/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 18:38:13,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 18:38:13,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 18:38:13,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 18:38:13,519 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 [2022-03-01 18:38:13,542 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 18:38:13,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 18:38:13,542 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 18:38:13,542 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 18:38:13,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 18:38:13,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 18:38:13,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 18:38:13,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 18:38:13,549 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 18:38:13,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 18:38:13,550 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 18:38:13,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 18:38:13,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 18:38:13,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 18:38:13,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 18:38:13,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 18:38:13,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 18:38:13,551 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 18:38:13,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 18:38:13,551 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 18:38:13,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 18:38:13,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 18:38:13,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 18:38:13,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 18:38:13,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 18:38:13,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:38:13,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 18:38:13,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 18:38:13,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 18:38:13,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 18:38:13,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 18:38:13,553 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 18:38:13,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 18:38:13,553 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 18:38:13,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 18:38:13,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 18:38:13,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 18:38:13,755 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 18:38:13,757 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 18:38:13,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl [2022-03-01 18:38:13,758 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl' [2022-03-01 18:38:13,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 18:38:13,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 18:38:13,785 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 18:38:13,785 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 18:38:13,785 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 18:38:13,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:38:13" (1/1) ... [2022-03-01 18:38:13,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:38:13" (1/1) ... [2022-03-01 18:38:13,805 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 18:38:13,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 18:38:13,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 18:38:13,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 18:38:13,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 18:38:13,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:38:13" (1/1) ... [2022-03-01 18:38:13,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:38:13" (1/1) ... [2022-03-01 18:38:13,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:38:13" (1/1) ... [2022-03-01 18:38:13,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:38:13" (1/1) ... [2022-03-01 18:38:13,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:38:13" (1/1) ... [2022-03-01 18:38:13,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:38:13" (1/1) ... [2022-03-01 18:38:13,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:38:13" (1/1) ... [2022-03-01 18:38:13,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 18:38:13,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 18:38:13,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 18:38:13,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 18:38:13,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:38:13" (1/1) ... [2022-03-01 18:38:13,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:38:13,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:13,838 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) [2022-03-01 18:38:13,843 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 [2022-03-01 18:38:13,873 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 18:38:13,874 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 18:38:13,874 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 18:38:13,874 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 18:38:13,874 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 18:38:13,874 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 18:38:13,874 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 18:38:13,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 18:38:13,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 18:38:13,875 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 18:38:13,912 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 18:38:13,913 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 18:38:13,963 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 18:38:13,975 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 18:38:13,976 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 18:38:13,977 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:38:13 BoogieIcfgContainer [2022-03-01 18:38:13,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 18:38:13,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 18:38:13,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 18:38:13,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 18:38:13,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:38:13" (1/2) ... [2022-03-01 18:38:13,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75780954 and model type nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 06:38:13, skipping insertion in model container [2022-03-01 18:38:13,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:38:13" (2/2) ... [2022-03-01 18:38:13,993 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-counter-alt2.wvr.bpl [2022-03-01 18:38:13,998 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 18:38:13,998 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 18:38:13,998 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 18:38:13,998 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 18:38:14,019 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-01 18:38:14,054 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 18:38:14,059 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 18:38:14,059 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-01 18:38:14,065 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2022-03-01 18:38:14,085 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) [2022-03-01 18:38:14,086 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) [2022-03-01 18:38:14,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 18:38:14,090 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:14,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:14,091 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:38:14,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:14,094 INFO L85 PathProgramCache]: Analyzing trace with hash -618238623, now seen corresponding path program 1 times [2022-03-01 18:38:14,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:14,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819416037] [2022-03-01 18:38:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:14,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:14,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:14,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819416037] [2022-03-01 18:38:14,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819416037] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:38:14,196 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:38:14,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:38:14,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402840956] [2022-03-01 18:38:14,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:38:14,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:38:14,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:14,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:38:14,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:38:14,219 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) [2022-03-01 18:38:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:14,271 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2022-03-01 18:38:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:38:14,273 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 [2022-03-01 18:38:14,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:14,278 INFO L225 Difference]: With dead ends: 43 [2022-03-01 18:38:14,278 INFO L226 Difference]: Without dead ends: 43 [2022-03-01 18:38:14,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:38:14,282 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:14,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:38:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-01 18:38:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-03-01 18:38:14,302 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) [2022-03-01 18:38:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2022-03-01 18:38:14,324 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2022-03-01 18:38:14,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:14,325 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2022-03-01 18:38:14,325 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) [2022-03-01 18:38:14,325 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2022-03-01 18:38:14,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 18:38:14,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:14,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:14,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 18:38:14,326 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:38:14,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:14,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1950061855, now seen corresponding path program 1 times [2022-03-01 18:38:14,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:14,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345050863] [2022-03-01 18:38:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:14,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:38:14,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:14,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345050863] [2022-03-01 18:38:14,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345050863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:38:14,430 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:38:14,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:38:14,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229648180] [2022-03-01 18:38:14,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:38:14,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:38:14,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:14,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:38:14,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:38:14,432 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) [2022-03-01 18:38:14,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:14,486 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2022-03-01 18:38:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:38:14,486 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 [2022-03-01 18:38:14,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:14,488 INFO L225 Difference]: With dead ends: 50 [2022-03-01 18:38:14,488 INFO L226 Difference]: Without dead ends: 50 [2022-03-01 18:38:14,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:38:14,489 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:14,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 27 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:38:14,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-01 18:38:14,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-03-01 18:38:14,495 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) [2022-03-01 18:38:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2022-03-01 18:38:14,496 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2022-03-01 18:38:14,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:14,496 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2022-03-01 18:38:14,496 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) [2022-03-01 18:38:14,496 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2022-03-01 18:38:14,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 18:38:14,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:14,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:14,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 18:38:14,498 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:38:14,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:14,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1007893021, now seen corresponding path program 1 times [2022-03-01 18:38:14,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:14,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779723911] [2022-03-01 18:38:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:14,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:14,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:14,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779723911] [2022-03-01 18:38:14,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779723911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:38:14,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677488794] [2022-03-01 18:38:14,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:14,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:14,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:14,716 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) [2022-03-01 18:38:14,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 18:38:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:14,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:38:14,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:38:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:15,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:38:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:15,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677488794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:38:15,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:38:15,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 18:38:15,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762723163] [2022-03-01 18:38:15,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:38:15,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:38:15,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:15,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:38:15,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:38:15,414 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:15,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:15,555 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2022-03-01 18:38:15,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 18:38:15,556 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 18:38:15,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:15,559 INFO L225 Difference]: With dead ends: 144 [2022-03-01 18:38:15,560 INFO L226 Difference]: Without dead ends: 113 [2022-03-01 18:38:15,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:38:15,562 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:15,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 113 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:38:15,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-01 18:38:15,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 55. [2022-03-01 18:38:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2022-03-01 18:38:15,578 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2022-03-01 18:38:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:15,578 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2022-03-01 18:38:15,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2022-03-01 18:38:15,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:38:15,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:15,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:15,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 18:38:15,779 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 [2022-03-01 18:38:15,780 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:38:15,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:15,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1821743003, now seen corresponding path program 2 times [2022-03-01 18:38:15,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:15,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73153466] [2022-03-01 18:38:15,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:15,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:15,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:15,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73153466] [2022-03-01 18:38:15,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73153466] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:38:15,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467476037] [2022-03-01 18:38:15,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:38:15,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:15,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:15,871 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) [2022-03-01 18:38:15,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 18:38:15,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:38:15,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:38:15,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:38:15,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:38:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:16,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:38:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:16,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467476037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:38:16,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:38:16,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-01 18:38:16,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87278548] [2022-03-01 18:38:16,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:38:16,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:38:16,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:16,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:38:16,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:38:16,143 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-03-01 18:38:16,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:16,478 INFO L93 Difference]: Finished difference Result 177 states and 328 transitions. [2022-03-01 18:38:16,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:38:16,479 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 21 [2022-03-01 18:38:16,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:16,480 INFO L225 Difference]: With dead ends: 177 [2022-03-01 18:38:16,480 INFO L226 Difference]: Without dead ends: 177 [2022-03-01 18:38:16,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:38:16,482 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 175 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:16,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 81 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:38:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-01 18:38:16,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 75. [2022-03-01 18:38:16,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:16,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2022-03-01 18:38:16,498 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 21 [2022-03-01 18:38:16,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:16,498 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2022-03-01 18:38:16,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-03-01 18:38:16,498 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2022-03-01 18:38:16,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:38:16,499 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:16,499 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:16,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 18:38:16,715 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 [2022-03-01 18:38:16,716 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:38:16,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:16,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2071555341, now seen corresponding path program 3 times [2022-03-01 18:38:16,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:16,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976207981] [2022-03-01 18:38:16,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:16,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:16,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:16,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976207981] [2022-03-01 18:38:16,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976207981] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:38:16,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11593437] [2022-03-01 18:38:16,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:38:16,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:16,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:16,790 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) [2022-03-01 18:38:16,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 18:38:16,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:38:16,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:38:16,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:38:16,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:38:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:16,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:38:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:17,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11593437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:38:17,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:38:17,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-01 18:38:17,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287227554] [2022-03-01 18:38:17,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:38:17,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:38:17,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:17,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:38:17,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:38:17,028 INFO L87 Difference]: Start difference. First operand 75 states and 149 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:17,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:17,271 INFO L93 Difference]: Finished difference Result 141 states and 267 transitions. [2022-03-01 18:38:17,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:38:17,271 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 18:38:17,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:17,272 INFO L225 Difference]: With dead ends: 141 [2022-03-01 18:38:17,272 INFO L226 Difference]: Without dead ends: 139 [2022-03-01 18:38:17,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:38:17,273 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 132 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:17,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 40 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:38:17,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-01 18:38:17,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 77. [2022-03-01 18:38:17,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:17,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2022-03-01 18:38:17,276 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 21 [2022-03-01 18:38:17,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:17,277 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2022-03-01 18:38:17,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:17,277 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2022-03-01 18:38:17,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 18:38:17,277 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:17,277 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:17,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-01 18:38:17,511 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 [2022-03-01 18:38:17,512 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:38:17,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:17,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1720260825, now seen corresponding path program 4 times [2022-03-01 18:38:17,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:17,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579462259] [2022-03-01 18:38:17,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:17,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:17,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:17,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579462259] [2022-03-01 18:38:17,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579462259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:38:17,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989872338] [2022-03-01 18:38:17,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:38:17,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:17,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:17,678 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) [2022-03-01 18:38:17,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:38:17,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:38:17,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:38:17,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:38:17,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 18:38:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:18,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:38:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:18,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989872338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:38:18,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:38:18,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-03-01 18:38:18,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606735960] [2022-03-01 18:38:18,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:38:18,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:38:18,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:18,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:38:18,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:38:18,406 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:19,270 INFO L93 Difference]: Finished difference Result 375 states and 737 transitions. [2022-03-01 18:38:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 18:38:19,271 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 18:38:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:19,272 INFO L225 Difference]: With dead ends: 375 [2022-03-01 18:38:19,272 INFO L226 Difference]: Without dead ends: 361 [2022-03-01 18:38:19,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=570, Invalid=1592, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:38:19,273 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 231 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:19,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 230 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 501 Invalid, 0 Unknown, 277 Unchecked, 0.3s Time] [2022-03-01 18:38:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-03-01 18:38:19,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 164. [2022-03-01 18:38:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.184049079754601) internal successors, (356), 163 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 356 transitions. [2022-03-01 18:38:19,279 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 356 transitions. Word has length 23 [2022-03-01 18:38:19,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:19,280 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 356 transitions. [2022-03-01 18:38:19,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:19,280 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 356 transitions. [2022-03-01 18:38:19,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 18:38:19,281 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:19,281 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:19,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 18:38:19,481 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 [2022-03-01 18:38:19,482 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:38:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:19,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1505995819, now seen corresponding path program 5 times [2022-03-01 18:38:19,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:19,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449356587] [2022-03-01 18:38:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:19,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:19,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:19,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449356587] [2022-03-01 18:38:19,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449356587] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:38:19,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990419411] [2022-03-01 18:38:19,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:38:19,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:19,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:19,685 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) [2022-03-01 18:38:19,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 18:38:19,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:38:19,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:38:19,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:38:19,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:38:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:20,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:38:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:20,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990419411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:38:20,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:38:20,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-03-01 18:38:20,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874243937] [2022-03-01 18:38:20,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:38:20,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:38:20,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:20,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:38:20,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:38:20,724 INFO L87 Difference]: Start difference. First operand 164 states and 356 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:22,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:22,529 INFO L93 Difference]: Finished difference Result 646 states and 1281 transitions. [2022-03-01 18:38:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:38:22,529 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 18:38:22,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:22,531 INFO L225 Difference]: With dead ends: 646 [2022-03-01 18:38:22,531 INFO L226 Difference]: Without dead ends: 591 [2022-03-01 18:38:22,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1042, Invalid=4070, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 18:38:22,533 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 396 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:22,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 236 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 718 Invalid, 0 Unknown, 222 Unchecked, 0.4s Time] [2022-03-01 18:38:22,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-03-01 18:38:22,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 206. [2022-03-01 18:38:22,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.229268292682927) internal successors, (457), 205 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 457 transitions. [2022-03-01 18:38:22,546 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 457 transitions. Word has length 23 [2022-03-01 18:38:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:22,546 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 457 transitions. [2022-03-01 18:38:22,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:22,547 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 457 transitions. [2022-03-01 18:38:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 18:38:22,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:22,548 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:22,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 18:38:22,771 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 [2022-03-01 18:38:22,773 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:38:22,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:22,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1378998987, now seen corresponding path program 6 times [2022-03-01 