15:01:44,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:44,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3976 states and 9568 transitions. [2021-08-06 15:01:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 15:01:44,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:44,245 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:44,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-06 15:01:44,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:44,446 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:44,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1055250745, now seen corresponding path program 60 times [2021-08-06 15:01:44,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:44,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038987285] [2021-08-06 15:01:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:44,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:44,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:44,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038987285] [2021-08-06 15:01:44,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038987285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:44,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051518584] [2021-08-06 15:01:44,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:01:44,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:44,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:44,649 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:01:44,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 15:01:47,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-06 15:01:47,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:47,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 15:01:47,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:48,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051518584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:48,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:48,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 34 [2021-08-06 15:01:48,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775561576] [2021-08-06 15:01:48,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 15:01:48,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:48,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 15:01:48,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:01:48,314 INFO L87 Difference]: Start difference. First operand 3976 states and 9568 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:53,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:53,247 INFO L93 Difference]: Finished difference Result 7944 states and 17889 transitions. [2021-08-06 15:01:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-08-06 15:01:53,247 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 15:01:53,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:53,257 INFO L225 Difference]: With dead ends: 7944 [2021-08-06 15:01:53,257 INFO L226 Difference]: Without dead ends: 7940 [2021-08-06 15:01:53,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14541 ImplicationChecksByTransitivity, 4461.8ms TimeCoverageRelationStatistics Valid=7575, Invalid=27581, Unknown=0, NotChecked=0, Total=35156 [2021-08-06 15:01:53,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7940 states. [2021-08-06 15:01:53,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7940 to 4065. [2021-08-06 15:01:53,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4065 states, 4064 states have (on average 2.421998031496063) internal successors, (9843), 4064 states have internal predecessors, (9843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:53,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4065 states to 4065 states and 9843 transitions. [2021-08-06 15:01:53,319 INFO L78 Accepts]: Start accepts. Automaton has 4065 states and 9843 transitions. Word has length 47 [2021-08-06 15:01:53,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:53,319 INFO L470 AbstractCegarLoop]: Abstraction has 4065 states and 9843 transitions. [2021-08-06 15:01:53,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:53,319 INFO L276 IsEmpty]: Start isEmpty. Operand 4065 states and 9843 transitions. [2021-08-06 15:01:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 15:01:53,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:53,323 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:53,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-06 15:01:53,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:53,524 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:53,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:53,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1962795719, now seen corresponding path program 61 times [2021-08-06 15:01:53,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:53,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361772168] [2021-08-06 15:01:53,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:53,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:53,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:53,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361772168] [2021-08-06 15:01:53,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361772168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:53,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334957486] [2021-08-06 15:01:53,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:01:53,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:53,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:53,797 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:01:53,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 15:01:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:56,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 15:01:56,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:57,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334957486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:57,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:57,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-08-06 15:01:57,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043578723] [2021-08-06 15:01:57,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 15:01:57,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:57,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 15:01:57,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1541, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:01:57,376 INFO L87 Difference]: Start difference. First operand 4065 states and 9843 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:01,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:01,092 INFO L93 Difference]: Finished difference Result 6076 states and 13919 transitions. [2021-08-06 15:02:01,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-08-06 15:02:01,092 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 15:02:01,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:01,099 INFO L225 Difference]: With dead ends: 6076 [2021-08-06 15:02:01,099 INFO L226 Difference]: Without dead ends: 5806 [2021-08-06 15:02:01,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9288 ImplicationChecksByTransitivity, 3380.0ms TimeCoverageRelationStatistics Valid=6810, Invalid=19272, Unknown=0, NotChecked=0, Total=26082 [2021-08-06 15:02:01,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5806 states. [2021-08-06 15:02:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5806 to 3976. [2021-08-06 15:02:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3976 states, 3975 states have (on average 2.4171069182389937) internal successors, (9608), 3975 states have internal predecessors, (9608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3976 states to 3976 states and 9608 transitions. [2021-08-06 15:02:01,157 INFO L78 Accepts]: Start accepts. Automaton has 3976 states and 9608 transitions. Word has length 49 [2021-08-06 15:02:01,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:01,158 INFO L470 AbstractCegarLoop]: Abstraction has 3976 states and 9608 transitions. [2021-08-06 15:02:01,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:01,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3976 states and 9608 transitions. [2021-08-06 15:02:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-06 15:02:01,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:01,161 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:01,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 15:02:01,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:01,362 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:01,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:01,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1919003925, now seen corresponding path program 62 times [2021-08-06 15:02:01,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:01,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275644338] [2021-08-06 15:02:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:01,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:01,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:01,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275644338] [2021-08-06 15:02:01,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275644338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:01,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938200365] [2021-08-06 15:02:01,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:02:01,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:01,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:01,561 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:02:01,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 15:02:04,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:02:04,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:04,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 15:02:04,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:05,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938200365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:05,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:05,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 22] total 33 [2021-08-06 15:02:05,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790219031] [2021-08-06 15:02:05,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:02:05,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:05,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:02:05,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:02:05,239 INFO L87 Difference]: Start difference. First operand 3976 states and 9608 transitions. Second operand has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:08,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:08,635 INFO L93 Difference]: Finished difference Result 5008 states and 11628 transitions. [2021-08-06 15:02:08,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-08-06 15:02:08,635 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-06 15:02:08,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:08,641 INFO L225 Difference]: With dead ends: 5008 [2021-08-06 15:02:08,641 INFO L226 Difference]: Without dead ends: 5004 [2021-08-06 15:02:08,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8705 ImplicationChecksByTransitivity, 3245.5ms TimeCoverageRelationStatistics Valid=5366, Invalid=17586, Unknown=0, NotChecked=0, Total=22952 [2021-08-06 15:02:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5004 states. [2021-08-06 15:02:08,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5004 to 3976. [2021-08-06 15:02:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3976 states, 3975 states have (on average 2.4168553459119497) internal successors, (9607), 3975 states have internal predecessors, (9607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:08,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3976 states to 3976 states and 9607 transitions. [2021-08-06 15:02:08,688 INFO L78 Accepts]: Start accepts. Automaton has 3976 states and 9607 transitions. Word has length 49 [2021-08-06 15:02:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:08,688 INFO L470 AbstractCegarLoop]: Abstraction has 3976 states and 9607 transitions. [2021-08-06 15:02:08,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:08,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3976 states and 9607 transitions. [2021-08-06 15:02:08,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-06 15:02:08,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:08,692 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:08,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 15:02:08,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:08,893 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:08,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:08,893 INFO L82 PathProgramCache]: Analyzing trace with hash -167181371, now seen corresponding path program 63 times [2021-08-06 15:02:08,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:08,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763712403] [2021-08-06 15:02:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:08,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:09,111 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 1 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:09,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:09,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763712403] [2021-08-06 15:02:09,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763712403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:09,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087531820] [2021-08-06 15:02:09,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:02:09,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:09,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:09,114 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:02:09,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 15:02:11,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-06 15:02:11,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:11,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 15:02:11,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:12,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087531820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:12,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:12,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 19 [2021-08-06 15:02:12,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528713512] [2021-08-06 15:02:12,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:02:12,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:12,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:02:12,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:02:12,370 INFO L87 Difference]: Start difference. First operand 3976 states and 9607 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:12,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:12,653 INFO L93 Difference]: Finished difference Result 5222 states and 12455 transitions. [2021-08-06 15:02:12,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:02:12,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-06 15:02:12,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:12,661 INFO L225 Difference]: With dead ends: 5222 [2021-08-06 15:02:12,661 INFO L226 Difference]: Without dead ends: 5144 [2021-08-06 15:02:12,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 245.9ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:02:12,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2021-08-06 15:02:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 4547. [2021-08-06 15:02:12,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4547 states, 4546 states have (on average 2.443466783985922) internal successors, (11108), 4546 states have internal predecessors, (11108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4547 states to 4547 states and 11108 transitions. [2021-08-06 15:02:12,724 INFO L78 Accepts]: Start accepts. Automaton has 4547 states and 11108 transitions. Word has length 51 [2021-08-06 15:02:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:12,724 INFO L470 AbstractCegarLoop]: Abstraction has 4547 states and 11108 transitions. [2021-08-06 15:02:12,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 4547 states and 11108 transitions. [2021-08-06 15:02:12,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-06 15:02:12,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:12,729 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:12,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 15:02:12,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-06 15:02:12,930 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:12,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:12,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1901889819, now seen corresponding path program 64 times [2021-08-06 15:02:12,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:12,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178524714] [2021-08-06 15:02:12,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:12,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:13,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:13,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178524714] [2021-08-06 15:02:13,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178524714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:13,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123163864] [2021-08-06 15:02:13,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:02:13,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:13,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:13,341 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:02:13,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 15:02:16,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:02:16,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:16,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-06 15:02:16,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:17,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123163864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:17,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:17,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 39 [2021-08-06 15:02:17,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944628339] [2021-08-06 15:02:17,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-06 15:02:17,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:17,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-06 15:02:17,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:02:17,194 INFO L87 Difference]: Start difference. First operand 4547 states and 11108 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:22,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:22,373 INFO L93 Difference]: Finished difference Result 9249 states and 20971 transitions. [2021-08-06 15:02:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-08-06 15:02:22,373 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-06 15:02:22,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:22,387 INFO L225 Difference]: With dead ends: 9249 [2021-08-06 15:02:22,388 INFO L226 Difference]: Without dead ends: 9216 [2021-08-06 15:02:22,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6688 ImplicationChecksByTransitivity, 3289.5ms TimeCoverageRelationStatistics Valid=1955, Invalid=18637, Unknown=0, NotChecked=0, Total=20592 [2021-08-06 15:02:22,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-08-06 15:02:22,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 5001. [2021-08-06 15:02:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5001 states, 5000 states have (on average 2.443) internal successors, (12215), 5000 states have internal predecessors, (12215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5001 states to 5001 states and 12215 transitions. [2021-08-06 15:02:22,470 INFO L78 Accepts]: Start accepts. Automaton has 5001 states and 12215 transitions. Word has length 51 [2021-08-06 15:02:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:22,470 INFO L470 AbstractCegarLoop]: Abstraction has 5001 states and 12215 transitions. [2021-08-06 15:02:22,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 5001 states and 12215 transitions. [2021-08-06 15:02:22,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-06 15:02:22,496 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:22,496 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:22,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 15:02:22,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:22,696 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:22,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:22,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1171523909, now seen corresponding path program 65 times [2021-08-06 15:02:22,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:22,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695968085] [2021-08-06 15:02:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:22,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:23,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:23,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695968085] [2021-08-06 15:02:23,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695968085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:23,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486443826] [2021-08-06 15:02:23,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:02:23,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:23,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:23,005 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:02:23,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 15:02:25,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-06 15:02:25,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:25,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-06 15:02:25,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:26,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486443826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:26,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:26,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23] total 37 [2021-08-06 15:02:26,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847455278] [2021-08-06 15:02:26,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 15:02:26,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:26,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 15:02:26,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:02:26,954 INFO L87 Difference]: Start difference. First operand 5001 states and 12215 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:30,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:30,649 INFO L93 Difference]: Finished difference Result 7130 states and 16594 transitions. [2021-08-06 15:02:30,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-06 15:02:30,650 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-06 15:02:30,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:30,660 INFO L225 Difference]: With dead ends: 7130 [2021-08-06 15:02:30,660 INFO L226 Difference]: Without dead ends: 7126 [2021-08-06 15:02:30,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3592 ImplicationChecksByTransitivity, 2410.4ms TimeCoverageRelationStatistics Valid=1241, Invalid=10969, Unknown=0, NotChecked=0, Total=12210 [2021-08-06 15:02:30,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7126 states. [2021-08-06 15:02:30,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7126 to 4689. [2021-08-06 15:02:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4689 states, 4688 states have (on average 2.4375) internal successors, (11427), 4688 states have internal predecessors, (11427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:30,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4689 states to 4689 states and 11427 transitions. [2021-08-06 15:02:30,727 INFO L78 Accepts]: Start accepts. Automaton has 4689 states and 11427 transitions. Word has length 51 [2021-08-06 15:02:30,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:30,727 INFO L470 AbstractCegarLoop]: Abstraction has 4689 states and 11427 transitions. [2021-08-06 15:02:30,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:30,728 INFO L276 IsEmpty]: Start isEmpty. Operand 4689 states and 11427 transitions. [2021-08-06 15:02:30,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-06 15:02:30,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:30,732 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:30,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 15:02:30,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-06 15:02:30,932 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:30,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:30,933 INFO L82 PathProgramCache]: Analyzing trace with hash -496654433, now seen corresponding path program 66 times [2021-08-06 15:02:30,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:30,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968553413] [2021-08-06 15:02:30,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:30,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:31,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:31,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968553413] [2021-08-06 15:02:31,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968553413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:31,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358765228] [2021-08-06 15:02:31,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:02:31,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:31,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:31,280 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:02:31,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 15:02:34,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-08-06 15:02:34,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:34,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 15:02:34,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:35,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358765228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:35,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:35,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 40 [2021-08-06 15:02:35,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954930290] [2021-08-06 15:02:35,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:02:35,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:35,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:02:35,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:02:35,288 INFO L87 Difference]: Start difference. First operand 4689 states and 11427 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:40,950 INFO L93 Difference]: Finished difference Result 10458 states and 23569 transitions. [2021-08-06 15:02:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-08-06 15:02:40,950 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-06 15:02:40,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:40,963 INFO L225 Difference]: With dead ends: 10458 [2021-08-06 15:02:40,963 INFO L226 Difference]: Without dead ends: 10410 [2021-08-06 15:02:40,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10557 ImplicationChecksByTransitivity, 3934.5ms TimeCoverageRelationStatistics Valid=3311, Invalid=26791, Unknown=0, NotChecked=0, Total=30102 [2021-08-06 15:02:40,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10410 states. [2021-08-06 15:02:41,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10410 to 4684. [2021-08-06 15:02:41,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4684 states, 4683 states have (on average 2.4371129617766387) internal successors, (11413), 4683 states have internal predecessors, (11413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:41,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 11413 transitions. [2021-08-06 15:02:41,047 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 11413 transitions. Word has length 51 [2021-08-06 15:02:41,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:41,047 INFO L470 AbstractCegarLoop]: Abstraction has 4684 states and 11413 transitions. [2021-08-06 15:02:41,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:41,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 11413 transitions. [2021-08-06 15:02:41,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-06 15:02:41,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:41,051 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:41,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-06 15:02:41,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-06 15:02:41,252 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:41,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:41,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1721552093, now seen corresponding path program 67 times [2021-08-06 15:02:41,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:41,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384566415] [2021-08-06 15:02:41,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:41,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:41,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:41,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384566415] [2021-08-06 15:02:41,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384566415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:41,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038697728] [2021-08-06 15:02:41,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:02:41,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:41,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:41,566 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:02:41,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 15:02:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:44,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 15:02:44,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:45,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038697728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:45,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:45,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-08-06 15:02:45,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734590587] [2021-08-06 15:02:45,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-06 15:02:45,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:45,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-06 15:02:45,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:02:45,670 INFO L87 Difference]: Start difference. First operand 4684 states and 11413 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:52,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:52,013 INFO L93 Difference]: Finished difference Result 12635 states and 28317 transitions. [2021-08-06 15:02:52,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-08-06 15:02:52,013 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-06 15:02:52,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:52,030 INFO L225 Difference]: With dead ends: 12635 [2021-08-06 15:02:52,030 INFO L226 Difference]: Without dead ends: 12557 [2021-08-06 15:02:52,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11882 ImplicationChecksByTransitivity, 4250.2ms TimeCoverageRelationStatistics Valid=4150, Invalid=28792, Unknown=0, NotChecked=0, Total=32942 [2021-08-06 15:02:52,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12557 states. [2021-08-06 15:02:52,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12557 to 4565. [2021-08-06 15:02:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4565 states, 4564 states have (on average 2.4397458369851006) internal successors, (11135), 4564 states have internal predecessors, (11135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4565 states to 4565 states and 11135 transitions. [2021-08-06 15:02:52,116 INFO L78 Accepts]: Start accepts. Automaton has 4565 states and 11135 transitions. Word has length 51 [2021-08-06 15:02:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:52,116 INFO L470 AbstractCegarLoop]: Abstraction has 4565 states and 11135 transitions. [2021-08-06 15:02:52,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 4565 states and 11135 transitions. [2021-08-06 15:02:52,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-06 15:02:52,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:52,120 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:52,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-06 15:02:52,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-06 15:02:52,321 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash 499051431, now seen corresponding path program 68 times [2021-08-06 15:02:52,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:52,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078507281] [2021-08-06 15:02:52,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:52,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:52,684 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:52,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:52,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078507281] [2021-08-06 15:02:52,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078507281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:52,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133699272] [2021-08-06 15:02:52,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:02:52,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:52,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:52,685 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:02:52,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 15:02:55,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:02:55,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:55,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:02:55,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:56,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133699272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:56,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:56,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-08-06 15:02:56,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124141525] [2021-08-06 15:02:56,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 15:02:56,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:56,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 15:02:56,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1587, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:02:56,944 INFO L87 Difference]: Start difference. First operand 4565 states and 11135 transitions. Second operand has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:01,934 INFO L93 Difference]: Finished difference Result 15002 states and 33402 transitions. [2021-08-06 15:03:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-08-06 15:03:01,934 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-06 15:03:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:01,955 INFO L225 Difference]: With dead ends: 15002 [2021-08-06 15:03:01,955 INFO L226 Difference]: Without dead ends: 14732 [2021-08-06 15:03:01,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10138 ImplicationChecksByTransitivity, 3528.8ms TimeCoverageRelationStatistics Valid=4084, Invalid=23972, Unknown=0, NotChecked=0, Total=28056 [2021-08-06 15:03:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14732 states. [2021-08-06 15:03:02,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14732 to 4741. [2021-08-06 15:03:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4741 states, 4740 states have (on average 2.442827004219409) internal successors, (11579), 4740 states have internal predecessors, (11579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:02,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4741 states to 4741 states and 11579 transitions. [2021-08-06 15:03:02,057 INFO L78 Accepts]: Start accepts. Automaton has 4741 states and 11579 transitions. Word has length 51 [2021-08-06 15:03:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:02,057 INFO L470 AbstractCegarLoop]: Abstraction has 4741 states and 11579 transitions. [2021-08-06 15:03:02,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:02,058 INFO L276 IsEmpty]: Start isEmpty. Operand 4741 states and 11579 transitions. [2021-08-06 15:03:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-06 15:03:02,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:02,061 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:02,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-06 15:03:02,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-06 15:03:02,262 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:03:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:02,262 INFO L82 PathProgramCache]: Analyzing trace with hash -218984149, now seen corresponding path program 69 times [2021-08-06 15:03:02,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:02,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662393400] [2021-08-06 15:03:02,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:02,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:02,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:02,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662393400] [2021-08-06 15:03:02,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662393400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:02,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585655329] [2021-08-06 15:03:02,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:03:02,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:02,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:02,570 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:03:02,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 15:03:05,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-06 15:03:05,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:03:05,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:03:05,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:06,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585655329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:06,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:06,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-08-06 15:03:06,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088497137] [2021-08-06 15:03:06,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 15:03:06,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:06,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 15:03:06,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:03:06,842 INFO L87 Difference]: Start difference. First operand 4741 states and 11579 transitions. Second operand has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:10,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:10,652 INFO L93 Difference]: Finished difference Result 15974 states and 35294 transitions. [2021-08-06 15:03:10,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-08-06 15:03:10,653 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-06 15:03:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:10,677 INFO L225 Difference]: With dead ends: 15974 [2021-08-06 15:03:10,677 INFO L226 Difference]: Without dead ends: 15650 [2021-08-06 15:03:10,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8469 ImplicationChecksByTransitivity, 3131.1ms TimeCoverageRelationStatistics Valid=3844, Invalid=19718, Unknown=0, NotChecked=0, Total=23562 [2021-08-06 15:03:10,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15650 states. [2021-08-06 15:03:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15650 to 4765. [2021-08-06 15:03:10,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4765 states, 4764 states have (on average 2.440596137699412) internal successors, (11627), 4764 states have internal predecessors, (11627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4765 states to 4765 states and 11627 transitions. [2021-08-06 15:03:10,794 INFO L78 Accepts]: Start accepts. Automaton has 4765 states and 11627 transitions. Word has length 51 [2021-08-06 15:03:10,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:10,795 INFO L470 AbstractCegarLoop]: Abstraction has 4765 states and 11627 transitions. [2021-08-06 15:03:10,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4765 states and 11627 transitions. [2021-08-06 15:03:10,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-06 15:03:10,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:10,800 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:10,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 15:03:11,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:11,014 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:03:11,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:11,015 INFO L82 PathProgramCache]: Analyzing trace with hash 344449967, now seen corresponding path program 70 times [2021-08-06 15:03:11,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:11,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68988978] [2021-08-06 15:03:11,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:11,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:11,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:11,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68988978] [2021-08-06 15:03:11,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68988978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:11,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781016144] [2021-08-06 15:03:11,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:03:11,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:11,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:11,326 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:03:11,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 15:03:14,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:03:14,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:03:14,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 15:03:14,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:15,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781016144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:15,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:15,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2021-08-06 15:03:15,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613297211] [2021-08-06 15:03:15,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-06 15:03:15,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:15,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-06 15:03:15,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:03:15,716 INFO L87 Difference]: Start difference. First operand 4765 states and 11627 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:20,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:20,154 INFO L93 Difference]: Finished difference Result 15636 states and 34293 transitions. [2021-08-06 15:03:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-08-06 15:03:20,155 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-06 15:03:20,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:20,176 INFO L225 Difference]: With dead ends: 15636 [2021-08-06 15:03:20,176 INFO L226 Difference]: Without dead ends: 15168 [2021-08-06 15:03:20,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11849 ImplicationChecksByTransitivity, 3781.7ms TimeCoverageRelationStatistics Valid=5935, Invalid=25571, Unknown=0, NotChecked=0, Total=31506 [2021-08-06 15:03:20,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15168 states. [2021-08-06 15:03:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15168 to 4781. [2021-08-06 15:03:20,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4781 states, 4780 states have (on average 2.439121338912134) internal successors, (11659), 4780 states have internal predecessors, (11659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4781 states to 4781 states and 11659 transitions. [2021-08-06 15:03:20,291 INFO L78 Accepts]: Start accepts. Automaton has 4781 states and 11659 transitions. Word has length 51 [2021-08-06 15:03:20,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:20,291 INFO L470 AbstractCegarLoop]: Abstraction has 4781 states and 11659 transitions. [2021-08-06 15:03:20,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:20,292 INFO L276 IsEmpty]: Start isEmpty. Operand 4781 states and 11659 transitions. [2021-08-06 15:03:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-06 15:03:20,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:20,295 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:20,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-06 15:03:20,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:20,496 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:03:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:20,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1914217267, now seen corresponding path program 71 times [2021-08-06 15:03:20,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:20,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761418583] [2021-08-06 15:03:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:20,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:20,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:20,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761418583] [2021-08-06 15:03:20,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761418583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:20,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944257236] [2021-08-06 