18:38:22,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:22,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095842130] [2022-03-01 18:38:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:22,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:22,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:22,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095842130] [2022-03-01 18:38:22,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095842130] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:38:22,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136541439] [2022-03-01 18:38:22,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:38:22,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:22,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:22,921 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) [2022-03-01 18:38:22,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 18:38:22,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:38:22,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:38:22,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:38:22,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:38:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:23,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:38:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:23,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136541439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:38:23,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:38:23,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-03-01 18:38:23,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114731475] [2022-03-01 18:38:23,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:38:23,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:38:23,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:23,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:38:23,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:38:23,942 INFO L87 Difference]: Start difference. First operand 206 states and 457 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:26,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:26,937 INFO L93 Difference]: Finished difference Result 782 states and 1564 transitions. [2022-03-01 18:38:26,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-01 18:38:26,937 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 18:38:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:26,941 INFO L225 Difference]: With dead ends: 782 [2022-03-01 18:38:26,941 INFO L226 Difference]: Without dead ends: 715 [2022-03-01 18:38:26,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3029 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1765, Invalid=6607, Unknown=0, NotChecked=0, Total=8372 [2022-03-01 18:38:26,943 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 497 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:26,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 225 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 771 Invalid, 0 Unknown, 198 Unchecked, 0.4s Time] [2022-03-01 18:38:26,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-03-01 18:38:26,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 213. [2022-03-01 18:38:26,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2216981132075473) internal successors, (471), 212 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:26,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 471 transitions. [2022-03-01 18:38:26,957 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 471 transitions. Word has length 23 [2022-03-01 18:38:26,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:26,957 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 471 transitions. [2022-03-01 18:38:26,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:26,958 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 471 transitions. [2022-03-01 18:38:26,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 18:38:26,958 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:26,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:26,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 18:38:27,171 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 [2022-03-01 18:38:27,172 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:38:27,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:27,172 INFO L85 PathProgramCache]: Analyzing trace with hash 7492009, now seen corresponding path program 7 times [2022-03-01 18:38:27,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:27,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673848443] [2022-03-01 18:38:27,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:27,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:27,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:27,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673848443] [2022-03-01 18:38:27,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673848443] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:38:27,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870737057] [2022-03-01 18:38:27,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:38:27,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:27,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:27,261 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) [2022-03-01 18:38:27,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 18:38:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:27,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 18:38:27,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:38:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:27,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:38:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:27,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870737057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:38:27,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:38:27,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-03-01 18:38:27,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067930273] [2022-03-01 18:38:27,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:38:27,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:38:27,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:27,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:38:27,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:38:27,781 INFO L87 Difference]: Start difference. First operand 213 states and 471 transitions. Second operand has 25 states, 25 states have (on average 2.28) 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) [2022-03-01 18:38:28,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:28,739 INFO L93 Difference]: Finished difference Result 713 states and 1422 transitions. [2022-03-01 18:38:28,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 18:38:28,739 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) 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 23 [2022-03-01 18:38:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:28,742 INFO L225 Difference]: With dead ends: 713 [2022-03-01 18:38:28,742 INFO L226 Difference]: Without dead ends: 686 [2022-03-01 18:38:28,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=979, Invalid=2561, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 18:38:28,743 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 431 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:28,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 142 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:38:28,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-03-01 18:38:28,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 301. [2022-03-01 18:38:28,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.3066666666666666) internal successors, (692), 300 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:28,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 692 transitions. [2022-03-01 18:38:28,756 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 692 transitions. Word has length 23 [2022-03-01 18:38:28,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:28,756 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 692 transitions. [2022-03-01 18:38:28,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) 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) [2022-03-01 18:38:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 692 transitions. [2022-03-01 18:38:28,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 18:38:28,761 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:28,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:28,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-01 18:38:28,962 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 [2022-03-01 18:38:28,962 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:38:28,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:28,963 INFO L85 PathProgramCache]: Analyzing trace with hash 256165081, now seen corresponding path program 8 times [2022-03-01 18:38:28,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:28,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546044757] [2022-03-01 18:38:28,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:28,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:29,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:29,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546044757] [2022-03-01 18:38:29,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546044757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:38:29,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762619181] [2022-03-01 18:38:29,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:38:29,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:29,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:29,036 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) [2022-03-01 18:38:29,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 18:38:29,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:38:29,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:38:29,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 18:38:29,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:38:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:29,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:38:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:29,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762619181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:38:29,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:38:29,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-01 18:38:29,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511604770] [2022-03-01 18:38:29,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:38:29,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:38:29,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:29,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:38:29,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:38:29,411 INFO L87 Difference]: Start difference. First operand 301 states and 692 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) [2022-03-01 18:38:29,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:29,753 INFO L93 Difference]: Finished difference Result 524 states and 1132 transitions. [2022-03-01 18:38:29,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:38:29,754 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 23 [2022-03-01 18:38:29,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:29,755 INFO L225 Difference]: With dead ends: 524 [2022-03-01 18:38:29,755 INFO L226 Difference]: Without dead ends: 520 [2022-03-01 18:38:29,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:38:29,756 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 160 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:29,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 86 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:38:29,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-01 18:38:29,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 343. [2022-03-01 18:38:29,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.324561403508772) internal successors, (795), 342 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:29,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 795 transitions. [2022-03-01 18:38:29,763 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 795 transitions. Word has length 23 [2022-03-01 18:38:29,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:29,764 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 795 transitions. [2022-03-01 18:38:29,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) [2022-03-01 18:38:29,764 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 795 transitions. [2022-03-01 18:38:29,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 18:38:29,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:29,764 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:29,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 18:38:29,980 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 [2022-03-01 18:38:29,981 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:38:29,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:29,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1482502569, now seen corresponding path program 9 times [2022-03-01 18:38:29,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:29,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133621880] [2022-03-01 18:38:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:29,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:30,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:30,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133621880] [2022-03-01 18:38:30,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133621880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:38:30,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792406851] [2022-03-01 18:38:30,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:38:30,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:30,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:30,103 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) [2022-03-01 18:38:30,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 18:38:30,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:38:30,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:38:30,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 18:38:30,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:38:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:30,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:38:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:30,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792406851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:38:30,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:38:30,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 23 [2022-03-01 18:38:30,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363260863] [2022-03-01 18:38:30,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:38:30,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:38:30,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:30,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:38:30,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:38:30,471 INFO L87 Difference]: Start difference. First operand 343 states and 795 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:31,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:31,148 INFO L93 Difference]: Finished difference Result 809 states and 1674 transitions. [2022-03-01 18:38:31,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 18:38:31,149 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-01 18:38:31,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:31,152 INFO L225 Difference]: With dead ends: 809 [2022-03-01 18:38:31,153 INFO L226 Difference]: Without dead ends: 809 [2022-03-01 18:38:31,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=782, Invalid=2298, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 18:38:31,154 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 252 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:31,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 139 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:38:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-03-01 18:38:31,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 335. [2022-03-01 18:38:31,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.338323353293413) internal successors, (781), 334 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:31,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 781 transitions. [2022-03-01 18:38:31,165 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 781 transitions. Word has length 25 [2022-03-01 18:38:31,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:31,166 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 781 transitions. [2022-03-01 18:38:31,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:31,166 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 781 transitions. [2022-03-01 18:38:31,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 18:38:31,168 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:31,168 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:31,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 18:38:31,379 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 [2022-03-01 18:38:31,379 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:38:31,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:31,380 INFO L85 PathProgramCache]: Analyzing trace with hash -781200115, now seen corresponding path program 10 times [2022-03-01 18:38:31,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:31,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985461346] [2022-03-01 18:38:31,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:31,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:31,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:31,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985461346] [2022-03-01 18:38:31,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985461346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:38:31,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672566366] [2022-03-01 18:38:31,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:38:31,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:31,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:31,443 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) [2022-03-01 18:38:31,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 18:38:31,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:38:31,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:38:31,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 18:38:31,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:38:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:31,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:38:31,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:31,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672566366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:38:31,820 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:38:31,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2022-03-01 18:38:31,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108927021] [2022-03-01 18:38:31,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:38:31,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 18:38:31,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:31,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 18:38:31,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2022-03-01 18:38:31,821 INFO L87 Difference]: Start difference. First operand 335 states and 781 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:32,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:32,421 INFO L93 Difference]: Finished difference Result 532 states and 1139 transitions. [2022-03-01 18:38:32,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 18:38:32,422 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-01 18:38:32,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:32,423 INFO L225 Difference]: With dead ends: 532 [2022-03-01 18:38:32,423 INFO L226 Difference]: Without dead ends: 528 [2022-03-01 18:38:32,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=847, Invalid=2015, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 18:38:32,424 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 189 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:32,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 67 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:38:32,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-03-01 18:38:32,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 330. [2022-03-01 18:38:32,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.3221884498480243) internal successors, (764), 329 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:32,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 764 transitions. [2022-03-01 18:38:32,432 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 764 transitions. Word has length 25 [2022-03-01 18:38:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:32,432 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 764 transitions. [2022-03-01 18:38:32,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:32,432 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 764 transitions. [2022-03-01 18:38:32,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:38:32,433 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:32,433 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:32,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 18:38:32,645 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 [2022-03-01 18:38:32,645 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:38:32,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:32,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1518663275, now seen corresponding path program 11 times [2022-03-01 18:38:32,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:32,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971133294] [2022-03-01 18:38:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:32,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:32,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:32,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971133294] [2022-03-01 18:38:32,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971133294] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:38:32,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702892476] [2022-03-01 18:38:32,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:38:32,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:32,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:32,841 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) [2022-03-01 18:38:32,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 18:38:32,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:38:32,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:38:32,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:38:32,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:38:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:33,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:38:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:33,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702892476] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:38:33,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:38:33,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-03-01 18:38:33,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873978497] [2022-03-01 18:38:33,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:38:33,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:38:33,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:33,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:38:33,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:38:33,616 INFO L87 Difference]: Start difference. First operand 330 states and 764 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) 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) [2022-03-01 18:38:35,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:35,388 INFO L93 Difference]: Finished difference Result 1062 states and 2277 transitions. [2022-03-01 18:38:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 18:38:35,389 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) 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 27 [2022-03-01 18:38:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:35,392 INFO L225 Difference]: With dead ends: 1062 [2022-03-01 18:38:35,392 INFO L226 Difference]: Without dead ends: 940 [2022-03-01 18:38:35,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=839, Invalid=3717, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 18:38:35,393 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 536 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:35,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 278 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:38:35,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-03-01 18:38:35,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 434. [2022-03-01 18:38:35,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.33256351039261) internal successors, (1010), 433 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:35,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1010 transitions. [2022-03-01 18:38:35,405 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1010 transitions. Word has length 27 [2022-03-01 18:38:35,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:35,405 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1010 transitions. [2022-03-01 18:38:35,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) 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) [2022-03-01 18:38:35,405 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1010 transitions. [2022-03-01 18:38:35,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:38:35,406 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:35,406 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:35,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 18:38:35,625 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 [2022-03-01 18:38:35,625 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:38:35,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:35,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2127718247, now seen corresponding path program 12 times [2022-03-01 18:38:35,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:35,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408525192] [2022-03-01 18:38:35,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:35,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:35,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:35,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408525192] [2022-03-01 18:38:35,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408525192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:38:35,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852905868] [2022-03-01 18:38:35,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:38:35,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:35,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:35,818 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) [2022-03-01 18:38:35,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 18:38:35,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:38:35,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:38:35,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:38:35,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:38:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:36,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:38:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:37,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852905868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:38:37,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:38:37,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 35 [2022-03-01 18:38:37,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93848779] [2022-03-01 18:38:37,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:38:37,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:38:37,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:37,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:38:37,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:38:37,094 INFO L87 Difference]: Start difference. First operand 434 states and 1010 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:53,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:53,172 INFO L93 Difference]: Finished difference Result 2209 states and 4746 transitions. [2022-03-01 18:38:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-03-01 18:38:53,172 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:38:53,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:53,178 INFO L225 Difference]: With dead ends: 2209 [2022-03-01 18:38:53,178 INFO L226 Difference]: Without dead ends: 2042 [2022-03-01 18:38:53,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 15488 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=6410, Invalid=29880, Unknown=0, NotChecked=0, Total=36290 [2022-03-01 18:38:53,184 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 668 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:53,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 450 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1404 Invalid, 0 Unknown, 528 Unchecked, 0.7s Time] [2022-03-01 18:38:53,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2022-03-01 18:38:53,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 613. [2022-03-01 18:38:53,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 2.3562091503267975) internal successors, (1442), 612 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1442 transitions. [2022-03-01 18:38:53,204 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1442 transitions. Word has length 27 [2022-03-01 18:38:53,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:53,204 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 1442 transitions. [2022-03-01 18:38:53,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:53,204 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1442 transitions. [2022-03-01 18:38:53,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:38:53,205 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:53,205 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:53,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 18:38:53,421 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 [2022-03-01 18:38:53,421 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:38:53,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:53,421 INFO L85 PathProgramCache]: Analyzing trace with hash 866515745, now seen corresponding path program 13 times [2022-03-01 18:38:53,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:53,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369435227] [2022-03-01 18:38:53,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:53,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:53,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:53,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369435227] [2022-03-01 18:38:53,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369435227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:38:53,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554207763] [2022-03-01 18:38:53,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:38:53,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:53,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:53,628 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) [2022-03-01 18:38:53,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 18:38:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:53,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:38:53,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:38:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:54,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:38:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:54,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554207763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:38:54,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:38:54,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 35 [2022-03-01 18:38:54,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323018814] [2022-03-01 18:38:54,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:38:54,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:38:54,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:54,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:38:54,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:38:54,754 INFO L87 Difference]: Start difference. First operand 613 states and 1442 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:05,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:05,321 INFO L93 Difference]: Finished difference Result 2366 states and 5234 transitions. [2022-03-01 18:39:05,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-03-01 18:39:05,321 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:39:05,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:05,348 INFO L225 Difference]: With dead ends: 2366 [2022-03-01 18:39:05,349 INFO L226 Difference]: Without dead ends: 2268 [2022-03-01 18:39:05,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 38 SyntacticMatches, 15 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 10932 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=4841, Invalid=19339, Unknown=0, NotChecked=0, Total=24180 [2022-03-01 18:39:05,353 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 648 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 600 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:05,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 252 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1014 Invalid, 0 Unknown, 600 Unchecked, 0.6s Time] [2022-03-01 18:39:05,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-03-01 18:39:05,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 748. [2022-03-01 18:39:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.3842034805890227) internal successors, (1781), 747 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:05,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1781 transitions. [2022-03-01 18:39:05,405 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1781 transitions. Word has length 27 [2022-03-01 18:39:05,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:05,405 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1781 transitions. [2022-03-01 18:39:05,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:05,405 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1781 transitions. [2022-03-01 18:39:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:39:05,406 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:05,406 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:05,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:05,622 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 [2022-03-01 18:39:05,622 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:39:05,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:05,623 INFO L85 PathProgramCache]: Analyzing trace with hash 597124453, now seen corresponding path program 14 times [2022-03-01 18:39:05,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:05,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268949863] [2022-03-01 18:39:05,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:05,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:05,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:05,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268949863] [2022-03-01 18:39:05,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268949863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:05,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422567787] [2022-03-01 18:39:05,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:39:05,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:05,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:05,751 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) [2022-03-01 18:39:05,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 18:39:05,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:39:05,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:05,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:39:05,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:06,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:06,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422567787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:06,459 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:06,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-03-01 18:39:06,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86491289] [2022-03-01 18:39:06,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:06,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:39:06,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:06,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:39:06,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:39:06,460 INFO L87 Difference]: Start difference. First operand 748 states and 1781 transitions. Second operand has 30 states, 30 states have (on average 2.3) 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) [2022-03-01 18:39:08,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:08,605 INFO L93 Difference]: Finished difference Result 2069 states and 4597 transitions. [2022-03-01 18:39:08,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-01 18:39:08,606 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) 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 27 [2022-03-01 18:39:08,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:08,611 INFO L225 Difference]: With dead ends: 2069 [2022-03-01 18:39:08,611 INFO L226 Difference]: Without dead ends: 2060 [2022-03-01 18:39:08,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2367, Invalid=7533, Unknown=0, NotChecked=0, Total=9900 [2022-03-01 18:39:08,613 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 538 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:08,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 235 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:39:08,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-03-01 18:39:08,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1128. [2022-03-01 18:39:08,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 2.3895297249334515) internal successors, (2693), 1127 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 2693 transitions. [2022-03-01 18:39:08,641 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 2693 transitions. Word has length 27 [2022-03-01 18:39:08,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:08,642 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 2693 transitions. [2022-03-01 18:39:08,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) 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) [2022-03-01 18:39:08,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 2693 transitions. [2022-03-01 18:39:08,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:39:08,643 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:08,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:08,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:08,859 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 [2022-03-01 18:39:08,860 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:39:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:08,860 INFO L85 PathProgramCache]: Analyzing trace with hash 2036570091, now seen corresponding path program 15 times [2022-03-01 18:39:08,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:08,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010187290] [2022-03-01 18:39:08,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:08,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:09,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:09,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010187290] [2022-03-01 18:39:09,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010187290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:09,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645884558] [2022-03-01 18:39:09,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:39:09,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:09,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:09,076 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) [2022-03-01 18:39:09,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 18:39:09,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:39:09,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:09,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:39:09,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:09,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:10,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:10,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645884558] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:10,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:10,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-03-01 18:39:10,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566205392] [2022-03-01 18:39:10,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:10,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:39:10,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:10,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:39:10,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:39:10,334 INFO L87 Difference]: Start difference. First operand 1128 states and 2693 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:15,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:15,199 INFO L93 Difference]: Finished difference Result 3134 states and 6922 transitions. [2022-03-01 18:39:15,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-01 18:39:15,199 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:39:15,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:15,207 INFO L225 Difference]: With dead ends: 3134 [2022-03-01 18:39:15,207 INFO L226 Difference]: Without dead ends: 2988 [2022-03-01 18:39:15,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10101 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3863, Invalid=21577, Unknown=0, NotChecked=0, Total=25440 [2022-03-01 18:39:15,211 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 896 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:15,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 481 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1740 Invalid, 0 Unknown, 352 Unchecked, 0.7s Time] [2022-03-01 18:39:15,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2022-03-01 18:39:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 1372. [2022-03-01 18:39:15,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 2.4033552151714077) internal successors, (3295), 1371 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:15,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 3295 transitions. [2022-03-01 18:39:15,243 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 3295 transitions. Word has length 27 [2022-03-01 18:39:15,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:15,243 INFO L470 AbstractCegarLoop]: Abstraction has 1372 states and 3295 transitions. [2022-03-01 18:39:15,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:15,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 3295 transitions. [2022-03-01 18:39:15,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:39:15,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:15,245 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:15,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:15,461 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 [2022-03-01 18:39:15,461 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:39:15,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:15,462 INFO L85 PathProgramCache]: Analyzing trace with hash 201920533, now seen corresponding path program 16 times [2022-03-01 18:39:15,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:15,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656428272] [2022-03-01 18:39:15,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:15,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:15,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:15,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656428272] [2022-03-01 18:39:15,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656428272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:15,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075293171] [2022-03-01 18:39:15,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:39:15,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:15,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:15,548 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) [2022-03-01 18:39:15,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 18:39:15,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:39:15,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:15,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:39:15,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:15,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:16,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075293171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:16,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:16,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 27 [2022-03-01 18:39:16,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504234993] [2022-03-01 18:39:16,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:16,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:39:16,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:16,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:39:16,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:39:16,404 INFO L87 Difference]: Start difference. First operand 1372 states and 3295 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) [2022-03-01 18:39:17,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:17,502 INFO L93 Difference]: Finished difference Result 2372 states and 5544 transitions. [2022-03-01 18:39:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 18:39:17,502 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 27 [2022-03-01 18:39:17,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:17,519 INFO L225 Difference]: With dead ends: 2372 [2022-03-01 18:39:17,519 INFO L226 Difference]: Without dead ends: 2358 [2022-03-01 18:39:17,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1404, Invalid=3852, Unknown=0, NotChecked=0, Total=5256 [2022-03-01 18:39:17,520 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 367 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:17,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 117 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:39:17,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2022-03-01 18:39:17,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1471. [2022-03-01 18:39:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.4224489795918367) internal successors, (3561), 1470 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3561 transitions. [2022-03-01 18:39:17,564 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3561 transitions. Word has length 27 [2022-03-01 18:39:17,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:17,564 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 3561 transitions. [2022-03-01 18:39:17,564 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) [2022-03-01 18:39:17,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3561 transitions. [2022-03-01 18:39:17,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:39:17,566 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:17,566 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:17,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:17,779 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 [2022-03-01 18:39:17,780 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:39:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:17,780 INFO L85 PathProgramCache]: Analyzing trace with hash 167708947, now seen corresponding path program 17 times [2022-03-01 18:39:17,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:17,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906133122] [2022-03-01 18:39:17,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:17,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:17,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:17,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906133122] [2022-03-01 18:39:17,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906133122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:17,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106876758] [2022-03-01 18:39:17,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:39:17,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:17,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:17,883 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) [2022-03-01 18:39:17,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 18:39:17,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:39:17,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:17,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:39:17,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:18,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:18,578 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:18,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106876758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:18,578 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:18,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 30 [2022-03-01 18:39:18,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279949900] [2022-03-01 18:39:18,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:18,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:39:18,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:18,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:39:18,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:39:18,579 INFO L87 Difference]: Start difference. First operand 1471 states and 3561 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 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) [2022-03-01 18:39:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:19,672 INFO L93 Difference]: Finished difference Result 2313 states and 5246 transitions. [2022-03-01 18:39:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:39:19,673 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 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 29 [2022-03-01 18:39:19,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:19,679 INFO L225 Difference]: With dead ends: 2313 [2022-03-01 18:39:19,679 INFO L226 Difference]: Without dead ends: 2265 [2022-03-01 18:39:19,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1458, Invalid=4704, Unknown=0, NotChecked=0, Total=6162 [2022-03-01 18:39:19,680 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 487 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:19,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 132 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:39:19,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2022-03-01 18:39:19,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1356. [2022-03-01 18:39:19,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 2.429520295202952) internal successors, (3292), 1355 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 3292 transitions. [2022-03-01 18:39:19,716 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 3292 transitions. Word has length 29 [2022-03-01 18:39:19,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:19,716 INFO L470 AbstractCegarLoop]: Abstraction has 1356 states and 3292 transitions. [2022-03-01 18:39:19,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 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) [2022-03-01 18:39:19,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 3292 transitions. [2022-03-01 18:39:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:39:19,718 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:19,718 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:19,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:19,934 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 [2022-03-01 18:39:19,934 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:39:19,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:19,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1561014771, now seen corresponding path program 18 times [2022-03-01 18:39:19,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:19,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875904353] [2022-03-01 18:39:19,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:19,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:20,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:20,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875904353] [2022-03-01 18:39:20,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875904353] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:20,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553207483] [2022-03-01 18:39:20,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:39:20,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:20,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:20,006 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) [2022-03-01 18:39:20,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 18:39:20,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-01 18:39:20,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:20,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:39:20,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:20,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:20,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553207483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:20,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:20,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 26 [2022-03-01 18:39:20,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100560907] [2022-03-01 18:39:20,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:20,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:39:20,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:39:20,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:39:20,548 INFO L87 Difference]: Start difference. First operand 1356 states and 3292 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:21,652 INFO L93 Difference]: Finished difference Result 1686 states and 3919 transitions. [2022-03-01 18:39:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 18:39:21,653 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:39:21,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:21,656 INFO L225 Difference]: With dead ends: 1686 [2022-03-01 18:39:21,656 INFO L226 Difference]: Without dead ends: 1682 [2022-03-01 18:39:21,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1559, Invalid=3991, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 18:39:21,657 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 229 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:21,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 100 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:39:21,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-03-01 18:39:21,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1318. [2022-03-01 18:39:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 2.4229309035687168) internal successors, (3191), 1317 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:21,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3191 transitions. [2022-03-01 18:39:21,676 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3191 transitions. Word has length 29 [2022-03-01 18:39:21,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:21,676 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 3191 transitions. [2022-03-01 18:39:21,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3191 transitions. [2022-03-01 18:39:21,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:39:21,678 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:21,678 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:21,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:21,891 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 [2022-03-01 18:39:21,891 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:39:21,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:21,892 INFO L85 PathProgramCache]: Analyzing trace with hash -634106839, now seen corresponding path program 19 times [2022-03-01 18:39:21,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:21,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685431061] [2022-03-01 18:39:21,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:21,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:39:21,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:21,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685431061] [2022-03-01 18:39:21,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685431061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:21,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330420875] [2022-03-01 18:39:21,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:39:21,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:21,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:21,981 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) [2022-03-01 18:39:21,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 18:39:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:22,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:39:22,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:39:22,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:23,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330420875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:23,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:23,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 28 [2022-03-01 18:39:23,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276571633] [2022-03-01 18:39:23,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:23,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:39:23,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:23,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:39:23,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:39:23,055 INFO L87 Difference]: Start difference. First operand 1318 states and 3191 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:25,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:25,880 INFO L93 Difference]: Finished difference Result 2767 states and 6117 transitions. [2022-03-01 18:39:25,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-01 18:39:25,880 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 18:39:25,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:25,885 INFO L225 Difference]: With dead ends: 2767 [2022-03-01 18:39:25,886 INFO L226 Difference]: Without dead ends: 2752 [2022-03-01 18:39:25,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4065 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2616, Invalid=8304, Unknown=0, NotChecked=0, Total=10920 [2022-03-01 18:39:25,887 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 440 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:25,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 244 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:39:25,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2022-03-01 18:39:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 1421. [2022-03-01 18:39:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 2.37887323943662) internal successors, (3378), 1420 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 3378 transitions. [2022-03-01 18:39:25,945 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 3378 transitions. Word has length 29 [2022-03-01 18:39:25,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:25,945 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 3378 transitions. [2022-03-01 18:39:25,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 3378 transitions. [2022-03-01 18:39:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:39:25,962 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:25,963 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:26,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:26,183 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 [2022-03-01 18:39:26,183 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:39:26,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:26,183 INFO L85 PathProgramCache]: Analyzing trace with hash -870593497, now seen corresponding path program 20 times [2022-03-01 18:39:26,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:26,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763659953] [2022-03-01 18:39:26,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:26,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:26,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:26,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763659953] [2022-03-01 18:39:26,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763659953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:26,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901318842] [2022-03-01 18:39:26,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:39:26,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:26,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:26,400 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) [2022-03-01 18:39:26,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 18:39:26,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:39:26,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:26,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:39:26,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:27,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:28,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901318842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:28,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:28,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 37 [2022-03-01 18:39:28,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402885247] [2022-03-01 18:39:28,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:28,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-01 18:39:28,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:28,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-01 18:39:28,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1067, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:39:28,097 INFO L87 Difference]: Start difference. First operand 1421 states and 3378 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:34,313 INFO L93 Difference]: Finished difference Result 2866 states and 6426 transitions. [2022-03-01 18:39:34,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-01 18:39:34,313 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 18:39:34,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:34,317 INFO L225 Difference]: With dead ends: 2866 [2022-03-01 18:39:34,317 INFO L226 Difference]: Without dead ends: 2794 [2022-03-01 18:39:34,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4993 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2991, Invalid=10349, Unknown=0, NotChecked=0, Total=13340 [2022-03-01 18:39:34,319 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 554 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:34,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 410 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1561 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:39:34,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2022-03-01 18:39:34,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 1543. [2022-03-01 18:39:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1542 states have (on average 2.3605706874189365) internal successors, (3640), 1542 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:34,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 3640 transitions. [2022-03-01 18:39:34,369 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 3640 transitions. Word has length 29 [2022-03-01 18:39:34,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:34,370 INFO L470 AbstractCegarLoop]: Abstraction has 1543 states and 3640 transitions. [2022-03-01 18:39:34,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:34,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 3640 transitions. [2022-03-01 18:39:34,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:39:34,372 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:34,372 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:34,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-01 18:39:34,587 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 [2022-03-01 18:39:34,588 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:39:34,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:34,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1331432529, now seen corresponding path program 21 times [2022-03-01 18:39:34,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:34,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723446018] [2022-03-01 18:39:34,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:34,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:34,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:34,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723446018] [2022-03-01 18:39:34,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723446018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:34,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448495810] [2022-03-01 18:39:34,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:39:34,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:34,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:34,801 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) [2022-03-01 18:39:34,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 18:39:34,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:39:34,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:34,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 18:39:34,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:35,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:35,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448495810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:35,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:35,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-01 18:39:36,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729028128] [2022-03-01 18:39:36,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:36,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:39:36,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:36,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:39:36,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1239, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:39:36,001 INFO L87 Difference]: Start difference. First operand 1543 states and 3640 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:41,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:41,674 INFO L93 Difference]: Finished difference Result 3195 states and 7142 transitions. [2022-03-01 18:39:41,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-01 18:39:41,674 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:39:41,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:41,679 INFO L225 Difference]: With dead ends: 3195 [2022-03-01 18:39:41,679 INFO L226 Difference]: Without dead ends: 3182 [2022-03-01 18:39:41,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8119 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3862, Invalid=17308, Unknown=0, NotChecked=0, Total=21170 [2022-03-01 18:39:41,680 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 588 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 541 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:41,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 307 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1322 Invalid, 0 Unknown, 541 Unchecked, 