15:03:20,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:03:20,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:20,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:20,814 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:03:20,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 15:03:24,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-06 15:03:24,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:03:24,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:03:24,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:25,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944257236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:25,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:25,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-08-06 15:03:25,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543657044] [2021-08-06 15:03:25,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-06 15:03:25,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:25,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-06 15:03:25,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1846, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:03:25,151 INFO L87 Difference]: Start difference. First operand 4781 states and 11659 transitions. Second operand has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:29,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:29,791 INFO L93 Difference]: Finished difference Result 14007 states and 31265 transitions. [2021-08-06 15:03:29,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-08-06 15:03:29,791 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-06 15:03:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:29,810 INFO L225 Difference]: With dead ends: 14007 [2021-08-06 15:03:29,810 INFO L226 Difference]: Without dead ends: 13413 [2021-08-06 15:03:29,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12336 ImplicationChecksByTransitivity, 4050.7ms TimeCoverageRelationStatistics Valid=6793, Invalid=26513, Unknown=0, NotChecked=0, Total=33306 [2021-08-06 15:03:29,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13413 states. [2021-08-06 15:03:29,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13413 to 4829. [2021-08-06 15:03:29,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4828 states have (on average 2.3985086992543496) internal successors, (11580), 4828 states have internal predecessors, (11580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:29,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 11580 transitions. [2021-08-06 15:03:29,910 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 11580 transitions. Word has length 51 [2021-08-06 15:03:29,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:29,910 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 11580 transitions. [2021-08-06 15:03:29,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:29,910 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 11580 transitions. [2021-08-06 15:03:29,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-06 15:03:29,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:29,915 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:29,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-06 15:03:30,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:30,129 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:03:30,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:30,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1152851267, now seen corresponding path program 72 times [2021-08-06 15:03:30,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:30,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023689427] [2021-08-06 15:03:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:30,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:30,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:30,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023689427] [2021-08-06 15:03:30,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023689427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:30,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583592106] [2021-08-06 15:03:30,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:03:30,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:30,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:30,387 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:03:30,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 15:03:33,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-06 15:03:33,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:03:33,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 15:03:33,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:34,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583592106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:34,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:34,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 37 [2021-08-06 15:03:34,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123021961] [2021-08-06 15:03:34,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 15:03:34,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:34,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 15:03:34,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:03:34,903 INFO L87 Difference]: Start difference. First operand 4829 states and 11580 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:41,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:41,243 INFO L93 Difference]: Finished difference Result 9446 states and 21206 transitions. [2021-08-06 15:03:41,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-08-06 15:03:41,243 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-06 15:03:41,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:41,254 INFO L225 Difference]: With dead ends: 9446 [2021-08-06 15:03:41,254 INFO L226 Difference]: Without dead ends: 9442 [2021-08-06 15:03:41,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22325 ImplicationChecksByTransitivity, 5821.0ms TimeCoverageRelationStatistics Valid=11066, Invalid=40690, Unknown=0, NotChecked=0, Total=51756 [2021-08-06 15:03:41,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9442 states. [2021-08-06 15:03:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9442 to 4919. [2021-08-06 15:03:41,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4919 states, 4918 states have (on average 2.4131760878405855) internal successors, (11868), 4918 states have internal predecessors, (11868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:41,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 11868 transitions. [2021-08-06 15:03:41,325 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 11868 transitions. Word has length 51 [2021-08-06 15:03:41,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:41,325 INFO L470 AbstractCegarLoop]: Abstraction has 4919 states and 11868 transitions. [2021-08-06 15:03:41,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:41,325 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 11868 transitions. [2021-08-06 15:03:41,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 15:03:41,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:41,330 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:41,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-06 15:03:41,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-06 15:03:41,543 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:03:41,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:41,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2117849603, now seen corresponding path program 73 times [2021-08-06 15:03:41,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:41,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578789591] [2021-08-06 15:03:41,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:41,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:41,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:41,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578789591] [2021-08-06 15:03:41,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578789591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:41,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731651480] [2021-08-06 15:03:41,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:03:41,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:41,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:41,895 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:03:41,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 15:03:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:45,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 15:03:45,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:46,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731651480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:46,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:46,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-08-06 15:03:46,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384653093] [2021-08-06 15:03:46,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-06 15:03:46,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:46,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-06 15:03:46,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1843, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:03:46,378 INFO L87 Difference]: Start difference. First operand 4919 states and 11868 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:51,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:51,145 INFO L93 Difference]: Finished difference Result 6854 states and 15607 transitions. [2021-08-06 15:03:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-08-06 15:03:51,146 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 15:03:51,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:51,154 INFO L225 Difference]: With dead ends: 6854 [2021-08-06 15:03:51,154 INFO L226 Difference]: Without dead ends: 6542 [2021-08-06 15:03:51,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13205 ImplicationChecksByTransitivity, 4304.0ms TimeCoverageRelationStatistics Valid=9334, Invalid=26198, Unknown=0, NotChecked=0, Total=35532 [2021-08-06 15:03:51,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6542 states. [2021-08-06 15:03:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6542 to 4918. [2021-08-06 15:03:51,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4918 states, 4917 states have (on average 2.4102094773235714) internal successors, (11851), 4917 states have internal predecessors, (11851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:51,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4918 states to 4918 states and 11851 transitions. [2021-08-06 15:03:51,213 INFO L78 Accepts]: Start accepts. Automaton has 4918 states and 11851 transitions. Word has length 53 [2021-08-06 15:03:51,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:51,213 INFO L470 AbstractCegarLoop]: Abstraction has 4918 states and 11851 transitions. [2021-08-06 15:03:51,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:51,213 INFO L276 IsEmpty]: Start isEmpty. Operand 4918 states and 11851 transitions. [2021-08-06 15:03:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 15:03:51,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:51,217 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:51,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-06 15:03:51,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:51,418 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:03:51,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:51,418 INFO L82 PathProgramCache]: Analyzing trace with hash -226669163, now seen corresponding path program 74 times [2021-08-06 15:03:51,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:51,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052979880] [2021-08-06 15:03:51,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:51,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:51,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:51,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052979880] [2021-08-06 15:03:51,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052979880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:51,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825640660] [2021-08-06 15:03:51,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:03:51,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:51,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:51,705 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:03:51,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 15:03:55,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:03:55,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:03:55,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 15:03:55,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:56,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825640660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:56,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:56,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 24] total 36 [2021-08-06 15:03:56,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472735735] [2021-08-06 15:03:56,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 15:03:56,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:56,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 15:03:56,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 15:03:56,222 INFO L87 Difference]: Start difference. First operand 4918 states and 11851 transitions. Second operand has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:00,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:00,549 INFO L93 Difference]: Finished difference Result 6178 states and 14323 transitions. [2021-08-06 15:04:00,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-08-06 15:04:00,549 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 15:04:00,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:00,555 INFO L225 Difference]: With dead ends: 6178 [2021-08-06 15:04:00,555 INFO L226 Difference]: Without dead ends: 6174 [2021-08-06 15:04:00,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12456 ImplicationChecksByTransitivity, 4089.2ms TimeCoverageRelationStatistics Valid=7354, Invalid=24152, Unknown=0, NotChecked=0, Total=31506 [2021-08-06 15:04:00,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6174 states. [2021-08-06 15:04:00,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6174 to 4882. [2021-08-06 15:04:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4882 states, 4881 states have (on average 2.4130301167793484) internal successors, (11778), 4881 states have internal predecessors, (11778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:00,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4882 states to 4882 states and 11778 transitions. [2021-08-06 15:04:00,609 INFO L78 Accepts]: Start accepts. Automaton has 4882 states and 11778 transitions. Word has length 53 [2021-08-06 15:04:00,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:00,610 INFO L470 AbstractCegarLoop]: Abstraction has 4882 states and 11778 transitions. [2021-08-06 15:04:00,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:00,610 INFO L276 IsEmpty]: Start isEmpty. Operand 4882 states and 11778 transitions. [2021-08-06 15:04:00,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-06 15:04:00,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:00,615 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:00,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 15:04:00,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:00,829 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:04:00,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:00,829 INFO L82 PathProgramCache]: Analyzing trace with hash -623161511, now seen corresponding path program 75 times [2021-08-06 15:04:00,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:00,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9264270] [2021-08-06 15:04:00,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:00,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 64 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:04:01,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:01,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9264270] [2021-08-06 15:04:01,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9264270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:01,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949139587] [2021-08-06 15:04:01,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:04:01,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:01,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:01,041 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:04:01,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 15:04:04,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-06 15:04:04,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:04:04,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 15:04:04,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 12 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:04:05,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949139587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:05,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:05,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2021-08-06 15:04:05,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388731080] [2021-08-06 15:04:05,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:04:05,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:05,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:04:05,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:04:05,037 INFO L87 Difference]: Start difference. First operand 4882 states and 11778 transitions. Second operand has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:06,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:06,234 INFO L93 Difference]: Finished difference Result 7672 states and 17260 transitions. [2021-08-06 15:04:06,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 15:04:06,234 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-06 15:04:06,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:06,248 INFO L225 Difference]: With dead ends: 7672 [2021-08-06 15:04:06,248 INFO L226 Difference]: Without dead ends: 7669 [2021-08-06 15:04:06,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 928.1ms TimeCoverageRelationStatistics Valid=969, Invalid=4001, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 15:04:06,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7669 states. [2021-08-06 15:04:06,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7669 to 2872. [2021-08-06 15:04:06,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 2.355276907001045) internal successors, (6762), 2871 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:06,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 6762 transitions. [2021-08-06 15:04:06,320 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 6762 transitions. Word has length 53 [2021-08-06 15:04:06,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:06,320 INFO L470 AbstractCegarLoop]: Abstraction has 2872 states and 6762 transitions. [2021-08-06 15:04:06,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:06,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 6762 transitions. [2021-08-06 15:04:06,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 15:04:06,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:06,323 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:06,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 15:04:06,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-06 15:04:06,523 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:04:06,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:06,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1484254207, now seen corresponding path program 76 times [2021-08-06 15:04:06,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:06,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215250036] [2021-08-06 15:04:06,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:06,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 1 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:06,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:06,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215250036] [2021-08-06 15:04:06,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215250036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:06,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562958355] [2021-08-06 15:04:06,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:04:06,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:06,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:06,729 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:04:06,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 15:04:10,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:04:10,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:04:10,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:04:10,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:10,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562958355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:10,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:10,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 15:04:10,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667235621] [2021-08-06 15:04:10,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:04:10,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:10,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:04:10,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:04:10,733 INFO L87 Difference]: Start difference. First operand 2872 states and 6762 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 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) [2021-08-06 15:04:10,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:10,913 INFO L93 Difference]: Finished difference Result 3935 states and 9073 transitions. [2021-08-06 15:04:10,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:04:10,914 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 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 55 [2021-08-06 15:04:10,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:10,919 INFO L225 Difference]: With dead ends: 3935 [2021-08-06 15:04:10,919 INFO L226 Difference]: Without dead ends: 3860 [2021-08-06 15:04:10,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:04:10,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2021-08-06 15:04:10,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3443. [2021-08-06 15:04:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3442 states have (on average 2.3951191167925625) internal successors, (8244), 3442 states have internal predecessors, (8244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:10,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 8244 transitions. [2021-08-06 15:04:10,954 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 8244 transitions. Word has length 55 [2021-08-06 15:04:10,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:10,954 INFO L470 AbstractCegarLoop]: Abstraction has 3443 states and 8244 transitions. [2021-08-06 15:04:10,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 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) [2021-08-06 15:04:10,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 8244 transitions. [2021-08-06 15:04:10,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 15:04:10,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:10,957 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:10,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-06 15:04:11,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-06 15:04:11,158 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:04:11,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:11,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1513984983, now seen corresponding path program 77 times [2021-08-06 15:04:11,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:11,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890353051] [2021-08-06 15:04:11,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:11,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:11,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:11,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890353051] [2021-08-06 15:04:11,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890353051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:11,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431715586] [2021-08-06 15:04:11,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:04:11,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:11,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:11,571 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:04:11,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 15:04:15,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-08-06 15:04:15,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:04:15,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-06 15:04:15,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:16,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431715586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:16,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:16,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 43 [2021-08-06 15:04:16,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376739165] [2021-08-06 15:04:16,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 15:04:16,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:16,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 15:04:16,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:04:16,464 INFO L87 Difference]: Start difference. First operand 3443 states and 8244 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:22,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:22,842 INFO L93 Difference]: Finished difference Result 7425 states and 16157 transitions. [2021-08-06 15:04:22,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-08-06 15:04:22,843 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 15:04:22,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:22,852 INFO L225 Difference]: With dead ends: 7425 [2021-08-06 15:04:22,852 INFO L226 Difference]: Without dead ends: 7401 [2021-08-06 15:04:22,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9277 ImplicationChecksByTransitivity, 4042.7ms TimeCoverageRelationStatistics Valid=2404, Invalid=24986, Unknown=0, NotChecked=0, Total=27390 [2021-08-06 15:04:22,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7401 states. [2021-08-06 15:04:22,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7401 to 3577. [2021-08-06 15:04:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3577 states, 3576 states have (on average 2.3987695749440716) internal successors, (8578), 3576 states have internal predecessors, (8578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3577 states to 3577 states and 8578 transitions. [2021-08-06 15:04:22,902 INFO L78 Accepts]: Start accepts. Automaton has 3577 states and 8578 transitions. Word has length 55 [2021-08-06 15:04:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:22,902 INFO L470 AbstractCegarLoop]: Abstraction has 3577 states and 8578 transitions. [2021-08-06 15:04:22,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand 3577 states and 8578 transitions. [2021-08-06 15:04:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 15:04:22,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:22,905 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:22,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 15:04:23,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:23,105 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:04:23,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:23,106 INFO L82 PathProgramCache]: Analyzing trace with hash 783619073, now seen corresponding path program 78 times [2021-08-06 15:04:23,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:23,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405782009] [2021-08-06 15:04:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:23,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:23,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:23,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405782009] [2021-08-06 15:04:23,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405782009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:23,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379879749] [2021-08-06 15:04:23,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:04:23,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:23,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:23,656 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:04:23,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 15:04:27,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-08-06 15:04:27,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:04:27,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-06 15:04:27,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:28,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379879749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:28,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:28,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 46 [2021-08-06 15:04:28,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636887275] [2021-08-06 15:04:28,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-06 15:04:28,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:28,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-06 15:04:28,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:04:28,722 INFO L87 Difference]: Start difference. First operand 3577 states and 8578 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:30,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:30,205 INFO L93 Difference]: Finished difference Result 5634 states and 12714 transitions. [2021-08-06 15:04:30,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 15:04:30,206 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 15:04:30,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:30,215 INFO L225 Difference]: With dead ends: 5634 [2021-08-06 15:04:30,215 INFO L226 Difference]: Without dead ends: 5630 [2021-08-06 15:04:30,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 1313.9ms TimeCoverageRelationStatistics Valid=478, Invalid=3682, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 15:04:30,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5630 states. [2021-08-06 15:04:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5630 to 3763. [2021-08-06 15:04:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.390749601275917) internal successors, (8994), 3762 states have internal predecessors, (8994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:30,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 8994 transitions. [2021-08-06 15:04:30,298 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 8994 transitions. Word has length 55 [2021-08-06 15:04:30,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:30,298 INFO L470 AbstractCegarLoop]: Abstraction has 3763 states and 8994 transitions. [2021-08-06 15:04:30,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:30,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 8994 transitions. [2021-08-06 15:04:30,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 15:04:30,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:30,301 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:30,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 15:04:30,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:30,502 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:04:30,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:30,502 INFO L82 PathProgramCache]: Analyzing trace with hash 635191899, now seen corresponding path program 79 times [2021-08-06 15:04:30,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:30,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222752156] [2021-08-06 15:04:30,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:30,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:30,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:30,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222752156] [2021-08-06 15:04:30,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222752156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:30,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389250912] [2021-08-06 15:04:30,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:04:30,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:30,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:30,870 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:04:30,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 15:04:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:34,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-06 15:04:34,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:35,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389250912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:35,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:35,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 43 [2021-08-06 15:04:35,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388968925] [2021-08-06 15:04:35,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 15:04:35,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:35,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 15:04:35,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:04:35,936 INFO L87 Difference]: Start difference. First operand 3763 states and 8994 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:43,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:43,344 INFO L93 Difference]: Finished difference Result 9168 states and 19859 transitions. [2021-08-06 15:04:43,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-08-06 15:04:43,344 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 15:04:43,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:43,354 INFO L225 Difference]: With dead ends: 9168 [2021-08-06 15:04:43,354 INFO L226 Difference]: Without dead ends: 9120 [2021-08-06 15:04:43,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13753 ImplicationChecksByTransitivity, 5115.3ms TimeCoverageRelationStatistics Valid=3843, Invalid=34769, Unknown=0, NotChecked=0, Total=38612 [2021-08-06 15:04:43,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9120 states. [2021-08-06 15:04:43,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9120 to 3632. [2021-08-06 15:04:43,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3632 states, 3631 states have (on average 2.3952079316992565) internal successors, (8697), 3631 states have internal predecessors, (8697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 8697 transitions. [2021-08-06 15:04:43,411 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 8697 transitions. Word has length 55 [2021-08-06 15:04:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:43,411 INFO L470 AbstractCegarLoop]: Abstraction has 3632 states and 8697 transitions. [2021-08-06 15:04:43,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 8697 transitions. [2021-08-06 15:04:43,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 15:04:43,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:43,415 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:43,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 15:04:43,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:43,615 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:04:43,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:43,615 INFO L82 PathProgramCache]: Analyzing trace with hash -397713953, now seen corresponding path program 80 times [2021-08-06 15:04:43,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:43,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527303777] [2021-08-06 15:04:43,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:43,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:44,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:44,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527303777] [2021-08-06 15:04:44,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527303777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:44,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868529199] [2021-08-06 15:04:44,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:04:44,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:44,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:44,049 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:04:44,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 15:04:47,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:04:47,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:04:47,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-06 15:04:47,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:49,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868529199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:49,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:49,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 44 [2021-08-06 15:04:49,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079779505] [2021-08-06 15:04:49,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-06 15:04:49,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:49,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-06 15:04:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:04:49,106 INFO L87 Difference]: Start difference. First operand 3632 states and 8697 transitions. Second operand has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:56,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:56,702 INFO L93 Difference]: Finished difference Result 10861 states and 23255 transitions. [2021-08-06 15:04:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-08-06 15:04:56,703 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 15:04:56,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:56,715 INFO L225 Difference]: With dead ends: 10861 [2021-08-06 15:04:56,715 INFO L226 Difference]: Without dead ends: 10783 [2021-08-06 15:04:56,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16619 ImplicationChecksByTransitivity, 5103.8ms TimeCoverageRelationStatistics Valid=5098, Invalid=40058, Unknown=0, NotChecked=0, Total=45156 [2021-08-06 15:04:56,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10783 states. [2021-08-06 15:04:56,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10783 to 3613. [2021-08-06 15:04:56,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.394795127353267) internal successors, (8650), 3612 states have internal predecessors, (8650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:56,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 8650 transitions. [2021-08-06 15:04:56,798 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 8650 transitions. Word has length 55 [2021-08-06 15:04:56,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:56,798 INFO L470 AbstractCegarLoop]: Abstraction has 3613 states and 8650 transitions. [2021-08-06 15:04:56,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:56,798 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 8650 transitions. [2021-08-06 15:04:56,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 15:04:56,801 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:56,801 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:56,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-06 15:04:57,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:57,002 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:04:57,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:57,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1643423331, now seen corresponding path program 81 times [2021-08-06 15:04:57,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:57,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862689607] [2021-08-06 15:04:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:57,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:57,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:57,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862689607] [2021-08-06 15:04:57,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862689607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:57,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959199244] [2021-08-06 15:04:57,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:04:57,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:57,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:57,412 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:04:57,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 15:05:01,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-08-06 15:05:01,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:05:01,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-06 15:05:01,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:05:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:02,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959199244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:02,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:05:02,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 45 [2021-08-06 15:05:02,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943555906] [2021-08-06 15:05:02,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-06 15:05:02,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:05:02,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-06 15:05:02,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:05:02,634 INFO L87 Difference]: Start difference. First operand 3613 states and 8650 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:09,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:05:09,422 INFO L93 Difference]: Finished difference Result 12877 states and 27358 transitions. [2021-08-06 15:05:09,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-08-06 15:05:09,422 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 15:05:09,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:05:09,440 INFO L225 Difference]: With dead ends: 12877 [2021-08-06 15:05:09,441 INFO L226 Difference]: Without dead ends: 12763 [2021-08-06 15:05:09,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15342 ImplicationChecksByTransitivity, 4909.5ms TimeCoverageRelationStatistics Valid=5445, Invalid=35967, Unknown=0, NotChecked=0, Total=41412 [2021-08-06 15:05:09,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-08-06 15:05:09,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 3596. [2021-08-06 15:05:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3596 states, 3595 states have (on average 2.396940194714882) internal successors, (8617), 3595 states have internal predecessors, (8617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3596 states to 3596 states and 8617 transitions. [2021-08-06 15:05:09,525 INFO L78 Accepts]: Start accepts. Automaton has 3596 states and 8617 transitions. Word has length 55 [2021-08-06 15:05:09,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:05:09,525 INFO L470 AbstractCegarLoop]: Abstraction has 3596 states and 8617 transitions. [2021-08-06 15:05:09,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:09,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3596 states and 8617 transitions. [2021-08-06 15:05:09,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 15:05:09,527 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:05:09,527 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:05:09,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-06 15:05:09,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:09,728 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:05:09,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:05:09,728 INFO L82 PathProgramCache]: Analyzing trace with hash 257022951, now seen corresponding path program 82 times [2021-08-06 15:05:09,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:05:09,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680848185] [2021-08-06 15:05:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:05:09,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:05:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:10,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:05:10,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680848185] [2021-08-06 15:05:10,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680848185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:10,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477889805] [2021-08-06 15:05:10,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:05:10,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:10,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:05:10,096 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:05:10,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 15:05:14,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:05:14,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:05:14,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 15:05:14,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:05:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:15,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477889805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:15,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:05:15,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 