0.7s Time] [2022-03-01 18:39:41,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2022-03-01 18:39:41,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 1828. [2022-03-01 18:39:41,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 2.3787629994526545) internal successors, (4346), 1827 states have internal predecessors, (4346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:41,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 4346 transitions. [2022-03-01 18:39:41,710 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 4346 transitions. Word has length 31 [2022-03-01 18:39:41,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:41,710 INFO L470 AbstractCegarLoop]: Abstraction has 1828 states and 4346 transitions. [2022-03-01 18:39:41,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:41,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 4346 transitions. [2022-03-01 18:39:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:39:41,713 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:41,713 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:41,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:41,943 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 [2022-03-01 18:39:41,944 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:39:41,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:41,944 INFO L85 PathProgramCache]: Analyzing trace with hash -87583581, now seen corresponding path program 22 times [2022-03-01 18:39:41,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:41,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652790939] [2022-03-01 18:39:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:41,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:42,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:42,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652790939] [2022-03-01 18:39:42,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652790939] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:42,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690661452] [2022-03-01 18:39:42,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:39:42,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:42,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:42,164 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) [2022-03-01 18:39:42,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 18:39:42,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:39:42,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:42,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 18:39:42,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:42,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:43,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690661452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:43,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:43,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 41 [2022-03-01 18:39:43,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750329725] [2022-03-01 18:39:43,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:43,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:39:43,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:43,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:39:43,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:39:43,592 INFO L87 Difference]: Start difference. First operand 1828 states and 4346 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:00,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:00,646 INFO L93 Difference]: Finished difference Result 4237 states and 9400 transitions. [2022-03-01 18:40:00,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-03-01 18:40:00,646 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:40:00,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:00,653 INFO L225 Difference]: With dead ends: 4237 [2022-03-01 18:40:00,653 INFO L226 Difference]: Without dead ends: 4083 [2022-03-01 18:40:00,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 42 SyntacticMatches, 23 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 18335 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=5852, Invalid=33154, Unknown=0, NotChecked=0, Total=39006 [2022-03-01 18:40:00,655 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 874 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 2366 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 2366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:00,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 693 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 2366 Invalid, 0 Unknown, 208 Unchecked, 1.2s Time] [2022-03-01 18:40:00,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4083 states. [2022-03-01 18:40:00,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4083 to 2081. [2022-03-01 18:40:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 2.3653846153846154) internal successors, (4920), 2080 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 4920 transitions. [2022-03-01 18:40:00,692 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 4920 transitions. Word has length 31 [2022-03-01 18:40:00,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:00,692 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 4920 transitions. [2022-03-01 18:40:00,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:00,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 4920 transitions. [2022-03-01 18:40:00,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:40:00,695 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:00,696 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:00,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:00,912 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 [2022-03-01 18:40:00,912 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:40:00,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:00,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1093246803, now seen corresponding path program 23 times [2022-03-01 18:40:00,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:00,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922184472] [2022-03-01 18:40:00,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:00,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:01,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:01,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922184472] [2022-03-01 18:40:01,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922184472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:01,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175682460] [2022-03-01 18:40:01,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:40:01,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:01,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:01,134 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) [2022-03-01 18:40:01,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 18:40:01,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:40:01,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:40:01,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 18:40:01,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:01,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:03,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175682460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:03,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:03,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 41 [2022-03-01 18:40:03,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898710405] [2022-03-01 18:40:03,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:03,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:40:03,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:03,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:40:03,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1344, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:40:03,353 INFO L87 Difference]: Start difference. First operand 2081 states and 4920 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:19,090 INFO L93 Difference]: Finished difference Result 4464 states and 9835 transitions. [2022-03-01 18:40:19,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-03-01 18:40:19,095 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:40:19,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:19,124 INFO L225 Difference]: With dead ends: 4464 [2022-03-01 18:40:19,124 INFO L226 Difference]: Without dead ends: 4313 [2022-03-01 18:40:19,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 47 SyntacticMatches, 24 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 15729 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=5838, Invalid=28944, Unknown=0, NotChecked=0, Total=34782 [2022-03-01 18:40:19,126 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 885 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 2205 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:19,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 406 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2205 Invalid, 0 Unknown, 124 Unchecked, 1.1s Time] [2022-03-01 18:40:19,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2022-03-01 18:40:19,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 2299. [2022-03-01 18:40:19,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 2.365100087032202) internal successors, (5435), 2298 states have internal predecessors, (5435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 5435 transitions. [2022-03-01 18:40:19,177 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 5435 transitions. Word has length 31 [2022-03-01 18:40:19,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:19,177 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 5435 transitions. [2022-03-01 18:40:19,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:19,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 5435 transitions. [2022-03-01 18:40:19,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:40:19,180 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:19,180 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:19,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:19,396 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 [2022-03-01 18:40:19,397 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:40:19,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:19,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1903086369, now seen corresponding path program 24 times [2022-03-01 18:40:19,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:19,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164248497] [2022-03-01 18:40:19,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:19,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:19,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:19,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164248497] [2022-03-01 18:40:19,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164248497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:19,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483243466] [2022-03-01 18:40:19,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:40:19,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:19,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:19,599 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) [2022-03-01 18:40:19,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 18:40:19,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:40:19,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:40:19,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:40:19,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:20,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:20,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483243466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:20,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:20,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2022-03-01 18:40:20,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941043826] [2022-03-01 18:40:20,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:20,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 18:40:20,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:20,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 18:40:20,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:40:20,461 INFO L87 Difference]: Start difference. First operand 2299 states and 5435 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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) [2022-03-01 18:40:26,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:26,955 INFO L93 Difference]: Finished difference Result 6164 states and 13824 transitions. [2022-03-01 18:40:26,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-03-01 18:40:26,956 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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 31 [2022-03-01 18:40:26,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:26,964 INFO L225 Difference]: With dead ends: 6164 [2022-03-01 18:40:26,964 INFO L226 Difference]: Without dead ends: 6119 [2022-03-01 18:40:26,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12231 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=6371, Invalid=23041, Unknown=0, NotChecked=0, Total=29412 [2022-03-01 18:40:26,966 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 720 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:26,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 280 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:40:26,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6119 states. [2022-03-01 18:40:27,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6119 to 3767. [2022-03-01 18:40:27,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3766 states have (on average 2.374137015400956) internal successors, (8941), 3766 states have internal predecessors, (8941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 8941 transitions. [2022-03-01 18:40:27,067 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 8941 transitions. Word has length 31 [2022-03-01 18:40:27,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:27,067 INFO L470 AbstractCegarLoop]: Abstraction has 3767 states and 8941 transitions. [2022-03-01 18:40:27,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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) [2022-03-01 18:40:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 8941 transitions. [2022-03-01 18:40:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:40:27,073 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:27,073 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:27,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:27,287 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 [2022-03-01 18:40:27,287 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:40:27,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:27,288 INFO L85 PathProgramCache]: Analyzing trace with hash -904596441, now seen corresponding path program 25 times [2022-03-01 18:40:27,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:27,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16984866] [2022-03-01 18:40:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:27,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:27,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:27,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16984866] [2022-03-01 18:40:27,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16984866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:27,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263761349] [2022-03-01 18:40:27,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:40:27,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:27,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:27,551 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) [2022-03-01 18:40:27,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 18:40:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:27,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 18:40:27,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:28,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:28,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263761349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:28,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:28,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-01 18:40:28,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114995252] [2022-03-01 18:40:28,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:28,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:40:28,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:28,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:40:28,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:40:28,865 INFO L87 Difference]: Start difference. First operand 3767 states and 8941 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:35,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:35,068 INFO L93 Difference]: Finished difference Result 6121 states and 14073 transitions. [2022-03-01 18:40:35,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-01 18:40:35,068 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:40:35,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:35,076 INFO L225 Difference]: With dead ends: 6121 [2022-03-01 18:40:35,076 INFO L226 Difference]: Without dead ends: 6005 [2022-03-01 18:40:35,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 42 SyntacticMatches, 10 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8029 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=3648, Invalid=16374, Unknown=0, NotChecked=0, Total=20022 [2022-03-01 18:40:35,078 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 530 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:35,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 225 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1325 Invalid, 0 Unknown, 658 Unchecked, 0.7s Time] [2022-03-01 18:40:35,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2022-03-01 18:40:35,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 3993. [2022-03-01 18:40:35,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3993 states, 3992 states have (on average 2.3599699398797593) internal successors, (9421), 3992 states have internal predecessors, (9421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:35,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3993 states to 3993 states and 9421 transitions. [2022-03-01 18:40:35,169 INFO L78 Accepts]: Start accepts. Automaton has 3993 states and 9421 transitions. Word has length 31 [2022-03-01 18:40:35,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:35,169 INFO L470 AbstractCegarLoop]: Abstraction has 3993 states and 9421 transitions. [2022-03-01 18:40:35,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:35,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3993 states and 9421 transitions. [2022-03-01 18:40:35,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:40:35,174 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:35,174 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:35,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:35,387 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 [2022-03-01 18:40:35,387 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:40:35,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:35,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1973777929, now seen corresponding path program 26 times [2022-03-01 18:40:35,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:35,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542902094] [2022-03-01 18:40:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:35,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:35,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:35,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542902094] [2022-03-01 18:40:35,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542902094] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:35,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077925330] [2022-03-01 18:40:35,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:40:35,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:35,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:35,590 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) [2022-03-01 18:40:35,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 18:40:35,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:40:35,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:40:35,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 18:40:35,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:36,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:37,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077925330] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:37,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:37,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 41 [2022-03-01 18:40:37,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561051935] [2022-03-01 18:40:37,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:37,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:40:37,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:37,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:40:37,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:40:37,115 INFO L87 Difference]: Start difference. First operand 3993 states and 9421 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:59,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:59,079 INFO L93 Difference]: Finished difference Result 9171 states and 20860 transitions. [2022-03-01 18:40:59,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2022-03-01 18:40:59,079 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:40:59,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:59,089 INFO L225 Difference]: With dead ends: 9171 [2022-03-01 18:40:59,090 INFO L226 Difference]: Without dead ends: 9012 [2022-03-01 18:40:59,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 45 SyntacticMatches, 20 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 30286 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=10481, Invalid=54799, Unknown=0, NotChecked=0, Total=65280 [2022-03-01 18:40:59,093 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1050 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:59,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 500 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 2037 Invalid, 0 Unknown, 660 Unchecked, 1.1s Time] [2022-03-01 18:40:59,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9012 states. [2022-03-01 18:40:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9012 to 4514. [2022-03-01 18:40:59,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4514 states, 4513 states have (on average 2.348991801462442) internal successors, (10601), 4513 states have internal predecessors, (10601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4514 states to 4514 states and 10601 transitions. [2022-03-01 18:40:59,178 INFO L78 Accepts]: Start accepts. Automaton has 4514 states and 10601 transitions. Word has length 31 [2022-03-01 18:40:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:59,178 INFO L470 AbstractCegarLoop]: Abstraction has 4514 states and 10601 transitions. [2022-03-01 18:40:59,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:59,178 INFO L276 IsEmpty]: Start isEmpty. Operand 4514 states and 10601 transitions. [2022-03-01 18:40:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:40:59,183 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:59,183 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:59,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:59,399 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 [2022-03-01 18:40:59,399 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:40:59,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:59,400 INFO L85 PathProgramCache]: Analyzing trace with hash 35494899, now seen corresponding path program 27 times [2022-03-01 18:40:59,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:59,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026294162] [2022-03-01 18:40:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:59,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:59,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:59,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026294162] [2022-03-01 18:40:59,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026294162] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:59,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565464114] [2022-03-01 18:40:59,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:40:59,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:59,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:59,600 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) [2022-03-01 18:40:59,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 18:40:59,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 18:40:59,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:40:59,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:40:59,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:00,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:00,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565464114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:00,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:00,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 36 [2022-03-01 18:41:00,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890794057] [2022-03-01 18:41:00,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:00,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 18:41:00,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:00,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 18:41:00,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:41:00,578 INFO L87 Difference]: Start difference. First operand 4514 states and 10601 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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) [2022-03-01 18:41:03,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:03,441 INFO L93 Difference]: Finished difference Result 7799 states and 18028 transitions. [2022-03-01 18:41:03,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 18:41:03,441 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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 31 [2022-03-01 18:41:03,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:03,453 INFO L225 Difference]: With dead ends: 7799 [2022-03-01 18:41:03,454 INFO L226 Difference]: Without dead ends: 7793 [2022-03-01 18:41:03,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3365 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2444, Invalid=7258, Unknown=0, NotChecked=0, Total=9702 [2022-03-01 18:41:03,455 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 648 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:03,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 210 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:41:03,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2022-03-01 18:41:03,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 5845. [2022-03-01 18:41:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5845 states, 5844 states have (on average 2.384154688569473) internal successors, (13933), 5844 states have internal predecessors, (13933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:03,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5845 states to 5845 states and 13933 transitions. [2022-03-01 18:41:03,612 INFO L78 Accepts]: Start accepts. Automaton has 5845 states and 13933 transitions. Word has length 31 [2022-03-01 18:41:03,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:03,612 INFO L470 AbstractCegarLoop]: Abstraction has 5845 states and 13933 transitions. [2022-03-01 18:41:03,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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) [2022-03-01 18:41:03,612 INFO L276 IsEmpty]: Start isEmpty. Operand 5845 states and 13933 transitions. [2022-03-01 18:41:03,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:41:03,618 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:03,618 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:03,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-01 18:41:03,863 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 [2022-03-01 18:41:03,863 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:41:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:03,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1960214635, now seen corresponding path program 28 times [2022-03-01 18:41:03,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:03,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947556645] [2022-03-01 18:41:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:03,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:41:04,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:04,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947556645] [2022-03-01 18:41:04,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947556645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:04,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445860380] [2022-03-01 18:41:04,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:41:04,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:04,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:04,024 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) [2022-03-01 18:41:04,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 18:41:04,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:41:04,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:04,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:41:04,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:41:04,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:04,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445860380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:04,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:04,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2022-03-01 18:41:04,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937867745] [2022-03-01 18:41:04,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:04,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:41:04,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:04,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:41:04,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:41:04,801 INFO L87 Difference]: Start difference. First operand 5845 states and 13933 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:06,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:06,084 INFO L93 Difference]: Finished difference Result 7411 states and 17541 transitions. [2022-03-01 18:41:06,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:41:06,084 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 18:41:06,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:06,096 INFO L225 Difference]: With dead ends: 7411 [2022-03-01 18:41:06,096 INFO L226 Difference]: Without dead ends: 7388 [2022-03-01 18:41:06,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1290, Invalid=3680, Unknown=0, NotChecked=0, Total=4970 [2022-03-01 18:41:06,097 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 362 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:06,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 181 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:41:06,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2022-03-01 18:41:06,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 6246. [2022-03-01 18:41:06,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6246 states, 6245 states have (on average 2.387990392313851) internal successors, (14913), 6245 states have internal predecessors, (14913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:06,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6246 states to 6246 states and 14913 transitions. [2022-03-01 18:41:06,216 INFO L78 Accepts]: Start accepts. Automaton has 6246 states and 14913 transitions. Word has length 31 [2022-03-01 18:41:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:06,216 INFO L470 AbstractCegarLoop]: Abstraction has 6246 states and 14913 transitions. [2022-03-01 18:41:06,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 6246 states and 14913 transitions. [2022-03-01 18:41:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:41:06,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:06,224 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:06,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:06,442 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 [2022-03-01 18:41:06,442 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:41:06,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:06,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1947749671, now seen corresponding path program 29 times [2022-03-01 18:41:06,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:06,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669445061] [2022-03-01 18:41:06,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:06,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:06,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:06,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669445061] [2022-03-01 18:41:06,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669445061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:06,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33149579] [2022-03-01 18:41:06,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:41:06,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:06,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:06,588 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) [2022-03-01 18:41:06,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 18:41:06,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 18:41:06,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:06,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:41:06,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:07,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:07,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33149579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:07,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:07,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 34 [2022-03-01 18:41:07,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687208761] [2022-03-01 18:41:07,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:07,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:41:07,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:07,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:41:07,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:41:07,642 INFO L87 Difference]: Start difference. First operand 6246 states and 14913 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:10,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:10,640 INFO L93 Difference]: Finished difference Result 9896 states and 23200 transitions. [2022-03-01 18:41:10,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-01 18:41:10,642 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:41:10,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:10,655 INFO L225 Difference]: With dead ends: 9896 [2022-03-01 18:41:10,656 INFO L226 Difference]: Without dead ends: 9869 [2022-03-01 18:41:10,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3944 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2625, Invalid=8505, Unknown=0, NotChecked=0, Total=11130 [2022-03-01 18:41:10,657 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 442 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:10,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 262 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:41:10,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9869 states. [2022-03-01 18:41:10,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9869 to 7467. [2022-03-01 18:41:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7467 states, 7466 states have (on average 2.40208947227431) internal successors, (17934), 7466 states have internal predecessors, (17934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7467 states to 7467 states and 17934 transitions. [2022-03-01 18:41:10,786 INFO L78 Accepts]: Start accepts. Automaton has 7467 states and 17934 transitions. Word has length 31 [2022-03-01 18:41:10,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:10,787 INFO L470 AbstractCegarLoop]: Abstraction has 7467 states and 17934 transitions. [2022-03-01 18:41:10,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:10,787 INFO L276 IsEmpty]: Start isEmpty. Operand 7467 states and 17934 transitions. [2022-03-01 18:41:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:41:10,796 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:10,796 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:10,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:11,013 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 [2022-03-01 18:41:11,013 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:41:11,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:11,013 INFO L85 PathProgramCache]: Analyzing trace with hash -352748575, now seen corresponding path program 30 times [2022-03-01 18:41:11,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:11,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117606242] [2022-03-01 18:41:11,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:11,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:41:11,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:11,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117606242] [2022-03-01 18:41:11,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117606242] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:11,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877578846] [2022-03-01 18:41:11,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:41:11,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:11,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:11,264 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) [2022-03-01 18:41:11,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 18:41:11,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 18:41:11,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:11,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 18:41:11,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:12,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:12,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877578846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:12,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:12,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 40 [2022-03-01 18:41:12,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382097731] [2022-03-01 18:41:12,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:12,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:41:12,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:12,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:41:12,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1287, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:41:12,727 INFO L87 Difference]: Start difference. First operand 7467 states and 17934 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:26,643 INFO L93 Difference]: Finished difference Result 12255 states and 28618 transitions. [2022-03-01 18:41:26,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-03-01 18:41:26,643 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:41:26,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:26,659 INFO L225 Difference]: With dead ends: 12255 [2022-03-01 18:41:26,659 INFO L226 Difference]: Without dead ends: 12086 [2022-03-01 18:41:26,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22716 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=6944, Invalid=47112, Unknown=0, NotChecked=0, Total=54056 [2022-03-01 18:41:26,663 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 840 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 2717 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 3045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 2717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:26,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 600 Invalid, 3045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 2717 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 18:41:26,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12086 states. [2022-03-01 18:41:26,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12086 to 7931. [2022-03-01 18:41:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 2.4058007566204287) internal successors, (19078), 7930 states have internal predecessors, (19078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 19078 transitions. [2022-03-01 18:41:26,836 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 19078 transitions. Word has length 31 [2022-03-01 18:41:26,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:26,836 INFO L470 AbstractCegarLoop]: Abstraction has 7931 states and 19078 transitions. [2022-03-01 18:41:26,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:26,836 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 19078 transitions. [2022-03-01 18:41:26,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:41:26,845 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:26,846 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:26,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-01 18:41:27,059 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 [2022-03-01 18:41:27,059 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:41:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:27,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1441871721, now seen corresponding path program 31 times [2022-03-01 18:41:27,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:27,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429616627] [2022-03-01 18:41:27,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:27,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 18:41:27,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:27,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429616627] [2022-03-01 18:41:27,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429616627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:27,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054609956] [2022-03-01 18:41:27,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:41:27,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:27,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:27,246 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) [2022-03-01 18:41:27,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 18:41:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:27,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 18:41:27,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:27,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:28,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054609956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:28,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:28,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 39 [2022-03-01 18:41:28,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731566026] [2022-03-01 18:41:28,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:28,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-01 18:41:28,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:28,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-01 18:41:28,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1175, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:41:28,743 INFO L87 Difference]: Start difference. First operand 7931 states and 19078 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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) [2022-03-01 18:41:42,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:42,714 INFO L93 Difference]: Finished difference Result 14065 states and 33184 transitions. [2022-03-01 18:41:42,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-01 18:41:42,714 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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 31 [2022-03-01 18:41:42,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:42,732 INFO L225 Difference]: With dead ends: 14065 [2022-03-01 18:41:42,733 INFO L226 Difference]: Without dead ends: 13939 [2022-03-01 18:41:42,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11148 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=6150, Invalid=22920, Unknown=0, NotChecked=0, Total=29070 [2022-03-01 18:41:42,735 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 809 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:42,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 529 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 2007 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 18:41:42,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13939 states. [2022-03-01 18:41:42,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13939 to 8747. [2022-03-01 18:41:42,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8747 states, 8746 states have (on average 2.4141321747084383) internal successors, (21114), 8746 states have internal predecessors, (21114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:42,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8747 states to 8747 states and 21114 transitions. [2022-03-01 18:41:42,918 INFO L78 Accepts]: Start accepts. Automaton has 8747 states and 21114 transitions. Word has length 31 [2022-03-01 18:41:42,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:42,918 INFO L470 AbstractCegarLoop]: Abstraction has 8747 states and 21114 transitions. [2022-03-01 18:41:42,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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) [2022-03-01 18:41:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand 8747 states and 21114 transitions. [2022-03-01 18:41:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:41:42,929 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:42,929 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:42,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-01 18:41:43,143 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 [2022-03-01 18:41:43,143 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:41:43,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:43,144 INFO L85 PathProgramCache]: Analyzing trace with hash -74939733, now seen corresponding path program 32 times [2022-03-01 18:41:43,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:43,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888893705] [2022-03-01 18:41:43,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:43,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:43,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:43,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888893705] [2022-03-01 18:41:43,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888893705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:43,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725802548] [2022-03-01 18:41:43,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:41:43,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:43,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:43,405 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) [2022-03-01 18:41:43,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 18:41:43,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:41:43,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:43,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 18:41:43,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:44,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:45,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725802548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:45,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:45,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-01 18:41:45,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53183780] [2022-03-01 18:41:45,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:45,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:41:45,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:45,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:41:45,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:41:45,227 INFO L87 Difference]: Start difference. First operand 8747 states and 21114 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:58,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:58,615 INFO L93 Difference]: Finished difference Result 18782 states and 44443 transitions. [2022-03-01 18:41:58,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2022-03-01 18:41:58,615 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:41:58,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:58,646 INFO L225 Difference]: With dead ends: 18782 [2022-03-01 18:41:58,646 INFO L226 Difference]: Without dead ends: 18757 [2022-03-01 18:41:58,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28310 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=8746, Invalid=56534, Unknown=0, NotChecked=0, Total=65280 [2022-03-01 18:41:58,650 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 705 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 692 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:58,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 478 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 2092 Invalid, 0 Unknown, 692 Unchecked, 1.0s Time] [2022-03-01 18:41:58,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18757 states. [2022-03-01 18:41:58,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18757 to 9498. [2022-03-01 18:41:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9498 states, 9497 states have (on average 2.419816784247657) internal successors, (22981), 9497 states have internal predecessors, (22981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9498 states to 9498 states and 22981 transitions. [2022-03-01 18:41:58,907 INFO L78 Accepts]: Start accepts. Automaton has 9498 states and 22981 transitions. Word has length 31 [2022-03-01 18:41:58,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:58,907 INFO L470 AbstractCegarLoop]: Abstraction has 9498 states and 22981 transitions. [2022-03-01 18:41:58,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:58,908 INFO L276 IsEmpty]: Start isEmpty. Operand 9498 states and 22981 transitions. [2022-03-01 18:41:58,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:41:58,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:58,918 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:58,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:59,131 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 [2022-03-01 18:41:59,131 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:41:59,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:59,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2119534507, now seen corresponding path program 33 times [2022-03-01 18:41:59,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:59,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887847446] [2022-03-01 18:41:59,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:59,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:59,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:59,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887847446] [2022-03-01 18:41:59,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887847446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:59,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415535331] [2022-03-01 18:41:59,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:41:59,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:59,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:59,317 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) [2022-03-01 18:41:59,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 18:41:59,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:41:59,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:59,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:41:59,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:59,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:00,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415535331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:00,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:00,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2022-03-01 18:42:00,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441978252] [2022-03-01 18:42:00,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:00,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 18:42:00,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:00,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 18:42:00,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:42:00,314 INFO L87 Difference]: Start difference. First operand 9498 states and 22981 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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) [2022-03-01 18:42:03,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:03,908 INFO L93 Difference]: Finished difference Result 13376 states and 31636 transitions. [2022-03-01 18:42:03,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-01 18:42:03,909 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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 31 [2022-03-01 18:42:03,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:03,985 INFO L225 Difference]: With dead ends: 13376 [2022-03-01 18:42:03,985 INFO L226 Difference]: Without dead ends: 13355 [2022-03-01 18:42:03,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4718 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3140, Invalid=9742, Unknown=0, NotChecked=0, Total=12882 [2022-03-01 18:42:03,986 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 671 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:03,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 377 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:42:03,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13355 states. [2022-03-01 18:42:04,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13355 to 9888. [2022-03-01 18:42:04,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9888 states, 9887 states have (on average 2.43633053504602) internal successors, (24088), 9887 states have internal predecessors, (24088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:04,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9888 states to 9888 states and 24088 transitions. [2022-03-01 18:42:04,133 INFO L78 Accepts]: Start accepts. Automaton has 9888 states and 24088 transitions. Word has length 31 [2022-03-01 18:42:04,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:04,133 INFO L470 AbstractCegarLoop]: Abstraction has 9888 states and 24088 transitions. [2022-03-01 18:42:04,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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) [2022-03-01 18:42:04,133 INFO L276 IsEmpty]: Start isEmpty. Operand 9888 states and 24088 transitions. [2022-03-01 18:42:04,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:42:04,143 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:04,143 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:04,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:04,359 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 [2022-03-01 18:42:04,359 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:42:04,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:04,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1454095937, now seen corresponding path program 34 times [2022-03-01 18:42:04,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:04,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229372824] [2022-03-01 18:42:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:04,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:04,564 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:42:04,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:04,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229372824] [2022-03-01 18:42:04,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229372824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:04,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671270598] [2022-03-01 18:42:04,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:42:04,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:04,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:04,566 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) [2022-03-01 18:42:04,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 18:42:04,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:42:04,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:04,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 18:42:04,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:05,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:06,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671270598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:06,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:06,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 40 [2022-03-01 18:42:06,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034009032] [2022-03-01 18:42:06,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:06,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:42:06,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:06,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:42:06,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:42:06,646 INFO L87 Difference]: Start difference. First operand 9888 states and 24088 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:27,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:27,813 INFO L93 Difference]: Finished difference Result 17705 states and 41885 transitions. [2022-03-01 18:42:27,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2022-03-01 18:42:27,814 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:42:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:27,855 INFO L225 Difference]: With dead ends: 17705 [2022-03-01 18:42:27,855 INFO L226 Difference]: Without dead ends: 17594 [2022-03-01 18:42:27,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 45 SyntacticMatches, 17 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 30848 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=10018, Invalid=56288, Unknown=0, NotChecked=0, Total=66306 [2022-03-01 18:42:27,858 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 949 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:27,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 639 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 2540 Invalid, 0 Unknown, 155 Unchecked, 1.3s Time] [2022-03-01 18:42:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17594 states. [2022-03-01 18:42:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17594 to 10848. [2022-03-01 18:42:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10848 states, 10847 states have (on average 2.433576103991887) internal successors, (26397), 10847 states have internal predecessors, (26397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:28,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10848 states to 10848 states and 26397 transitions. [2022-03-01 18:42:28,058 INFO L78 Accepts]: Start accepts. Automaton has 10848 states and 26397 transitions. Word has length 31 [2022-03-01 18:42:28,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:28,058 INFO L470 AbstractCegarLoop]: Abstraction has 10848 states and 26397 transitions. [2022-03-01 18:42:28,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:28,059 INFO L276 IsEmpty]: Start isEmpty. Operand 10848 states and 26397 transitions. [2022-03-01 18:42:28,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:42:28,069 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:28,069 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:28,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-01 18:42:28,283 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 [2022-03-01 18:42:28,283 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:42:28,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:28,284 INFO L85 PathProgramCache]: Analyzing trace with hash -492324689, now seen corresponding path program 35 times [2022-03-01 18:42:28,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:28,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598233006] [2022-03-01 18:42:28,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:28,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:28,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:28,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598233006] [2022-03-01 18:42:28,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598233006] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:28,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89448715] [2022-03-01 18:42:28,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:42:28,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:28,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:28,510 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) [2022-03-01 18:42:28,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 18:42:28,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:42:28,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:28,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 18:42:28,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:29,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:29,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89448715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:29,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:29,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-01 18:42:29,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282239702] [2022-03-01 18:42:29,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:29,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:42:29,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:29,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:42:29,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:42:29,809 INFO L87 Difference]: Start difference. First operand 10848 states and 26397 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:41,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:41,049 INFO L93 Difference]: Finished difference Result 17432 states and 41445 transitions. [2022-03-01 18:42:41,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2022-03-01 18:42:41,050 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:42:41,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:41,080 INFO L225 Difference]: With dead ends: 17432 [2022-03-01 18:42:41,080 INFO L226 Difference]: Without dead ends: 17272 [2022-03-01 18:42:41,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25305 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=8414, Invalid=50878, Unknown=0, NotChecked=0, Total=59292 [2022-03-01 18:42:41,087 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 909 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 3132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 540 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:41,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 432 Invalid, 3132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 2293 Invalid, 0 Unknown, 540 Unchecked, 1.0s Time] [2022-03-01 18:42:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17272 states. [2022-03-01 18:42:41,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17272 to 10560. [2022-03-01 18:42:41,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10560 states, 10559 states have (on average 2.4364049625911544) internal successors, (25726), 10559 states have internal predecessors, (25726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10560 states to 10560 states and 25726 transitions. [2022-03-01 18:42:41,347 INFO L78 Accepts]: Start accepts. Automaton has 10560 states and 25726 transitions. Word has length 31 [2022-03-01 18:42:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:41,347 INFO L470 AbstractCegarLoop]: Abstraction has 10560 states and 25726 transitions. [2022-03-01 18:42:41,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:41,347 INFO L276 IsEmpty]: Start isEmpty. Operand 10560 states and 25726 transitions. [2022-03-01 18:42:41,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 18:42:41,357 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:41,357 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:41,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:41,572 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 [2022-03-01 18:42:41,572 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:42:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:41,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1685542175, now seen corresponding path program 36 times [2022-03-01 18:42:41,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:41,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388298852] [2022-03-01 18:42:41,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:41,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:41,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:41,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388298852] [2022-03-01 18:42:41,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388298852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:41,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688769157] [2022-03-01 18:42:41,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:42:41,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:41,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:41,716 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) [2022-03-01 18:42:41,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 18:42:41,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 18:42:41,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:41,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:42:41,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:42,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:42,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688769157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:42,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:42,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-03-01 18:42:42,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283200878] [2022-03-01 18:42:42,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:42,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:42:42,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:42,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:42:42,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=903, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:42:42,423 INFO L87 Difference]: Start difference. First operand 10560 states and 25726 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) [2022-03-01 18:42:43,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:43,436 INFO L93 Difference]: Finished difference Result 12545 states and 30331 transitions. [2022-03-01 18:42:43,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:42:43,436 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 31 [2022-03-01 18:42:43,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:43,455 INFO L225 Difference]: With dead ends: 12545 [2022-03-01 18:42:43,455 INFO L226 Difference]: Without dead ends: 12541 [2022-03-01 18:42:43,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1818, Invalid=4988, Unknown=0, NotChecked=0, Total=6806 [2022-03-01 18:42:43,457 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 291 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:43,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 186 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:42:43,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12541 states. [2022-03-01 18:42:43,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12541 to 11369. [2022-03-01 18:42:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11369 states, 11368 states have (on average 2.4481878958479943) internal successors, (27831), 11368 states have internal