46 [2021-08-06 15:05:15,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193975400] [2021-08-06 15:05:15,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-06 15:05:15,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:05:15,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-06 15:05:15,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1905, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:05:15,388 INFO L87 Difference]: Start difference. First operand 3596 states and 8617 transitions. Second operand has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:20,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:05:20,102 INFO L93 Difference]: Finished difference Result 14615 states and 30939 transitions. [2021-08-06 15:05:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-08-06 15:05:20,103 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 15:05:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:05:20,124 INFO L225 Difference]: With dead ends: 14615 [2021-08-06 15:05:20,124 INFO L226 Difference]: Without dead ends: 14345 [2021-08-06 15:05:20,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9901 ImplicationChecksByTransitivity, 3606.9ms TimeCoverageRelationStatistics Valid=4135, Invalid=23255, Unknown=0, NotChecked=0, Total=27390 [2021-08-06 15:05:20,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14345 states. [2021-08-06 15:05:20,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14345 to 3616. [2021-08-06 15:05:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3616 states, 3615 states have (on average 2.394744121715076) internal successors, (8657), 3615 states have internal predecessors, (8657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:20,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 8657 transitions. [2021-08-06 15:05:20,215 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 8657 transitions. Word has length 55 [2021-08-06 15:05:20,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:05:20,215 INFO L470 AbstractCegarLoop]: Abstraction has 3616 states and 8657 transitions. [2021-08-06 15:05:20,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:20,215 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 8657 transitions. [2021-08-06 15:05:20,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 15:05:20,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:05:20,217 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:05:20,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-06 15:05:20,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-08-06 15:05:20,418 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:05:20,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:05:20,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1527988629, now seen corresponding path program 83 times [2021-08-06 15:05:20,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:05:20,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173276946] [2021-08-06 15:05:20,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:05:20,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:05:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:20,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:05:20,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173276946] [2021-08-06 15:05:20,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173276946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:20,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060963597] [2021-08-06 15:05:20,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:05:20,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:20,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:05:20,813 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:05:20,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 15:05:24,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-06 15:05:24,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:05:24,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 15:05:24,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:05:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:26,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060963597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:26,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:05:26,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 48 [2021-08-06 15:05:26,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095808228] [2021-08-06 15:05:26,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-06 15:05:26,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:05:26,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-06 15:05:26,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2053, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:05:26,090 INFO L87 Difference]: Start difference. First operand 3616 states and 8657 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:31,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:05:31,285 INFO L93 Difference]: Finished difference Result 15031 states and 31681 transitions. [2021-08-06 15:05:31,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-08-06 15:05:31,285 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 15:05:31,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:05:31,304 INFO L225 Difference]: With dead ends: 15031 [2021-08-06 15:05:31,304 INFO L226 Difference]: Without dead ends: 14626 [2021-08-06 15:05:31,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14225 ImplicationChecksByTransitivity, 4352.3ms TimeCoverageRelationStatistics Valid=6292, Invalid=30380, Unknown=0, NotChecked=0, Total=36672 [2021-08-06 15:05:31,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14626 states. [2021-08-06 15:05:31,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14626 to 3632. [2021-08-06 15:05:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3632 states, 3631 states have (on average 2.3930046819058113) internal successors, (8689), 3631 states have internal predecessors, (8689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 8689 transitions. [2021-08-06 15:05:31,396 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 8689 transitions. Word has length 55 [2021-08-06 15:05:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:05:31,396 INFO L470 AbstractCegarLoop]: Abstraction has 3632 states and 8689 transitions. [2021-08-06 15:05:31,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:31,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 8689 transitions. [2021-08-06 15:05:31,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 15:05:31,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:05:31,399 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:05:31,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-06 15:05:31,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:31,600 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:05:31,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:05:31,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1956704785, now seen corresponding path program 84 times [2021-08-06 15:05:31,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:05:31,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927729612] [2021-08-06 15:05:31,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:05:31,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:05:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:31,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:05:31,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927729612] [2021-08-06 15:05:31,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927729612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:31,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705065273] [2021-08-06 15:05:31,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:05:31,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:31,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:05:31,953 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:05:31,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 15:05:36,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-06 15:05:36,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:05:36,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 15:05:36,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:05:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:37,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705065273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:37,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:05:37,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2021-08-06 15:05:37,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808568505] [2021-08-06 15:05:37,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-06 15:05:37,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:05:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-06 15:05:37,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2118, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 15:05:37,406 INFO L87 Difference]: Start difference. First operand 3632 states and 8689 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:42,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:05:42,992 INFO L93 Difference]: Finished difference Result 14708 states and 30856 transitions. [2021-08-06 15:05:42,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-08-06 15:05:42,992 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 15:05:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:05:43,013 INFO L225 Difference]: With dead ends: 14708 [2021-08-06 15:05:43,013 INFO L226 Difference]: Without dead ends: 14171 [2021-08-06 15:05:43,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16959 ImplicationChecksByTransitivity, 4637.2ms TimeCoverageRelationStatistics Valid=8234, Invalid=34822, Unknown=0, NotChecked=0, Total=43056 [2021-08-06 15:05:43,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14171 states. [2021-08-06 15:05:43,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14171 to 3644. [2021-08-06 15:05:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 2.3917101290145486) internal successors, (8713), 3643 states have internal predecessors, (8713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:43,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 8713 transitions. [2021-08-06 15:05:43,102 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 8713 transitions. Word has length 55 [2021-08-06 15:05:43,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:05:43,102 INFO L470 AbstractCegarLoop]: Abstraction has 3644 states and 8713 transitions. [2021-08-06 15:05:43,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:43,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 8713 transitions. [2021-08-06 15:05:43,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 15:05:43,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:05:43,105 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:05:43,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-06 15:05:43,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:43,306 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:05:43,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:05:43,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1532136051, now seen corresponding path program 85 times [2021-08-06 15:05:43,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:05:43,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23178418] [2021-08-06 15:05:43,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:05:43,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:05:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:43,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:05:43,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23178418] [2021-08-06 15:05:43,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23178418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:43,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895187853] [2021-08-06 15:05:43,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:05:43,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:43,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:05:43,705 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:05:43,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 15:05:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:47,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 15:05:47,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:05:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:49,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895187853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:49,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:05:49,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-08-06 15:05:49,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714560637] [2021-08-06 15:05:49,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-06 15:05:49,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:05:49,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-06 15:05:49,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2100, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 15:05:49,283 INFO L87 Difference]: Start difference. First operand 3644 states and 8713 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:05:54,319 INFO L93 Difference]: Finished difference Result 14160 states and 30682 transitions. [2021-08-06 15:05:54,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-08-06 15:05:54,319 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 15:05:54,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:05:54,338 INFO L225 Difference]: With dead ends: 14160 [2021-08-06 15:05:54,338 INFO L226 Difference]: Without dead ends: 13359 [2021-08-06 15:05:54,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13248 ImplicationChecksByTransitivity, 4459.9ms TimeCoverageRelationStatistics Valid=7677, Invalid=29379, Unknown=0, NotChecked=0, Total=37056 [2021-08-06 15:05:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13359 states. [2021-08-06 15:05:54,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13359 to 3798. [2021-08-06 15:05:54,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 2.3429022912825914) internal successors, (8896), 3797 states have internal predecessors, (8896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 8896 transitions. [2021-08-06 15:05:54,428 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 8896 transitions. Word has length 55 [2021-08-06 15:05:54,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:05:54,428 INFO L470 AbstractCegarLoop]: Abstraction has 3798 states and 8896 transitions. [2021-08-06 15:05:54,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:54,428 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 8896 transitions. [2021-08-06 15:05:54,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 15:05:54,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:05:54,431 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:05:54,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-06 15:05:54,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:54,632 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:05:54,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:05:54,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1421025927, now seen corresponding path program 86 times [2021-08-06 15:05:54,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:05:54,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416846475] [2021-08-06 15:05:54,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:05:54,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:05:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 68 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:54,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:05:54,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416846475] [2021-08-06 15:05:54,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416846475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:54,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702212937] [2021-08-06 15:05:54,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:05:54,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:54,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:05:54,912 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:05:54,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 15:05:59,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:05:59,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:05:59,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 15:05:59,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:06:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 68 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:00,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702212937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:00,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:06:00,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26] total 41 [2021-08-06 15:06:00,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792950830] [2021-08-06 15:06:00,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-06 15:06:00,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:06:00,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-06 15:06:00,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:06:00,599 INFO L87 Difference]: Start difference. First operand 3798 states and 8896 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:07,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:06:07,824 INFO L93 Difference]: Finished difference Result 11372 states and 25135 transitions. [2021-08-06 15:06:07,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2021-08-06 15:06:07,825 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 15:06:07,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:06:07,841 INFO L225 Difference]: With dead ends: 11372 [2021-08-06 15:06:07,841 INFO L226 Difference]: Without dead ends: 11368 [2021-08-06 15:06:07,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26219 ImplicationChecksByTransitivity, 6667.8ms TimeCoverageRelationStatistics Valid=11996, Invalid=49756, Unknown=0, NotChecked=0, Total=61752 [2021-08-06 15:06:07,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11368 states. [2021-08-06 15:06:07,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11368 to 3367. [2021-08-06 15:06:07,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3367 states, 3366 states have (on average 2.3499702911467617) internal successors, (7910), 3366 states have internal predecessors, (7910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3367 states to 3367 states and 7910 transitions. [2021-08-06 15:06:07,917 INFO L78 Accepts]: Start accepts. Automaton has 3367 states and 7910 transitions. Word has length 55 [2021-08-06 15:06:07,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:06:07,917 INFO L470 AbstractCegarLoop]: Abstraction has 3367 states and 7910 transitions. [2021-08-06 15:06:07,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3367 states and 7910 transitions. [2021-08-06 15:06:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 15:06:07,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:06:07,920 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:06:07,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 15:06:08,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:08,120 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:06:08,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:06:08,120 INFO L82 PathProgramCache]: Analyzing trace with hash 554537791, now seen corresponding path program 87 times [2021-08-06 15:06:08,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:06:08,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215800325] [2021-08-06 15:06:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:06:08,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:06:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:08,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:06:08,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215800325] [2021-08-06 15:06:08,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215800325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:08,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670264282] [2021-08-06 15:06:08,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:06:08,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:08,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:06:08,477 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:06:08,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 15:06:12,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-06 15:06:12,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:06:12,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:06:12,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:06:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:14,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670264282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:14,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:06:14,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2021-08-06 15:06:14,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071464987] [2021-08-06 15:06:14,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-06 15:06:14,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:06:14,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-06 15:06:14,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=2172, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 15:06:14,178 INFO L87 Difference]: Start difference. First operand 3367 states and 7910 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:06:19,974 INFO L93 Difference]: Finished difference Result 5653 states and 12337 transitions. [2021-08-06 15:06:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-08-06 15:06:19,974 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 15:06:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:06:19,980 INFO L225 Difference]: With dead ends: 5653 [2021-08-06 15:06:19,980 INFO L226 Difference]: Without dead ends: 5275 [2021-08-06 15:06:19,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18266 ImplicationChecksByTransitivity, 5106.9ms TimeCoverageRelationStatistics Valid=12509, Invalid=34797, Unknown=0, NotChecked=0, Total=47306 [2021-08-06 15:06:19,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5275 states. [2021-08-06 15:06:20,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5275 to 3364. [2021-08-06 15:06:20,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3364 states, 3363 states have (on average 2.3452274754683318) internal successors, (7887), 3363 states have internal predecessors, (7887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3364 states to 3364 states and 7887 transitions. [2021-08-06 15:06:20,021 INFO L78 Accepts]: Start