predecessors, (27831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:43,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11369 states to 11369 states and 27831 transitions. [2022-03-01 18:42:43,658 INFO L78 Accepts]: Start accepts. Automaton has 11369 states and 27831 transitions. Word has length 31 [2022-03-01 18:42:43,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:43,658 INFO L470 AbstractCegarLoop]: Abstraction has 11369 states and 27831 transitions. [2022-03-01 18:42:43,658 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) [2022-03-01 18:42:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand 11369 states and 27831 transitions. [2022-03-01 18:42:43,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:42:43,670 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:43,670 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:43,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-01 18:42:43,883 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 [2022-03-01 18:42:43,883 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:42:43,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:43,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1393248479, now seen corresponding path program 37 times [2022-03-01 18:42:43,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:43,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692431395] [2022-03-01 18:42:43,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:43,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:43,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:43,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692431395] [2022-03-01 18:42:43,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692431395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:43,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854881335] [2022-03-01 18:42:43,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:42:43,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:43,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:43,992 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) [2022-03-01 18:42:43,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 18:42:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:44,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:42:44,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:44,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:44,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854881335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:44,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:44,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2022-03-01 18:42:44,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384661771] [2022-03-01 18:42:44,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:44,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-01 18:42:44,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:44,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-01 18:42:44,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:42:44,785 INFO L87 Difference]: Start difference. First operand 11369 states and 27831 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 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) [2022-03-01 18:42:46,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:46,288 INFO L93 Difference]: Finished difference Result 12972 states and 30945 transitions. [2022-03-01 18:42:46,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-01 18:42:46,288 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 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 33 [2022-03-01 18:42:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:46,307 INFO L225 Difference]: With dead ends: 12972 [2022-03-01 18:42:46,307 INFO L226 Difference]: Without dead ends: 12972 [2022-03-01 18:42:46,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3545 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2658, Invalid=8898, Unknown=0, NotChecked=0, Total=11556 [2022-03-01 18:42:46,309 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 494 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:46,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 251 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:42:46,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12972 states. [2022-03-01 18:42:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12972 to 10915. [2022-03-01 18:42:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10915 states, 10914 states have (on average 2.455011911306579) internal successors, (26794), 10914 states have internal predecessors, (26794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10915 states to 10915 states and 26794 transitions. [2022-03-01 18:42:46,475 INFO L78 Accepts]: Start accepts. Automaton has 10915 states and 26794 transitions. Word has length 33 [2022-03-01 18:42:46,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:46,475 INFO L470 AbstractCegarLoop]: Abstraction has 10915 states and 26794 transitions. [2022-03-01 18:42:46,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 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) [2022-03-01 18:42:46,475 INFO L276 IsEmpty]: Start isEmpty. Operand 10915 states and 26794 transitions. [2022-03-01 18:42:46,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:42:46,486 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:46,486 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:46,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:46,701 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 [2022-03-01 18:42:46,701 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:42:46,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:46,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1039636493, now seen corresponding path program 38 times [2022-03-01 18:42:46,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:46,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905194712] [2022-03-01 18:42:46,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:46,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:46,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:46,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905194712] [2022-03-01 18:42:46,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905194712] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:46,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598812529] [2022-03-01 18:42:46,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:42:46,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:46,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:46,787 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) [2022-03-01 18:42:46,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 18:42:46,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:42:46,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:46,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:42:46,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:47,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:47,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598812529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:47,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:47,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 31 [2022-03-01 18:42:47,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544057534] [2022-03-01 18:42:47,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:47,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:42:47,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:47,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:42:47,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:42:47,354 INFO L87 Difference]: Start difference. First operand 10915 states and 26794 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:48,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:48,693 INFO L93 Difference]: Finished difference Result 11524 states and 27953 transitions. [2022-03-01 18:42:48,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-01 18:42:48,694 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:42:48,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:48,711 INFO L225 Difference]: With dead ends: 11524 [2022-03-01 18:42:48,711 INFO L226 Difference]: Without dead ends: 11520 [2022-03-01 18:42:48,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3332 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2919, Invalid=7793, Unknown=0, NotChecked=0, Total=10712 [2022-03-01 18:42:48,713 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 322 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:48,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 102 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:42:48,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11520 states. [2022-03-01 18:42:48,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11520 to 10874. [2022-03-01 18:42:48,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10874 states, 10873 states have (on average 2.4531408075048287) internal successors, (26673), 10873 states have internal predecessors, (26673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10874 states to 10874 states and 26673 transitions. [2022-03-01 18:42:48,879 INFO L78 Accepts]: Start accepts. Automaton has 10874 states and 26673 transitions. Word has length 33 [2022-03-01 18:42:48,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:48,880 INFO L470 AbstractCegarLoop]: Abstraction has 10874 states and 26673 transitions. [2022-03-01 18:42:48,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:48,880 INFO L276 IsEmpty]: Start isEmpty. Operand 10874 states and 26673 transitions. [2022-03-01 18:42:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:42:48,891 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:48,891 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:48,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:49,107 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 [2022-03-01 18:42:49,107 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:42:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:49,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2068346637, now seen corresponding path program 39 times [2022-03-01 18:42:49,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:49,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624606217] [2022-03-01 18:42:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:49,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:49,344 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:49,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624606217] [2022-03-01 18:42:49,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624606217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:49,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842544109] [2022-03-01 18:42:49,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:42:49,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:49,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:49,346 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) [2022-03-01 18:42:49,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 18:42:49,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 18:42:49,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:49,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:42:49,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:49,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:50,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842544109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:50,370 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:50,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 45 [2022-03-01 18:42:50,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746568802] [2022-03-01 18:42:50,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:50,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-01 18:42:50,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:50,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-01 18:42:50,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:42:50,373 INFO L87 Difference]: Start difference. First operand 10874 states and 26673 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:00,080 INFO L93 Difference]: Finished difference Result 14204 states and 34076 transitions. [2022-03-01 18:43:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-03-01 18:43:00,080 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:43:00,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:00,100 INFO L225 Difference]: With dead ends: 14204 [2022-03-01 18:43:00,101 INFO L226 Difference]: Without dead ends: 14039 [2022-03-01 18:43:00,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23795 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=6830, Invalid=56422, Unknown=0, NotChecked=0, Total=63252 [2022-03-01 18:43:00,105 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 940 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 3596 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 3957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 3596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:00,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 607 Invalid, 3957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 3596 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-01 18:43:00,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14039 states. [2022-03-01 18:43:00,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14039 to 12176. [2022-03-01 18:43:00,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12176 states, 12175 states have (on average 2.4552772073921973) internal successors, (29893), 12175 states have internal predecessors, (29893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:00,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12176 states to 12176 states and 29893 transitions. [2022-03-01 18:43:00,346 INFO L78 Accepts]: Start accepts. Automaton has 12176 states and 29893 transitions. Word has length 33 [2022-03-01 18:43:00,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:00,346 INFO L470 AbstractCegarLoop]: Abstraction has 12176 states and 29893 transitions. [2022-03-01 18:43:00,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:00,347 INFO L276 IsEmpty]: Start isEmpty. Operand 12176 states and 29893 transitions. [2022-03-01 18:43:00,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:43:00,358 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:00,358 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:00,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:00,571 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 [2022-03-01 18:43:00,571 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:43:00,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:00,572 INFO L85 PathProgramCache]: Analyzing trace with hash -226544083, now seen corresponding path program 40 times [2022-03-01 18:43:00,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:00,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422497872] [2022-03-01 18:43:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:00,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:00,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:00,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422497872] [2022-03-01 18:43:00,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422497872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:00,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841903121] [2022-03-01 18:43:00,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:43:00,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:00,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:00,891 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) [2022-03-01 18:43:00,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 18:43:00,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:43:00,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:00,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:43:00,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:01,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:03,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841903121] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:03,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:03,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 16] total 40 [2022-03-01 18:43:03,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319060503] [2022-03-01 18:43:03,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:03,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:43:03,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:03,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:43:03,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:43:03,413 INFO L87 Difference]: Start difference. First operand 12176 states and 29893 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:16,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:16,274 INFO L93 Difference]: Finished difference Result 18035 states and 43408 transitions. [2022-03-01 18:43:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-01 18:43:16,274 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:43:16,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:16,304 INFO L225 Difference]: With dead ends: 18035 [2022-03-01 18:43:16,304 INFO L226 Difference]: Without dead ends: 17960 [2022-03-01 18:43:16,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8150 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=4479, Invalid=18473, Unknown=0, NotChecked=0, Total=22952 [2022-03-01 18:43:16,306 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 653 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:16,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 333 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1770 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:43:16,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17960 states. [2022-03-01 18:43:16,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17960 to 13359. [2022-03-01 18:43:16,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13359 states, 13358 states have (on average 2.4353196586315318) internal successors, (32531), 13358 states have internal predecessors, (32531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:16,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13359 states to 13359 states and 32531 transitions. [2022-03-01 18:43:16,595 INFO L78 Accepts]: Start accepts. Automaton has 13359 states and 32531 transitions. Word has length 33 [2022-03-01 18:43:16,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:16,595 INFO L470 AbstractCegarLoop]: Abstraction has 13359 states and 32531 transitions. [2022-03-01 18:43:16,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:16,595 INFO L276 IsEmpty]: Start isEmpty. Operand 13359 states and 32531 transitions. [2022-03-01 18:43:16,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:43:16,608 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:16,608 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:16,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:16,825 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 [2022-03-01 18:43:16,825 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:43:16,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:16,826 INFO L85 PathProgramCache]: Analyzing trace with hash -420701097, now seen corresponding path program 41 times [2022-03-01 18:43:16,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:16,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403257194] [2022-03-01 18:43:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:16,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:43:16,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:16,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403257194] [2022-03-01 18:43:16,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403257194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:16,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707646161] [2022-03-01 18:43:16,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:43:16,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:16,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:16,935 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) [2022-03-01 18:43:16,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 18:43:16,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-01 18:43:16,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:16,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:43:16,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:43:17,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:18,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707646161] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:18,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:18,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 15] total 32 [2022-03-01 18:43:18,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051115875] [2022-03-01 18:43:18,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:18,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:43:18,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:18,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:43:18,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:43:18,198 INFO L87 Difference]: Start difference. First operand 13359 states and 32531 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:19,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:19,514 INFO L93 Difference]: Finished difference Result 14697 states and 35526 transitions. [2022-03-01 18:43:19,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 18:43:19,514 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:43:19,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:19,537 INFO L225 Difference]: With dead ends: 14697 [2022-03-01 18:43:19,538 INFO L226 Difference]: Without dead ends: 14691 [2022-03-01 18:43:19,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2251 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1713, Invalid=4929, Unknown=0, NotChecked=0, Total=6642 [2022-03-01 18:43:19,538 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 366 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:19,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 169 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:43:19,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14691 states. [2022-03-01 18:43:19,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14691 to 13470. [2022-03-01 18:43:19,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13470 states, 13469 states have (on average 2.432994283168758) internal successors, (32770), 13469 states have internal predecessors, (32770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:19,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13470 states to 13470 states and 32770 transitions. [2022-03-01 18:43:19,747 INFO L78 Accepts]: Start accepts. Automaton has 13470 states and 32770 transitions. Word has length 33 [2022-03-01 18:43:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:19,747 INFO L470 AbstractCegarLoop]: Abstraction has 13470 states and 32770 transitions. [2022-03-01 18:43:19,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 13470 states and 32770 transitions. [2022-03-01 18:43:19,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:43:19,763 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:19,764 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:19,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-01 18:43:19,979 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 [2022-03-01 18:43:19,980 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:43:19,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:19,980 INFO L85 PathProgramCache]: Analyzing trace with hash -971038451, now seen corresponding path program 42 times [2022-03-01 18:43:19,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:19,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215531169] [2022-03-01 18:43:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:19,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:20,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:20,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215531169] [2022-03-01 18:43:20,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215531169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:20,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695144344] [2022-03-01 18:43:20,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:43:20,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:20,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:20,178 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) [2022-03-01 18:43:20,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 18:43:20,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 18:43:20,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:20,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-01 18:43:20,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:20,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:21,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695144344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:21,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:21,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-03-01 18:43:21,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699754189] [2022-03-01 18:43:21,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:21,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-01 18:43:21,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:21,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-01 18:43:21,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1661, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:43:21,587 INFO L87 Difference]: Start difference. First operand 13470 states and 32770 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:35,480 INFO L93 Difference]: Finished difference Result 19054 states and 45384 transitions. [2022-03-01 18:43:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-03-01 18:43:35,484 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:43:35,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:35,512 INFO L225 Difference]: With dead ends: 19054 [2022-03-01 18:43:35,512 INFO L226 Difference]: Without dead ends: 19045 [2022-03-01 18:43:35,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23019 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=8705, Invalid=45817, Unknown=0, NotChecked=0, Total=54522 [2022-03-01 18:43:35,516 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1186 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 652 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:35,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1186 Valid, 411 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1987 Invalid, 0 Unknown, 652 Unchecked, 1.1s Time] [2022-03-01 18:43:35,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19045 states. [2022-03-01 18:43:35,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19045 to 13793. [2022-03-01 18:43:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13793 states, 13792 states have (on average 2.4365574245939676) internal successors, (33605), 13792 states have internal predecessors, (33605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:35,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13793 states to 13793 states and 33605 transitions. [2022-03-01 18:43:35,812 INFO L78 Accepts]: Start accepts. Automaton has 13793 states and 33605 transitions. Word has length 35 [2022-03-01 18:43:35,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:35,812 INFO L470 AbstractCegarLoop]: Abstraction has 13793 states and 33605 transitions. [2022-03-01 18:43:35,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:35,813 INFO L276 IsEmpty]: Start isEmpty. Operand 13793 states and 33605 transitions. [2022-03-01 18:43:35,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:43:35,829 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:35,829 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:35,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-01 18:43:36,043 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 [2022-03-01 18:43:36,043 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:43:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:36,044 INFO L85 PathProgramCache]: Analyzing trace with hash 255734751, now seen corresponding path program 43 times [2022-03-01 18:43:36,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:36,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887131207] [2022-03-01 18:43:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:36,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:36,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:36,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887131207] [2022-03-01 18:43:36,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887131207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:36,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99390529] [2022-03-01 18:43:36,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:43:36,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:36,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:36,323 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) [2022-03-01 18:43:36,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 18:43:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:36,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-01 18:43:36,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:37,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:39,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99390529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:39,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:39,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-03-01 18:43:39,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348986018] [2022-03-01 18:43:39,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:39,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-01 18:43:39,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:39,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-01 18:43:39,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1766, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:43:39,026 INFO L87 Difference]: Start difference. First operand 13793 states and 33605 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:15,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:15,977 INFO L93 Difference]: Finished difference Result 20048 states and 47741 transitions. [2022-03-01 18:44:15,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2022-03-01 18:44:15,977 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:44:15,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:16,007 INFO L225 Difference]: With dead ends: 20048 [2022-03-01 18:44:16,008 INFO L226 Difference]: Without dead ends: 20011 [2022-03-01 18:44:16,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 27278 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=10703, Invalid=52549, Unknown=0, NotChecked=0, Total=63252 [2022-03-01 18:44:16,011 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1342 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 2438 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 2438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:16,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1342 Valid, 541 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 2438 Invalid, 0 Unknown, 379 Unchecked, 1.4s Time] [2022-03-01 18:44:16,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20011 states. [2022-03-01 18:44:16,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20011 to 14278. [2022-03-01 18:44:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14278 states, 14277 states have (on average 2.436856482454297) internal successors, (34791), 14277 states have internal predecessors, (34791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:16,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14278 states to 14278 states and 34791 transitions. [2022-03-01 18:44:16,299 INFO L78 Accepts]: Start accepts. Automaton has 14278 states and 34791 transitions. Word has length 35 [2022-03-01 18:44:16,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:16,300 INFO L470 AbstractCegarLoop]: Abstraction has 14278 states and 34791 transitions. [2022-03-01 18:44:16,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:16,300 INFO L276 IsEmpty]: Start isEmpty. Operand 14278 states and 34791 transitions. [2022-03-01 18:44:16,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:44:16,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:16,317 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:16,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-01 18:44:16,529 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 [2022-03-01 18:44:16,530 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:44:16,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:16,530 INFO L85 PathProgramCache]: Analyzing trace with hash 975083881, now seen corresponding path program 44 times [2022-03-01 18:44:16,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:16,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498708510] [2022-03-01 18:44:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:16,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:16,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:16,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498708510] [2022-03-01 18:44:16,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498708510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:16,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896628262] [2022-03-01 18:44:16,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:44:16,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:16,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:16,812 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) [2022-03-01 18:44:16,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 18:44:16,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:44:16,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:16,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-01 18:44:16,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:17,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:19,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896628262] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:19,794 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:19,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-03-01 18:44:19,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068744898] [2022-03-01 18:44:19,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:19,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-01 18:44:19,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:19,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-01 18:44:19,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1789, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:44:19,795 INFO L87 Difference]: Start difference. First operand 14278 states and 34791 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:56,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:56,680 INFO L93 Difference]: Finished difference Result 21356 states and 50836 transitions. [2022-03-01 18:44:56,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-03-01 18:44:56,680 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:44:56,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:56,714 INFO L225 Difference]: With dead ends: 21356 [2022-03-01 18:44:56,714 INFO L226 Difference]: Without dead ends: 21320 [2022-03-01 18:44:56,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 49 SyntacticMatches, 38 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 27665 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=9930, Invalid=46476, Unknown=0, NotChecked=0, Total=56406 [2022-03-01 18:44:56,719 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1379 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 3311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:56,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1379 Valid, 490 Invalid, 3311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 2450 Invalid, 0 Unknown, 449 Unchecked, 1.5s Time] [2022-03-01 18:44:56,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21320 states. [2022-03-01 18:44:57,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21320 to 14773. [2022-03-01 18:44:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14773 states, 14772 states have (on average 2.437855402112104) internal successors, (36012), 14772 states have internal predecessors, (36012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:57,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14773 states to 14773 states and 36012 transitions. [2022-03-01 18:44:57,043 INFO L78 Accepts]: Start accepts. Automaton has 14773 states and 36012 transitions. Word has length 35 [2022-03-01 18:44:57,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:57,045 INFO L470 AbstractCegarLoop]: Abstraction has 14773 states and 36012 transitions. [2022-03-01 18:44:57,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:57,045 INFO L276 IsEmpty]: Start isEmpty. Operand 14773 states and 36012 transitions. [2022-03-01 18:44:57,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:44:57,063 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:57,063 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:57,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:57,271 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 [2022-03-01 18:44:57,271 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:44:57,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:57,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1746633437, now seen corresponding path program 45 times [2022-03-01 18:44:57,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:57,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220469198] [2022-03-01 18:44:57,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:57,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:57,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:57,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220469198] [2022-03-01 18:44:57,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220469198] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:57,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300265632] [2022-03-01 18:44:57,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:44:57,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:57,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:57,494 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) [2022-03-01 18:44:57,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 18:44:57,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 18:44:57,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:57,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 18:44:57,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:57,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:57,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300265632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:57,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:57,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-01 18:44:57,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853716641] [2022-03-01 18:44:57,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:57,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:44:57,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:57,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:44:57,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:44:57,864 INFO L87 Difference]: Start difference. First operand 14773 states and 36012 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:00,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:45:00,158 INFO L93 Difference]: Finished difference Result 24704 states and 59667 transitions. [2022-03-01 18:45:00,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-01 18:45:00,158 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:45:00,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:45:00,280 INFO L225 Difference]: With dead ends: 24704 [2022-03-01 18:45:00,280 INFO L226 Difference]: Without dead ends: 24291 [2022-03-01 18:45:00,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5937 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2825, Invalid=14467, Unknown=0, NotChecked=0, Total=17292 [2022-03-01 18:45:00,284 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 724 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:45:00,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 264 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:45:00,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24291 states. [2022-03-01 18:45:00,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24291 to 18100. [2022-03-01 18:45:00,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18100 states, 18099 states have (on average 2.420188960716062) internal successors, (43803), 18099 states have internal predecessors, (43803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18100 states to 18100 states and 43803 transitions. [2022-03-01 18:45:00,571 INFO L78 Accepts]: Start accepts. Automaton has 18100 states and 43803 transitions. Word has length 35 [2022-03-01 18:45:00,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:45:00,572 INFO L470 AbstractCegarLoop]: Abstraction has 18100 states and 43803 transitions. [2022-03-01 18:45:00,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 18100 states and 43803 transitions. [2022-03-01 18:45:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:45:00,590 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:45:00,590 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:45:00,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-01 18:45:00,806 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 [2022-03-01 18:45:00,806 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:45:00,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:45:00,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1003263075, now seen corresponding path program 46 times [2022-03-01 18:45:00,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:45:00,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561970529] [2022-03-01 18:45:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:45:00,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:45:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:45:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:01,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:45:01,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561970529] [2022-03-01 18:45:01,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561970529] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:45:01,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298420997] [2022-03-01 18:45:01,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:45:01,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:45:01,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:45:01,116 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) [2022-03-01 18:45:01,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 18:45:01,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:45:01,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:45:01,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-01 18:45:01,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:45:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:02,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:45:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:02,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298420997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:45:02,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:45:02,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-03-01 18:45:02,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483263552] [2022-03-01 18:45:02,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:45:02,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-01 18:45:02,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:45:02,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-01 18:45:02,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1699, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:45:02,790 INFO L87 Difference]: Start difference. First operand 18100 states and 43803 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:45:21,281 INFO L93 Difference]: Finished difference Result 27518 states and 64706 transitions. [2022-03-01 18:45:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-03-01 18:45:21,282 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:45:21,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:45:21,329 INFO L225 Difference]: With dead ends: 27518 [2022-03-01 18:45:21,329 INFO L226 Difference]: Without dead ends: 27191 [2022-03-01 18:45:21,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 50 SyntacticMatches, 21 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41306 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=13048, Invalid=77252, Unknown=0, NotChecked=0, Total=90300 [2022-03-01 18:45:21,335 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1031 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 2858 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 3887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 565 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:45:21,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1031 Valid, 514 Invalid, 3887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2858 Invalid, 0 Unknown, 565 Unchecked, 1.4s Time] [2022-03-01 18:45:21,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27191 states. [2022-03-01 18:45:21,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27191 to 18718. [2022-03-01 18:45:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18718 states, 18717 states have (on average 2.421702195864722) internal successors, (45327), 18717 states have internal predecessors, (45327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18718 states to 18718 states and 45327 transitions. [2022-03-01 18:45:21,714 INFO L78 Accepts]: Start accepts. Automaton has 18718 states and 45327 transitions. Word has length 35 [2022-03-01 18:45:21,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:45:21,714 INFO L470 AbstractCegarLoop]: Abstraction has 18718 states and 45327 transitions. [2022-03-01 18:45:21,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:21,714 INFO L276 IsEmpty]: Start isEmpty. Operand 18718 states and 45327 transitions. [2022-03-01 18:45:21,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:45:21,732 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:45:21,732 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:45:21,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-01 18:45:21,948 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 [2022-03-01 18:45:21,948 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:45:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:45:21,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1962410595, now seen corresponding path program 47 times [2022-03-01 18:45:21,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:45:21,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117100026] [2022-03-01 18:45:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:45:21,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:45:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:45:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:22,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:45:22,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117100026] [2022-03-01 18:45:22,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117100026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:45:22,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280094376] [2022-03-01 18:45:22,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:45:22,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:45:22,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:45:22,285 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) [2022-03-01 18:45:22,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 18:45:22,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 18:45:22,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:45:22,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-01 18:45:22,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:45:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:23,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:45:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:23,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280094376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:45:23,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:45:23,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-03-01 18:45:23,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278318729] [2022-03-01 18:45:23,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:45:23,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-01 18:45:23,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:45:23,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-01 18:45:23,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:45:23,535 INFO L87 Difference]: Start difference. First operand 18718 states and 45327 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:36,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:45:36,509 INFO L93 Difference]: Finished difference Result 27149 states and 64467 transitions. [2022-03-01 18:45:36,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-03-01 18:45:36,509 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:45:36,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:45:36,563 INFO L225 Difference]: With dead ends: 27149 [2022-03-01 18:45:36,563 INFO L226 Difference]: Without dead ends: 26998 [2022-03-01 18:45:36,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 50 SyntacticMatches, 27 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27364 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=9504, Invalid=48818, Unknown=0, NotChecked=0, Total=58322 [2022-03-01 18:45:36,567 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 841 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 2224 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 3393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 2224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 808 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:45:36,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 396 Invalid, 3393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 2224 Invalid, 0 Unknown, 808 Unchecked, 1.1s Time] [2022-03-01 18:45:36,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26998 states. [2022-03-01 18:45:36,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26998 to 19461. [2022-03-01 18:45:36,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19461 states, 19460 states have (on average 2.4192702980472767) internal successors, (47079), 19460 states have internal predecessors, (47079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19461 states to 19461 states and 47079 transitions. [2022-03-01 18:45:36,992 INFO L78 Accepts]: Start accepts. Automaton has 19461 states and 47079 transitions. Word has length 35 [2022-03-01 18:45:36,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:45:36,993 INFO L470 AbstractCegarLoop]: Abstraction has 19461 states and 47079 transitions. [2022-03-01 18:45:36,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:45:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand 19461 states and 47079 transitions. [2022-03-01 18:45:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:45:37,014 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:45:37,014 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:45:37,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-01 18:45:37,235 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 [2022-03-01 18:45:37,237 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:45:37,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:45:37,238 INFO L85 PathProgramCache]: Analyzing trace with hash 893229107, now seen corresponding path program 48 times [2022-03-01 18:45:37,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:45:37,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728112832] [2022-03-01 18:45:37,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:45:37,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:45:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:45:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:37,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:45:37,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728112832] [2022-03-01 18:45:37,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728112832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:45:37,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292685744] [2022-03-01 18:45:37,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:45:37,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:45:37,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:45:37,557 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) [2022-03-01 18:45:37,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 18:45:37,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 18:45:37,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:45:37,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-01 18:45:37,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:45:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:38,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:45:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:45:40,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292685744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:45:40,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:45:40,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-03-01 18:45:40,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938474739] [2022-03-01 18:45:40,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:45:40,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-01 18:45:40,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:45:40,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-01 18:45:40,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:45:40,336 INFO L87 Difference]: Start difference. First operand 19461 states and 47079 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:46:20,600 INFO L93 Difference]: Finished difference Result 42567 states and 102196 transitions. [2022-03-01 18:46:20,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2022-03-01 18:46:20,600 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:46:20,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:46:20,691 INFO L225 Difference]: With dead ends: 42567 [2022-03-01 18:46:20,691 INFO L226 Difference]: Without dead ends: 42462 [2022-03-01 18:46:20,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 35066 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=12667, Invalid=68843, Unknown=0, NotChecked=0, Total=81510 [2022-03-01 18:46:20,711 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 969 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 3326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 696 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:46:20,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 459 Invalid, 3326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 2170 Invalid, 0 Unknown, 696 Unchecked, 1.3s Time] [2022-03-01 18:46:20,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42462 states. [2022-03-01 18:46:21,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42462 to 20181. [2022-03-01 18:46:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20181 states, 20180 states have (on average 2.415312190287413) internal successors, (48741), 20180 states have internal predecessors, (48741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:21,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20181 states to 20181 states and 48741 transitions. [2022-03-01 18:46:21,321 INFO L78 Accepts]: Start accepts. Automaton has 20181 states and 48741 transitions. Word has length 35 [2022-03-01 18:46:21,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:46:21,321 INFO L470 AbstractCegarLoop]: Abstraction has 20181 states and 48741 transitions. [2022-03-01 18:46:21,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:21,322 INFO L276 IsEmpty]: Start isEmpty. Operand 20181 states and 48741 transitions. [2022-03-01 18:46:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:46:21,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:46:21,345 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:46:21,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-01 18:46:21,559 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 [2022-03-01 18:46:21,559 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:46:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:46:21,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1057414301, now seen corresponding path program 49 times [2022-03-01 18:46:21,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:46:21,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854762784] [2022-03-01 18:46:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:46:21,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:46:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:46:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:21,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:46:21,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854762784] [2022-03-01 18:46:21,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854762784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:46:21,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300375049] [2022-03-01 18:46:21,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:46:21,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:46:21,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:46:21,859 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) [2022-03-01 18:46:21,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 18:46:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:46:21,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-01 18:46:21,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:46:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:22,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:46:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:23,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300375049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:46:23,505 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:46:23,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-03-01 18:46:23,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932307741] [2022-03-01 18:46:23,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:46:23,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-01 18:46:23,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:46:23,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-01 18:46:23,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:46:23,506 INFO L87 Difference]: Start difference. First operand 20181 states and 48741 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:38,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:46:38,342 INFO L93 Difference]: Finished difference Result 31595 states and 75036 transitions. [2022-03-01 18:46:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2022-03-01 18:46:38,342 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:46:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:46:38,401 INFO L225 Difference]: With dead ends: 31595 [2022-03-01 18:46:38,401 INFO L226 Difference]: Without dead ends: 31391 [2022-03-01 18:46:38,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 58 SyntacticMatches, 14 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30424 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=10357, Invalid=57503, Unknown=0, NotChecked=0, Total=67860 [2022-03-01 18:46:38,406 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 948 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 3485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:46:38,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [948 Valid, 634 Invalid, 3485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 2598 Invalid, 0 Unknown, 528 Unchecked, 1.3s Time] [2022-03-01 18:46:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31391 states. [2022-03-01 18:46:38,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31391 to 20619. [2022-03-01 18:46:38,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20619 states, 20618 states have (on average 2.412212629741003) internal successors, (49735), 20618 states have internal predecessors, (49735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:38,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20619 states to 20619 states and 49735 transitions. [2022-03-01 18:46:38,873 INFO L78 Accepts]: Start accepts. Automaton has 20619 states and 49735 transitions. Word has length 35 [2022-03-01 18:46:38,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:46:38,874 INFO L470 AbstractCegarLoop]: Abstraction has 20619 states and 49735 transitions. [2022-03-01 18:46:38,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:38,874 INFO L276 IsEmpty]: Start isEmpty. Operand 20619 states and 49735 transitions. [2022-03-01 18:46:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:46:38,895 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:46:38,895 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:46:38,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-01 18:46:39,112 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 [2022-03-01 18:46:39,112 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:46:39,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:46:39,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1794931811, now seen corresponding path program 50 times [2022-03-01 18:46:39,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:46:39,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228139741] [2022-03-01 18:46:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:46:39,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:46:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:46:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:39,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:46:39,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228139741] [2022-03-01 18:46:39,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228139741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:46:39,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88531465] [2022-03-01 18:46:39,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:46:39,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:46:39,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:46:39,340 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) [2022-03-01 18:46:39,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 18:46:39,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:46:39,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:46:39,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 18:46:39,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:46:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:40,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:46:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:41,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88531465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:46:41,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:46:41,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 17] total 41 [2022-03-01 18:46:41,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013817181] [2022-03-01 18:46:41,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:46:41,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-01 18:46:41,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:46:41,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-01 18:46:41,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1377, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:46:41,238 INFO L87 Difference]: Start difference. First operand 20619 states and 49735 transitions. Second operand has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:48,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:46:48,696 INFO L93 Difference]: Finished difference Result 31800 states and 75366 transitions. [2022-03-01 18:46:48,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-01 18:46:48,696 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:46:48,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:46:48,751 INFO L225 Difference]: With dead ends: 31800 [2022-03-01 18:46:48,751 INFO L226 Difference]: Without dead ends: 31773 [2022-03-01 18:46:48,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8298 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4887, Invalid=17165, Unknown=0, NotChecked=0, Total=22052 [2022-03-01 18:46:48,752 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 700 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1828 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:46:48,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 328 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1828 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:46:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31773 states. [2022-03-01 18:46:49,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31773 to 24756. [2022-03-01 18:46:49,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24756 states, 24755 states have (on average 2.4244395071702685) internal successors, (60017), 24755 states have internal predecessors, (60017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:49,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24756 states to 24756 states and 60017 transitions. [2022-03-01 18:46:49,200 INFO L78 Accepts]: Start accepts. Automaton has 24756 states and 60017 transitions. Word has length 35 [2022-03-01 18:46:49,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:46:49,200 INFO L470 AbstractCegarLoop]: Abstraction has 24756 states and 60017 transitions. [2022-03-01 18:46:49,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:49,200 INFO L276 IsEmpty]: Start isEmpty. Operand 24756 states and 60017 transitions. [2022-03-01 18:46:49,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:46:49,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:46:49,222 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:46:49,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-01 18:46:49,436 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 [2022-03-01 18:46:49,437 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:46:49,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:46:49,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1064565901, now seen corresponding path program 51 times [2022-03-01 18:46:49,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:46:49,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634338824] [2022-03-01 18:46:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:46:49,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:46:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:46:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:49,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:46:49,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634338824] [2022-03-01 18:46:49,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634338824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:46:49,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741530200] [2022-03-01 18:46:49,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:46:49,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:46:49,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:46:49,624 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) [2022-03-01 18:46:49,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 18:46:49,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-01 18:46:49,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:46:49,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-01 