accepts. Automaton has 3364 states and 7887 transitions. Word has length 57 [2021-08-06 15:06:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:06:20,021 INFO L470 AbstractCegarLoop]: Abstraction has 3364 states and 7887 transitions. [2021-08-06 15:06:20,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:20,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3364 states and 7887 transitions. [2021-08-06 15:06:20,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 15:06:20,023 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:06:20,023 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:06:20,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-06 15:06:20,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:20,224 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:06:20,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:06:20,224 INFO L82 PathProgramCache]: Analyzing trace with hash -880443627, now seen corresponding path program 88 times [2021-08-06 15:06:20,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:06:20,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80951766] [2021-08-06 15:06:20,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:06:20,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:06:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:20,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:06:20,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80951766] [2021-08-06 15:06:20,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80951766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:20,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401483493] [2021-08-06 15:06:20,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:06:20,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:20,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:06:20,468 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:06:20,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 15:06:24,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:06:24,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:06:24,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 15:06:24,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:06:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:26,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401483493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:26,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:06:26,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26] total 39 [2021-08-06 15:06:26,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850349441] [2021-08-06 15:06:26,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-06 15:06:26,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:06:26,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-06 15:06:26,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1236, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:06:26,128 INFO L87 Difference]: Start difference. First operand 3364 states and 7887 transitions. Second operand has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:31,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:06:31,381 INFO L93 Difference]: Finished difference Result 4870 states and 10847 transitions. [2021-08-06 15:06:31,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-08-06 15:06:31,381 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 15:06:31,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:06:31,386 INFO L225 Difference]: With dead ends: 4870 [2021-08-06 15:06:31,386 INFO L226 Difference]: Without dead ends: 4866 [2021-08-06 15:06:31,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17310 ImplicationChecksByTransitivity, 4997.3ms TimeCoverageRelationStatistics Valid=9852, Invalid=32378, Unknown=0, NotChecked=0, Total=42230 [2021-08-06 15:06:31,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-08-06 15:06:31,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 3364. [2021-08-06 15:06:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3364 states, 3363 states have (on average 2.344930121914957) internal successors, (7886), 3363 states have internal predecessors, (7886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3364 states to 3364 states and 7886 transitions. [2021-08-06 15:06:31,425 INFO L78 Accepts]: Start accepts. Automaton has 3364 states and 7886 transitions. Word has length 57 [2021-08-06 15:06:31,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:06:31,425 INFO L470 AbstractCegarLoop]: Abstraction has 3364 states and 7886 transitions. [2021-08-06 15:06:31,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:31,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3364 states and 7886 transitions. [2021-08-06 15:06:31,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 15:06:31,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:06:31,427 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:06:31,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 15:06:31,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-06 15:06:31,628 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:06:31,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:06:31,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1257305323, now seen corresponding path program 89 times [2021-08-06 15:06:31,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:06:31,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897576322] [2021-08-06 15:06:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:06:31,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:06:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 81 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:06:31,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:06:31,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897576322] [2021-08-06 15:06:31,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897576322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:31,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015814692] [2021-08-06 15:06:31,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:06:31,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:31,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:06:31,861 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:06:31,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 15:06:36,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-08-06 15:06:36,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:06:36,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-06 15:06:36,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:06:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:37,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015814692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:37,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:06:37,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26] total 40 [2021-08-06 15:06:37,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875094947] [2021-08-06 15:06:37,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:06:37,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:06:37,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:06:37,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:06:37,643 INFO L87 Difference]: Start difference. First operand 3364 states and 7886 transitions. Second operand has 41 states, 41 states have (on average 2.658536585365854) internal successors, (109), 40 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:40,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:06:40,912 INFO L93 Difference]: Finished difference Result 8997 states and 20267 transitions. [2021-08-06 15:06:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-06 15:06:40,912 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.658536585365854) internal successors, (109), 40 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 15:06:40,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:06:40,924 INFO L225 Difference]: With dead ends: 8997 [2021-08-06 15:06:40,924 INFO L226 Difference]: Without dead ends: 8988 [2021-08-06 15:06:40,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4334 ImplicationChecksByTransitivity, 2502.4ms TimeCoverageRelationStatistics Valid=2464, Invalid=12298, Unknown=0, NotChecked=0, Total=14762 [2021-08-06 15:06:40,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8988 states. [2021-08-06 15:06:41,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8988 to 6139. [2021-08-06 15:06:41,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6139 states, 6138 states have (on average 2.388400130335614) internal successors, (14660), 6138 states have internal predecessors, (14660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6139 states to 6139 states and 14660 transitions. [2021-08-06 15:06:41,016 INFO L78 Accepts]: Start accepts. Automaton has 6139 states and 14660 transitions. Word has length 57 [2021-08-06 15:06:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:06:41,016 INFO L470 AbstractCegarLoop]: Abstraction has 6139 states and 14660 transitions. [2021-08-06 15:06:41,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.658536585365854) internal successors, (109), 40 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 6139 states and 14660 transitions. [2021-08-06 15:06:41,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-06 15:06:41,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:06:41,021 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:06:41,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-06 15:06:41,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:41,221 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:06:41,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:06:41,222 INFO L82 PathProgramCache]: Analyzing trace with hash -588351939, now seen corresponding path program 90 times [2021-08-06 15:06:41,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:06:41,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196236545] [2021-08-06 15:06:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:06:41,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:06:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 1 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:41,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:06:41,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196236545] [2021-08-06 15:06:41,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196236545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:41,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924422211] [2021-08-06 15:06:41,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:06:41,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:41,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:06:41,473 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:06:41,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 15:06:46,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-06 15:06:46,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:06:46,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 15:06:46,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:06:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 64 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:46,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924422211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:46,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:06:46,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 25 [2021-08-06 15:06:46,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118570157] [2021-08-06 15:06:46,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:06:46,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:06:46,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:06:46,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:06:46,745 INFO L87 Difference]: Start difference. First operand 6139 states and 14660 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 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) [2021-08-06 15:06:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:06:47,047 INFO L93 Difference]: Finished difference Result 7799 states and 18454 transitions. [2021-08-06 15:06:47,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:06:47,047 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 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 59 [2021-08-06 15:06:47,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:06:47,058 INFO L225 Difference]: With dead ends: 7799 [2021-08-06 15:06:47,058 INFO L226 Difference]: Without dead ends: 7709 [2021-08-06 15:06:47,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 310.0ms TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:06:47,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7709 states. [2021-08-06 15:06:47,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7709 to 6749. [2021-08-06 15:06:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6749 states, 6748 states have (on average 2.4058980438648487) internal successors, (16235), 6748 states have internal predecessors, (16235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:47,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 16235 transitions. [2021-08-06 15:06:47,156 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 16235 transitions. Word has length 59 [2021-08-06 15:06:47,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:06:47,156 INFO L470 AbstractCegarLoop]: Abstraction has 6749 states and 16235 transitions. [2021-08-06 15:06:47,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 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) [2021-08-06 15:06:47,156 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 16235 transitions. [2021-08-06 15:06:47,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-06 15:06:47,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:06:47,162 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:06:47,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-06 15:06:47,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:47,362 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:06:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:06:47,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1256771773, now seen corresponding path program 91 times [2021-08-06 15:06:47,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:06:47,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138834014] [2021-08-06 15:06:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:06:47,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:06:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:47,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:06:47,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138834014] [2021-08-06 15:06:47,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138834014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:47,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325833135] [2021-08-06 15:06:47,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:06:47,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:47,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:06:47,761 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:06:47,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 15:06:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:52,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2021-08-06 15:06:52,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:06:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:53,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325833135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:53,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:06:53,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28] total 44 [2021-08-06 15:06:53,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182835473] [2021-08-06 15:06:53,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-06 15:06:53,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:06:53,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-06 15:06:53,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1776, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:06:53,883 INFO L87 Difference]: Start difference. First operand 6749 states and 16235 transitions. Second operand has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:07:00,415 INFO L93 Difference]: Finished difference Result 9562 states and 22012 transitions. [2021-08-06 15:07:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-08-06 15:07:00,416 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-06 15:07:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:07:00,430 INFO L225 Difference]: With dead ends: 9562 [2021-08-06 15:07:00,431 INFO L226 Difference]: Without dead ends: 9558 [2021-08-06 15:07:00,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7358 ImplicationChecksByTransitivity, 4047.7ms TimeCoverageRelationStatistics Valid=1943, Invalid=21619, Unknown=0, NotChecked=0, Total=23562 [2021-08-06 15:07:00,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9558 states. [2021-08-06 15:07:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9558 to 6730. [2021-08-06 15:07:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6730 states, 6729 states have (on average 2.4135829989597264) internal successors, (16241), 6729 states have internal predecessors, (16241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:00,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6730 states to 6730 states and 16241 transitions. [2021-08-06 15:07:00,558 INFO L78 Accepts]: Start accepts. Automaton has 6730 states and 16241 transitions. Word has length 59 [2021-08-06 15:07:00,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:07:00,558 INFO L470 AbstractCegarLoop]: Abstraction has 6730 states and 16241 transitions. [2021-08-06 15:07:00,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:00,559 INFO L276 IsEmpty]: Start isEmpty. Operand 6730 states and 16241 transitions. [2021-08-06 15:07:00,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-06 15:07:00,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:07:00,581 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:07:00,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 15:07:00,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:07:00,794 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:07:00,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:07:00,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1300336407, now seen corresponding path program 92 times [2021-08-06 15:07:00,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:07:00,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002557743] [2021-08-06 15:07:00,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:07:00,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:07:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:07:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:01,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:07:01,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002557743] [2021-08-06 15:07:01,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002557743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:01,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756947207] [2021-08-06 15:07:01,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:07:01,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:07:01,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:07:01,258 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:07:01,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 15:07:05,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:07:05,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:07:05,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-06 15:07:05,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:07:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:07,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756947207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:07,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:07:07,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2021-08-06 15:07:07,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913693912] [2021-08-06 15:07:07,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-06 15:07:07,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:07:07,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-06 15:07:07,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:07:07,389 INFO L87 Difference]: Start difference. First operand 6730 states and 16241 transitions. Second operand has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:16,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:07:16,101 INFO L93 Difference]: Finished difference Result 14753 states and 32967 transitions. [2021-08-06 15:07:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-08-06 15:07:16,101 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-06 15:07:16,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:07:16,120 INFO L225 Difference]: With dead ends: 14753 [2021-08-06 15:07:16,121 INFO L226 Difference]: Without dead ends: 14705 [2021-08-06 15:07:16,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17389 ImplicationChecksByTransitivity, 5625.0ms TimeCoverageRelationStatistics Valid=4375, Invalid=43805, Unknown=0, NotChecked=0, Total=48180 [2021-08-06 15:07:16,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14705 states. [2021-08-06 15:07:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14705 to 6416. [2021-08-06 15:07:16,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6416 states, 6415 states have (on average 2.4120031176929073) internal successors, (15473), 6415 states have internal predecessors, (15473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:16,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 15473 transitions. [2021-08-06 15:07:16,274 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 15473 transitions. Word has length 59 [2021-08-06 15:07:16,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:07:16,274 INFO L470 AbstractCegarLoop]: Abstraction has 6416 states and 15473 transitions. [2021-08-06 15:07:16,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:16,274 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 15473 transitions. [2021-08-06 15:07:16,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-06 15:07:16,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:07:16,279 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:07:16,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-06 15:07:16,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:07:16,480 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:07:16,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:07:16,480 INFO L82 PathProgramCache]: Analyzing trace with hash 87964315, now seen corresponding path program 93 times [2021-08-06 