18:46:49,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:46:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:50,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:46:51,376 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:51,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741530200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:46:51,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:46:51,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 39 [2022-03-01 18:46:51,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593677986] [2022-03-01 18:46:51,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:46:51,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:46:51,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:46:51,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:46:51,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1189, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:46:51,378 INFO L87 Difference]: Start difference. First operand 24756 states and 60017 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) [2022-03-01 18:46:54,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:46:54,794 INFO L93 Difference]: Finished difference Result 33437 states and 81132 transitions. [2022-03-01 18:46:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-01 18:46:54,795 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 35 [2022-03-01 18:46:54,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:46:54,853 INFO L225 Difference]: With dead ends: 33437 [2022-03-01 18:46:54,854 INFO L226 Difference]: Without dead ends: 33429 [2022-03-01 18:46:54,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3962 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3179, Invalid=8811, Unknown=0, NotChecked=0, Total=11990 [2022-03-01 18:46:54,855 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 370 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:46:54,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 178 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:46:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33429 states. [2022-03-01 18:46:55,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33429 to 28374. [2022-03-01 18:46:55,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28374 states, 28373 states have (on average 2.445775913720791) internal successors, (69394), 28373 states have internal predecessors, (69394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:46:55,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28374 states to 28374 states and 69394 transitions. [2022-03-01 18:46:55,473 INFO L78 Accepts]: Start accepts. Automaton has 28374 states and 69394 transitions. Word has length 35 [2022-03-01 18:46:55,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:46:55,474 INFO L470 AbstractCegarLoop]: Abstraction has 28374 states and 69394 transitions. [2022-03-01 18:46:55,474 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) [2022-03-01 18:46:55,474 INFO L276 IsEmpty]: Start isEmpty. Operand 28374 states and 69394 transitions. [2022-03-01 18:46:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:46:55,496 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:46:55,496 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:46:55,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-01 18:46:55,708 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 [2022-03-01 18:46:55,708 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:46:55,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:46:55,709 INFO L85 PathProgramCache]: Analyzing trace with hash -968336091, now seen corresponding path program 52 times [2022-03-01 18:46:55,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:46:55,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640849363] [2022-03-01 18:46:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:46:55,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:46:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:46:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:55,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:46:55,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640849363] [2022-03-01 18:46:55,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640849363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:46:55,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388041517] [2022-03-01 18:46:55,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:46:55,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:46:55,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:46:55,988 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) [2022-03-01 18:46:56,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 18:46:56,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:46:56,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:46:56,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-01 18:46:56,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:46:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:56,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:46:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:46:58,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388041517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:46:58,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:46:58,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 46 [2022-03-01 18:46:58,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378209465] [2022-03-01 18:46:58,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:46:58,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-01 18:46:58,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:46:58,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-01 18:46:58,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1683, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:46:58,591 INFO L87 Difference]: Start difference. First operand 28374 states and 69394 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:48:05,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:48:05,135 INFO L93 Difference]: Finished difference Result 76564 states and 186438 transitions. [2022-03-01 18:48:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 380 states. [2022-03-01 18:48:05,136 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:48:05,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:48:05,311 INFO L225 Difference]: With dead ends: 76564 [2022-03-01 18:48:05,311 INFO L226 Difference]: Without dead ends: 76431 [2022-03-01 18:48:05,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 78772 ImplicationChecksByTransitivity, 64.8s TimeCoverageRelationStatistics Valid=24736, Invalid=142954, Unknown=0, NotChecked=0, Total=167690 [2022-03-01 18:48:05,320 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1220 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 3390 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 5025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 3390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1108 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:48:05,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 864 Invalid, 5025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 3390 Invalid, 0 Unknown, 1108 Unchecked, 2.0s Time] [2022-03-01 18:48:05,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76431 states. [2022-03-01 18:48:06,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76431 to 35789. [2022-03-01 18:48:06,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35789 states, 35788 states have (on average 2.447831675421929) internal successors, (87603), 35788 states have internal predecessors, (87603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:48:06,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35789 states to 35789 states and 87603 transitions. [2022-03-01 18:48:06,570 INFO L78 Accepts]: Start accepts. Automaton has 35789 states and 87603 transitions. Word has length 35 [2022-03-01 18:48:06,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:48:06,570 INFO L470 AbstractCegarLoop]: Abstraction has 35789 states and 87603 transitions. [2022-03-01 18:48:06,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:48:06,570 INFO L276 IsEmpty]: Start isEmpty. Operand 35789 states and 87603 transitions. [2022-03-01 18:48:06,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:48:06,603 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:48:06,603 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:48:06,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-01 18:48:06,815 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 [2022-03-01 18:48:06,815 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:48:06,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:48:06,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1472113377, now seen corresponding path program 53 times [2022-03-01 18:48:06,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:48:06,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770281987] [2022-03-01 18:48:06,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:48:06,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:48:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:48:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:48:07,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:48:07,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770281987] [2022-03-01 18:48:07,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770281987] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:48:07,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688677954] [2022-03-01 18:48:07,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:48:07,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:48:07,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:48:07,244 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) [2022-03-01 18:48:07,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 18:48:07,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 18:48:07,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:48:07,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:48:07,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:48:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:48:07,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:48:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:48:08,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688677954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:48:08,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:48:08,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 39 [2022-03-01 18:48:08,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446430589] [2022-03-01 18:48:08,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:48:08,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-01 18:48:08,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:48:08,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-01 18:48:08,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:48:08,956 INFO L87 Difference]: Start difference. First operand 35789 states and 87603 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) 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) [2022-03-01 18:48:22,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:48:22,853 INFO L93 Difference]: Finished difference Result 51166 states and 123889 transitions. [2022-03-01 18:48:22,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-03-01 18:48:22,853 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) 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 35 [2022-03-01 18:48:22,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:48:22,974 INFO L225 Difference]: With dead ends: 51166 [2022-03-01 18:48:22,974 INFO L226 Difference]: Without dead ends: 50956 [2022-03-01 18:48:22,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16625 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=5587, Invalid=37885, Unknown=0, NotChecked=0, Total=43472 [2022-03-01 18:48:22,977 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1183 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 2724 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 3245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 2724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:48:22,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1183 Valid, 567 Invalid, 3245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 2724 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 18:48:23,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50956 states. [2022-03-01 18:48:23,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50956 to 37796. [2022-03-01 18:48:23,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37796 states, 37795 states have (on average 2.4284164572033338) internal successors, (91782), 37795 states have internal predecessors, (91782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:48:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37796 states to 37796 states and 91782 transitions. [2022-03-01 18:48:23,928 INFO L78 Accepts]: Start accepts. Automaton has 37796 states and 91782 transitions. Word has length 35 [2022-03-01 18:48:23,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:48:23,929 INFO L470 AbstractCegarLoop]: Abstraction has 37796 states and 91782 transitions. [2022-03-01 18:48:23,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) 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) [2022-03-01 18:48:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 37796 states and 91782 transitions. [2022-03-01 18:48:23,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:48:23,959 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:48:23,959 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:48:23,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-01 18:48:24,170 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 [2022-03-01 18:48:24,171 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:48:24,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:48:24,171 INFO L85 PathProgramCache]: Analyzing trace with hash 309882039, now seen corresponding path program 54 times [2022-03-01 18:48:24,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:48:24,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859675753] [2022-03-01 18:48:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:48:24,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:48:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:48:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:48:24,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:48:24,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859675753] [2022-03-01 18:48:24,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859675753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:48:24,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504868783] [2022-03-01 18:48:24,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:48:24,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:48:24,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:48:24,476 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) [2022-03-01 18:48:24,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 18:48:24,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 18:48:24,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:48:24,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-01 18:48:24,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:48:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:48:25,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:48:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:48:27,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504868783] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:48:27,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:48:27,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-03-01 18:48:27,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217099871] [2022-03-01 18:48:27,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:48:27,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-01 18:48:27,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:48:27,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-01 18:48:27,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1806, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:48:27,658 INFO L87 Difference]: Start difference. First operand 37796 states and 91782 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:49:25,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:49:25,780 INFO L93 Difference]: Finished difference Result 64315 states and 154824 transitions. [2022-03-01 18:49:25,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 392 states. [2022-03-01 18:49:25,780 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:49:25,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:49:25,943 INFO L225 Difference]: With dead ends: 64315 [2022-03-01 18:49:25,943 INFO L226 Difference]: Without dead ends: 64110 [2022-03-01 18:49:25,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 432 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 88058 ImplicationChecksByTransitivity, 56.5s TimeCoverageRelationStatistics Valid=25719, Invalid=162203, Unknown=0, NotChecked=0, Total=187922 [2022-03-01 18:49:25,955 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1339 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 3555 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 4669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 3555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 491 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:49:25,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1339 Valid, 896 Invalid, 4669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 3555 Invalid, 0 Unknown, 491 Unchecked, 2.2s Time] [2022-03-01 18:49:26,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64110 states. [2022-03-01 18:49:27,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64110 to 42957. [2022-03-01 18:49:27,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42957 states, 42956 states have (on average 2.432582177111463) internal successors, (104494), 42956 states have internal predecessors, (104494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:49:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42957 states to 42957 states and 104494 transitions. [2022-03-01 18:49:27,513 INFO L78 Accepts]: Start accepts. Automaton has 42957 states and 104494 transitions. Word has length 35 [2022-03-01 18:49:27,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:49:27,514 INFO L470 AbstractCegarLoop]: Abstraction has 42957 states and 104494 transitions. [2022-03-01 18:49:27,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:49:27,514 INFO L276 IsEmpty]: Start isEmpty. Operand 42957 states and 104494 transitions. [2022-03-01 18:49:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:49:27,550 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:49:27,550 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:49:27,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-01 18:49:27,766 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 [2022-03-01 18:49:27,766 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:49:27,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:49:27,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1619435289, now seen corresponding path program 55 times [2022-03-01 18:49:27,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:49:27,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415413579] [2022-03-01 18:49:27,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:49:27,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:49:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:49:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:49:28,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:49:28,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415413579] [2022-03-01 18:49:28,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415413579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:49:28,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315738101] [2022-03-01 18:49:28,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:49:28,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:49:28,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:49:28,157 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) [2022-03-01 18:49:28,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 18:49:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:49:28,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-01 18:49:28,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:49:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:49:29,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:49:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:49:29,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315738101] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:49:29,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:49:29,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-03-01 18:49:29,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175910609] [2022-03-01 18:49:29,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:49:29,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-01 18:49:29,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:49:29,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-01 18:49:29,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1536, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:49:29,720 INFO L87 Difference]: Start difference. First operand 42957 states and 104494 transitions. Second operand has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:49:43,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:49:43,832 INFO L93 Difference]: Finished difference Result 64001 states and 154506 transitions. [2022-03-01 18:49:43,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2022-03-01 18:49:43,832 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:49:43,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:49:43,965 INFO L225 Difference]: With dead ends: 64001 [2022-03-01 18:49:43,966 INFO L226 Difference]: Without dead ends: 63813 [2022-03-01 18:49:43,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 55 SyntacticMatches, 13 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29257 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=10278, Invalid=57062, Unknown=0, NotChecked=0, Total=67340 [2022-03-01 18:49:43,969 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 710 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 3588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 750 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:49:43,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 473 Invalid, 3588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 2564 Invalid, 0 Unknown, 750 Unchecked, 1.2s Time] [2022-03-01 18:49:44,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63813 states. [2022-03-01 18:49:44,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63813 to 43034. [2022-03-01 18:49:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43034 states, 43033 states have (on average 2.4317849092556876) internal successors, (104647), 43033 states have internal predecessors, (104647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:49:45,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43034 states to 43034 states and 104647 transitions. [2022-03-01 18:49:45,075 INFO L78 Accepts]: Start accepts. Automaton has 43034 states and 104647 transitions. Word has length 35 [2022-03-01 18:49:45,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:49:45,075 INFO L470 AbstractCegarLoop]: Abstraction has 43034 states and 104647 transitions. [2022-03-01 18:49:45,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:49:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 43034 states and 104647 transitions. [2022-03-01 18:49:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:49:45,111 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:49:45,112 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:49:45,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-01 18:49:45,321 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 [2022-03-01 18:49:45,321 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:49:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:49:45,321 INFO L85 PathProgramCache]: Analyzing trace with hash 830358429, now seen corresponding path program 56 times [2022-03-01 18:49:45,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:49:45,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712092768] [2022-03-01 18:49:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:49:45,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:49:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:49:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:49:45,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:49:45,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712092768] [2022-03-01 18:49:45,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712092768] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:49:45,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861058250] [2022-03-01 18:49:45,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:49:45,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:49:45,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:49:45,599 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) [2022-03-01 18:49:45,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 18:49:45,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:49:45,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:49:45,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-01 18:49:45,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:49:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:49:46,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:49:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:49:47,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861058250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:49:47,319 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:49:47,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 44 [2022-03-01 18:49:47,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660428066] [2022-03-01 18:49:47,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:49:47,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-01 18:49:47,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:49:47,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-01 18:49:47,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1540, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:49:47,321 INFO L87 Difference]: Start difference. First operand 43034 states and 104647 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 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) [2022-03-01 18:50:06,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:50:06,501 INFO L93 Difference]: Finished difference Result 58311 states and 140194 transitions. [2022-03-01 18:50:06,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2022-03-01 18:50:06,502 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 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 35 [2022-03-01 18:50:06,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:50:06,640 INFO L225 Difference]: With dead ends: 58311 [2022-03-01 18:50:06,640 INFO L226 Difference]: Without dead ends: 58065 [2022-03-01 18:50:06,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 54 SyntacticMatches, 19 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34136 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=11952, Invalid=62850, Unknown=0, NotChecked=0, Total=74802 [2022-03-01 18:50:06,644 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 914 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 2914 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 4127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 2914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 801 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:50:06,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 422 Invalid, 4127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 2914 Invalid, 0 Unknown, 801 Unchecked, 1.6s Time] [2022-03-01 18:50:06,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58065 states. [2022-03-01 18:50:07,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58065 to 43495. [2022-03-01 18:50:07,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43495 states, 43494 states have (on average 2.4314388191474685) internal successors, (105753), 43494 states have internal predecessors, (105753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:50:07,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43495 states to 43495 states and 105753 transitions. [2022-03-01 18:50:07,876 INFO L78 Accepts]: Start accepts. Automaton has 43495 states and 105753 transitions. Word has length 35 [2022-03-01 18:50:07,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:50:07,876 INFO L470 AbstractCegarLoop]: Abstraction has 43495 states and 105753 transitions. [2022-03-01 18:50:07,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 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) [2022-03-01 18:50:07,876 INFO L276 IsEmpty]: Start isEmpty. Operand 43495 states and 105753 transitions. [2022-03-01 18:50:07,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:50:07,911 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:50:07,911 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:50:07,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-01 18:50:08,128 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 [2022-03-01 18:50:08,128 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:50:08,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:50:08,128 INFO L85 PathProgramCache]: Analyzing trace with hash 571032451, now seen corresponding path program 57 times [2022-03-01 18:50:08,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:50:08,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422110092] [2022-03-01 18:50:08,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:50:08,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:50:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:50:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 18:50:08,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:50:08,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422110092] [2022-03-01 18:50:08,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422110092] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:50:08,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77422941] [2022-03-01 18:50:08,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:50:08,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:50:08,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:50:08,477 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) [2022-03-01 18:50:08,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 18:50:08,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-01 18:50:08,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:50:08,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-01 18:50:08,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:50:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:50:09,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:50:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:50:11,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77422941] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:50:11,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:50:11,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 18] total 44 [2022-03-01 18:50:11,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493800590] [2022-03-01 18:50:11,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:50:11,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-01 18:50:11,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:50:11,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-01 18:50:11,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1528, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:50:11,092 INFO L87 Difference]: Start difference. First operand 43495 states and 105753 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:50:34,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:50:34,020 INFO L93 Difference]: Finished difference Result 64315 states and 154285 transitions. [2022-03-01 18:50:34,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2022-03-01 18:50:34,020 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:50:34,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:50:34,154 INFO L225 Difference]: With dead ends: 64315 [2022-03-01 18:50:34,154 INFO L226 Difference]: Without dead ends: 64204 [2022-03-01 18:50:34,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 27112 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=11215, Invalid=54065, Unknown=0, NotChecked=0, Total=65280 [2022-03-01 18:50:34,158 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 999 mSDsluCounter, 1397 mSDsCounter, 0 mSdLazyCounter, 3569 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 4074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 3569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:50:34,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [999 Valid, 825 Invalid, 4074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 3569 Invalid, 0 Unknown, 133 Unchecked, 1.7s Time] [2022-03-01 18:50:34,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64204 states. [2022-03-01 18:50:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64204 to 44494. [2022-03-01 18:50:35,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44494 states, 44493 states have (on average 2.4320454903018454) internal successors, (108209), 44493 states have internal predecessors, (108209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:50:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44494 states to 44494 states and 108209 transitions. [2022-03-01 18:50:35,450 INFO L78 Accepts]: Start accepts. Automaton has 44494 states and 108209 transitions. Word has length 35 [2022-03-01 18:50:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:50:35,450 INFO L470 AbstractCegarLoop]: Abstraction has 44494 states and 108209 transitions. [2022-03-01 18:50:