15:07:16,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:07:16,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572489128] [2021-08-06 15:07:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:07:16,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:07:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:07:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:16,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:07:16,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572489128] [2021-08-06 15:07:16,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572489128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:16,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795644612] [2021-08-06 15:07:16,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:07:16,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:07:16,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:07:16,933 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:07:16,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 15:07:21,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-08-06 15:07:21,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:07:21,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-06 15:07:21,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:07:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:23,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795644612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:23,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:07:23,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27] total 47 [2021-08-06 15:07:23,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098098110] [2021-08-06 15:07:23,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-06 15:07:23,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:07:23,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-06 15:07:23,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2020, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:07:23,188 INFO L87 Difference]: Start difference. First operand 6416 states and 15473 transitions. Second operand has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:33,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:07:33,362 INFO L93 Difference]: Finished difference Result 16765 states and 37179 transitions. [2021-08-06 15:07:33,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2021-08-06 15:07:33,363 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-06 15:07:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:07:33,384 INFO L225 Difference]: With dead ends: 16765 [2021-08-06 15:07:33,384 INFO L226 Difference]: Without dead ends: 16687 [2021-08-06 15:07:33,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22172 ImplicationChecksByTransitivity, 6532.5ms TimeCoverageRelationStatistics Valid=6045, Invalid=53247, Unknown=0, NotChecked=0, Total=59292 [2021-08-06 15:07:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16687 states. [2021-08-06 15:07:33,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16687 to 6386. [2021-08-06 15:07:33,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6386 states, 6385 states have (on average 2.4117462803445577) internal successors, (15399), 6385 states have internal predecessors, (15399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 15399 transitions. [2021-08-06 15:07:33,543 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 15399 transitions. Word has length 59 [2021-08-06 15:07:33,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:07:33,543 INFO L470 AbstractCegarLoop]: Abstraction has 6386 states and 15399 transitions. [2021-08-06 15:07:33,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:33,543 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 15399 transitions. [2021-08-06 15:07:33,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-06 15:07:33,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:07:33,549 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:07:33,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 15:07:33,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:07:33,749 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:07:33,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:07:33,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1460736799, now seen corresponding path program 94 times [2021-08-06 15:07:33,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:07:33,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490536484] [2021-08-06 15:07:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:07:33,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:07:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:07:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:34,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:07:34,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490536484] [2021-08-06 15:07:34,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490536484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:34,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067773657] [2021-08-06 15:07:34,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:07:34,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:07:34,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:07:34,253 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:07:34,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 15:07:39,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:07:39,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:07:39,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-06 15:07:39,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:07:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:40,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067773657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:40,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:07:40,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27] total 48 [2021-08-06 15:07:40,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669603901] [2021-08-06 15:07:40,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-06 15:07:40,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:07:40,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-06 15:07:40,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=2097, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:07:40,617 INFO L87 Difference]: Start difference. First operand 6386 states and 15399 transitions. Second operand has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 48 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:49,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:07:49,988 INFO L93 Difference]: Finished difference Result 19207 states and 42385 transitions. [2021-08-06 15:07:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-08-06 15:07:49,989 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 48 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-06 15:07:49,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:07:50,018 INFO L225 Difference]: With dead ends: 19207 [2021-08-06 15:07:50,018 INFO L226 Difference]: Without dead ends: 19093 [2021-08-06 15:07:50,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22463 ImplicationChecksByTransitivity, 6366.7ms TimeCoverageRelationStatistics Valid=6948, Invalid=52344, Unknown=0, NotChecked=0, Total=59292 [2021-08-06 15:07:50,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19093 states. [2021-08-06 15:07:50,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19093 to 6320. [2021-08-06 15:07:50,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6320 states, 6319 states have (on average 2.413831302421269) internal successors, (15253), 6319 states have internal predecessors, (15253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6320 states to 6320 states and 15253 transitions. [2021-08-06 15:07:50,151 INFO L78 Accepts]: Start accepts. Automaton has 6320 states and 15253 transitions. Word has length 59 [2021-08-06 15:07:50,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:07:50,151 INFO L470 AbstractCegarLoop]: Abstraction has 6320 states and 15253 transitions. [2021-08-06 15:07:50,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 48 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:50,152 INFO L276 IsEmpty]: Start isEmpty. Operand 6320 states and 15253 transitions. [2021-08-06 15:07:50,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-06 15:07:50,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:07:50,157 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:07:50,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 15:07:50,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-08-06 15:07:50,357 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:07:50,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:07:50,358 INFO L82 PathProgramCache]: Analyzing trace with hash 2020858019, now seen corresponding path program 95 times [2021-08-06 15:07:50,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:07:50,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104308655] [2021-08-06 15:07:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:07:50,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:07:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:07:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 20 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:50,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:07:50,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104308655] [2021-08-06 15:07:50,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104308655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:50,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624880937] [2021-08-06 15:07:50,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:07:50,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:07:50,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:07:50,836 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:07:50,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 15:07:55,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-08-06 15:07:55,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:07:55,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-06 15:07:55,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:07:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 20 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:57,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624880937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:57,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:07:57,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 50 [2021-08-06 15:07:57,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609703220] [2021-08-06 15:07:57,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-06 15:07:57,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:07:57,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-06 15:07:57,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2259, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:07:57,109 INFO L87 Difference]: Start difference. First operand 6320 states and 15253 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:08:03,799 INFO L93 Difference]: Finished difference Result 21738 states and 47694 transitions. [2021-08-06 15:08:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-08-06 15:08:03,800 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-06 15:08:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:08:03,829 INFO L225 Difference]: With dead ends: 21738 [2021-08-06 15:08:03,829 INFO L226 Difference]: Without dead ends: 21435 [2021-08-06 15:08:03,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17294 ImplicationChecksByTransitivity, 5207.3ms TimeCoverageRelationStatistics Valid=6385, Invalid=38771, Unknown=0, NotChecked=0, Total=45156 [2021-08-06 15:08:03,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21435 states. [2021-08-06 15:08:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21435 to 6312. [2021-08-06 15:08:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6312 states, 6311 states have (on average 2.4143558865472983) internal successors, (15237), 6311 states have internal predecessors, (15237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:04,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6312 states to 6312 states and 15237 transitions. [2021-08-06 15:08:04,015 INFO L78 Accepts]: Start accepts. Automaton has 6312 states and 15237 transitions. Word has length 59 [2021-08-06 15:08:04,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:08:04,015 INFO L470 AbstractCegarLoop]: Abstraction has 6312 states and 15237 transitions. [2021-08-06 15:08:04,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:04,015 INFO L276 IsEmpty]: Start isEmpty. Operand 6312 states and 15237 transitions. [2021-08-06 15:08:04,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-06 15:08:04,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:08:04,021 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:08:04,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-06 15:08:04,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-06 15:08:04,222 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:08:04,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:08:04,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1762637017, now seen corresponding path program 96 times [2021-08-06 15:08:04,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:08:04,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115566780] [2021-08-06 15:08:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:08:04,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:08:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:08:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 30 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:04,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:08:04,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115566780] [2021-08-06 15:08:04,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115566780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:04,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729497012] [2021-08-06 15:08:04,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:08:04,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:08:04,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:08:04,770 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:08:04,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 15:08:10,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-08-06 15:08:10,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:08:10,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-06 15:08:10,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:08:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 30 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:11,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729497012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:11,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:08:11,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2021-08-06 15:08:11,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26064343] [2021-08-06 15:08:11,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-06 15:08:11,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:08:11,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-06 15:08:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:08:11,514 INFO L87 Difference]: Start difference. First operand 6312 states and 15237 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:17,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:08:17,447 INFO L93 Difference]: Finished difference Result 23651 states and 51796 transitions. [2021-08-06 15:08:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-08-06 15:08:17,448 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-06 15:08:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:08:17,485 INFO L225 Difference]: With dead ends: 23651 [2021-08-06 15:08:17,485 INFO L226 Difference]: Without dead ends: 23225 [2021-08-06 15:08:17,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14276 ImplicationChecksByTransitivity, 4570.2ms TimeCoverageRelationStatistics Valid=5883, Invalid=32337, Unknown=0, NotChecked=0, Total=38220 [2021-08-06 15:08:17,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23225 states. [2021-08-06 15:08:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23225 to 6344. [2021-08-06 15:08:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6344 states, 6343 states have (on average 2.412265489516002) internal successors, (15301), 6343 states have internal predecessors, (15301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6344 states to 6344 states and 15301 transitions. [2021-08-06 15:08:17,648 INFO L78 Accepts]: Start accepts. Automaton has 6344 states and 15301 transitions. Word has length 59 [2021-08-06 15:08:17,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:08:17,648 INFO L470 AbstractCegarLoop]: Abstraction has 6344 states and 15301 transitions. [2021-08-06 15:08:17,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:17,648 INFO L276 IsEmpty]: Start isEmpty. Operand 6344 states and 15301 transitions. [2021-08-06 15:08:17,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-06 15:08:17,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:08:17,653 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:08:17,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-06 15:08:17,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:08:17,854 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:08:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:08:17,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1411394219, now seen corresponding path program 97 times [2021-08-06 15:08:17,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:08:17,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657046414] [2021-08-06 15:08:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:08:17,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:08:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:08:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 42 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:18,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:08:18,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657046414] [2021-08-06 15:08:18,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657046414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:18,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221711002] [2021-08-06 15:08:18,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:08:18,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:08:18,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:08:18,237 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:08:18,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 15:08:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:08:23,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-06 15:08:23,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:08:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 42 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:24,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221711002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:24,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:08:24,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 52 [2021-08-06 15:08:24,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004887936] [2021-08-06 15:08:24,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-06 15:08:24,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:08:24,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-06 15:08:24,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=2407, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:08:24,942 INFO L87 Difference]: Start difference. First operand 6344 states and 15301 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:31,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:08:31,286 INFO L93 Difference]: Finished difference Result 23260 states and 50663 transitions. [2021-08-06 15:08:31,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-08-06 15:08:31,286 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-06 15:08:31,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:08:31,319 INFO L225 Difference]: With dead ends: 23260 [2021-08-06 15:08:31,319 INFO L226 Difference]: Without dead ends: 22666 [2021-08-06 15:08:31,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19455 ImplicationChecksByTransitivity, 5330.9ms TimeCoverageRelationStatistics Valid=8761, Invalid=41191, Unknown=0, NotChecked=0, Total=49952 [2021-08-06 15:08:31,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22666 states. [2021-08-06 15:08:31,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22666 to 6368. [2021-08-06 15:08:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6368 states, 6367 states have (on average 2.4107114810742893) internal successors, (15349), 6367 states have internal predecessors, (15349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6368 states to 6368 states and 15349 transitions. [2021-08-06 15:08:31,496 INFO L78 Accepts]: Start accepts. Automaton has 6368 states and 15349 transitions. Word has length 59 [2021-08-06 15:08:31,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:08:31,496 INFO L470 AbstractCegarLoop]: Abstraction has 6368 states and 15349 transitions. [2021-08-06 15:08:31,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:31,496 INFO L276 IsEmpty]: Start isEmpty. Operand 6368 states and 15349 transitions. [2021-08-06 15:08:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-06 15:08:31,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:08:31,501 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:08:31,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-06 15:08:31,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:08:31,702 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:08:31,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:08:31,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1101870895, now seen corresponding path program 98 times [2021-08-06 15:08:31,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:08:31,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036725181] [2021-08-06 15:08:31,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:08:31,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:08:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:08:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:32,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:08:32,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036725181] [2021-08-06 15:08:32,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036725181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:32,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855956593] [2021-08-06 15:08:32,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:08:32,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:08:32,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:08:32,192 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:08:32,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 15:08:37,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:08:37,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:08:37,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:08:37,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:08:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:38,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855956593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:38,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:08:38,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-08-06 15:08:38,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123660894] [2021-08-06 15:08:38,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-06 15:08:38,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:08:38,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-06 15:08:38,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=2390, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:08:38,850 INFO L87 Difference]: Start difference. First operand 6368 states and 15349 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:44,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:08:44,884 INFO L93 Difference]: Finished difference Result 22353 states and 48544 transitions. [2021-08-06 15:08:44,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-08-06 15:08:44,885 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-06 15:08:44,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:08:44,916 INFO L225 Difference]: With dead ends: 22353 [2021-08-06 15:08:44,916 INFO L226 Difference]: Without dead ends: 21603 [2021-08-06 15:08:44,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19181 ImplicationChecksByTransitivity, 5090.8ms TimeCoverageRelationStatistics Valid=9582, Invalid=40370, Unknown=0, NotChecked=0, Total=49952 [2021-08-06 15:08:44,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21603 states. [2021-08-06 15:08:45,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21603 to 7176. [2021-08-06 15:08:45,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7175 states have (on average 2.399581881533101) internal successors, (17217), 7175 states have internal predecessors, (17217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:45,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 17217 transitions. [2021-08-06 15:08:45,083 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 17217 transitions. Word has length 59 [2021-08-06 15:08:45,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:08:45,083 INFO L470 AbstractCegarLoop]: Abstraction has 7176 states and 17217 transitions. [2021-08-06 15:08:45,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:45,083 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 17217 transitions. [2021-08-06 15:08:45,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-06 15:08:45,089 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:08:45,089 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:08:45,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-06 15:08:45,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-06 15:08:45,290 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:08:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:08:45,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1565601971, now seen corresponding path program 99 times [2021-08-06 15:08:45,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:08:45,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330017035] [2021-08-06 15:08:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:08:45,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:08:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:08:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:45,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:08:45,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330017035] [2021-08-06 15:08:45,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330017035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:45,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681043340] [2021-08-06 15:08:45,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:08:45,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:08:45,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:08:45,785 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:08:45,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 15:08:51,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-06 15:08:51,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:08:51,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:08:51,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:08:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:52,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681043340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:52,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:08:52,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-08-06 15:08:52,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051363749] [2021-08-06 15:08:52,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-06 15:08:52,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:08:52,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-06 15:08:52,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=2454, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 15:08:52,603 INFO L87 Difference]: Start difference. First operand 7176 states and 17217 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:08:58,888 INFO L93 Difference]: Finished difference Result 19012 states and 41884 transitions. [2021-08-06 15:08:58,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-08-06 15:08:58,889 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-06 15:08:58,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:08:58,916 INFO L225 Difference]: With dead ends: 19012 [2021-08-06 15:08:58,917 INFO L226 Difference]: Without dead ends: 18139 [2021-08-06 15:08:58,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18126 ImplicationChecksByTransitivity, 5495.3ms TimeCoverageRelationStatistics Valid=10369, Invalid=38693, Unknown=0, NotChecked=0, Total=49062 [2021-08-06 15:08:58,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18139 states. [2021-08-06 15:08:59,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18139 to 7066. [2021-08-06 15:08:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7066 states, 7065 states have (on average 2.3869780608634112) internal successors, (16864), 7065 states have internal predecessors, (16864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:59,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7066 states to 7066 states and 16864 transitions. [2021-08-06 15:08:59,059 INFO L78 Accepts]: Start accepts. Automaton has 7066 states and 16864 transitions. Word has length 59 [2021-08-06 15:08:59,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:08:59,059 INFO L470 AbstractCegarLoop]: Abstraction has 7066 states and 16864 transitions. [2021-08-06 15:08:59,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:59,059 INFO L276 IsEmpty]: Start isEmpty. Operand 7066 states and 16864 transitions. [2021-08-06 15:08:59,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-06 15:08:59,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:08:59,065 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:08:59,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 15:08:59,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:08:59,265 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:08:59,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:08:59,265 INFO L82 PathProgramCache]: Analyzing trace with hash -712953915, now seen corresponding path program 100 times [2021-08-06 15:08:59,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:08:59,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826453529] [2021-08-06 15:08:59,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:08:59,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:08:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:08:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 102 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:59,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:08:59,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826453529] [2021-08-06 15:08:59,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826453529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:59,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929197627] [2021-08-06 15:08:59,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:08:59,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:08:59,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:08:59,651 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:08:59,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 15:09:05,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:09:05,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:09:05,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 15:09:05,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:09:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 102 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:06,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929197627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:06,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:09:06,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28] total 43 [2021-08-06 15:09:06,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53171684] [2021-08-06 15:09:06,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 15:09:06,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:09:06,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 15:09:06,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:09:06,683 INFO L87 Difference]: Start difference. First operand 7066 states and 16864 transitions. Second operand has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:17,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:09:17,040 INFO L93 Difference]: Finished difference Result 14670 states and 32855 transitions. [2021-08-06 15:09:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2021-08-06 15:09:17,040 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-06 15:09:17,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:09:17,061 INFO L225 Difference]: With dead ends: 14670 [2021-08-06 15:09:17,061 INFO L226 Difference]: Without dead ends: 14666 [2021-08-06 15:09:17,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46972 ImplicationChecksByTransitivity, 9400.2ms TimeCoverageRelationStatistics Valid=21531, Invalid=80549, Unknown=0, NotChecked=0, Total=102080 [2021-08-06 15:09:17,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14666 states. [2021-08-06 15:09:17,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14666 to 7547. [2021-08-06 15:09:17,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7547 states, 7546 states have (on average 2.4033925258415056) internal successors, (18136), 7546 states have internal predecessors, (18136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7547 states to 7547 states and 18136 transitions. [2021-08-06 15:09:17,251 INFO L78 Accepts]: Start accepts. Automaton has 7547 states and 18136 transitions. Word has length 59 [2021-08-06 15:09:17,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:09:17,251 INFO L470 AbstractCegarLoop]: Abstraction has 7547 states and 18136 transitions. [2021-08-06 15:09:17,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:17,251 INFO L276 IsEmpty]: Start isEmpty. Operand 7547 states and 18136 transitions. [2021-08-06 15:09:17,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-06 15:09:17,258 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:09:17,258 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:09:17,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-06 15:09:17,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:09:17,459 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:09:17,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:09:17,459 INFO L82 PathProgramCache]: Analyzing trace with hash 218506875, now seen corresponding path program 101 times [2021-08-06 15:09:17,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:09:17,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010674612] [2021-08-06 15:09:17,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:09:17,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:09:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:09:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:17,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:09:17,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010674612] [2021-08-06 15:09:17,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010674612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:17,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659423477] [2021-08-06 15:09:17,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:09:17,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:09:17,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:09:17,975 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:09:17,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 15:09:23,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-08-06 15:09:23,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:09:23,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-06 15:09:23,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:09:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:24,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659423477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:24,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:09:24,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 55 [2021-08-06 15:09:24,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935031193] [2021-08-06 15:09:24,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-08-06 15:09:24,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:09:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-08-06 15:09:24,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=2528, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 15:09:24,906 INFO L87 Difference]: Start difference. First operand 7547 states and 18136 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:32,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:09:32,454 INFO L93 Difference]: Finished difference Result 10905 states and 24996 transitions. [2021-08-06 15:09:32,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-08-06 15:09:32,455 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-06 15:09:32,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:09:32,468 INFO L225 Difference]: With dead ends: 10905 [2021-08-06 15:09:32,468 INFO L226 Difference]: Without dead ends: 10428 [2021-08-06 15:09:32,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24679 ImplicationChecksByTransitivity, 6598.6ms TimeCoverageRelationStatistics Valid=16440, Invalid=45312, Unknown=0, NotChecked=0, Total=61752 [2021-08-06 15:09:32,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10428 states. [2021-08-06 15:09:32,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10428 to 7416. [2021-08-06 15:09:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7416 states, 7415 states have (on average 2.3995954146999328) internal successors, (17793), 7415 states have internal predecessors, (17793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 17793 transitions. [2021-08-06 15:09:32,572 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 17793 transitions. Word has length 61 [2021-08-06 15:09:32,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:09:32,572 INFO L470 AbstractCegarLoop]: Abstraction has 7416 states and 17793 transitions. [2021-08-06 15:09:32,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:32,572 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 17793 transitions. [2021-08-06 15:09:32,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-06 15:09:32,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:09:32,578 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:09:32,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-06 15:09:32,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 15:09:32,780 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:09:32,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:09:32,780 INFO L82 PathProgramCache]: Analyzing trace with hash 970555797, now seen corresponding path program 102 times [2021-08-06 15:09:32,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:09:32,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974046106] [2021-08-06 15:09:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:09:32,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:09:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:09:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:33,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:09:33,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974046106] [2021-08-06 15:09:33,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974046106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:33,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270137195] [2021-08-06 15:09:33,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:09:33,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:09:33,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:09:33,039 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:09:33,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 15:09:38,653 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 15:09:38,653 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 15:09:38,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-08-06 15:09:38,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:09:38,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-06 15:09:38,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:09:38,736 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-08-06 15:09:38,738 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 15:09:38,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 15:09:38,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 15:09:38,939 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 62 with TraceHistMax 12,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. [2021-08-06 15:09:38,940 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 15:09:38,940 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 15:09:38,943 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 15:09:38,943 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 15:09:38,945 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 03:09:38 BasicIcfg [2021-08-06 15:09:38,945 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 15:09:38,945 INFO L168 Benchmark]: Toolchain (without parser) took 704699.85 ms. Allocated memory was 199.2 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 180.2 MB in the beginning and 2.0 GB in the end (delta: -1.8 GB). Peak memory consumption was 564.7 MB. Max. memory is 8.0 GB. [2021-08-06 15:09:38,945 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 199.2 MB. Free memory is still 181.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:09:38,945 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.69 ms. Allocated memory is still 199.2 MB. Free memory was 180.2 MB in the beginning and 178.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 15:09:38,945 INFO L168 Benchmark]: Boogie Preprocessor took 12.66 ms. Allocated memory is still 199.2 MB. Free memory was 178.7 MB in the beginning and 177.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:09:38,945 INFO L168 Benchmark]: RCFGBuilder took 215.33 ms. Allocated memory is still 199.2 MB. Free memory was 177.7 MB in the beginning and 166.2 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-06 15:09:38,945 INFO L168 Benchmark]: TraceAbstraction took 704440.12 ms. Allocated memory was 199.2 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 165.7 MB in the beginning and 2.0 GB in the end (delta: -1.8 GB). Peak memory consumption was 549.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:09:38,946 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 0.12 ms. Allocated memory is still 199.2 MB. Free memory is still 181.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.69 ms. Allocated memory is still 199.2 MB. Free memory was 180.2 MB in the beginning and 178.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.66 ms. Allocated memory is still 199.2 MB. Free memory was 178.7 MB in the beginning and 177.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 215.33 ms. Allocated memory is still 199.2 MB. Free memory was 177.7 MB in the beginning and 166.2 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 704440.12 ms. Allocated memory was 199.2 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 165.7 MB in the beginning and 2.0 GB in the end (delta: -1.8 GB). Peak memory consumption was 549.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 62 with TraceHistMax 12,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 62 with TraceHistMax 12,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 62 with TraceHistMax 12,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 704368.6ms, OverallIterations: 104, TraceHistogramMax: 12, EmptinessCheckTime: 326.3ms, AutomataDifference: 328243.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 37.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5411 SDtfs, 42383 SDslu, 75668 SDs, 0 SdLazy, 204289 SolverSat, 12676 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 78382.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15021 GetRequests, 3085 SyntacticMatches, 30 SemanticMatches, 11906 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729219 ImplicationChecksByTransitivity, 262012.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7547occurred in iteration=102, InterpolantAutomatonStates: 9326, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5688.1ms AutomataMinimizationTime, 103 MinimizatonAttempts, 386960 StatesRemovedByMinimization, 103 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 404.2ms SsaConstructionTime, 2302.8ms SatisfiabilityAnalysisTime, 115600.4ms InterpolantComputationTime, 8834 NumberOfCodeBlocks, 8834 NumberOfCodeBlocksAsserted, 652 NumberOfCheckSat, 8630 ConstructedInterpolants, 0 QuantifiedInterpolants, 76184 SizeOfPredicates, 375 NumberOfNonLiveVariables, 10144 ConjunctsInSsa, 3585 ConjunctsInUnsatCore, 204 InterpolantComputations, 2 PerfectInterpolantSequences, 4580/24015 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown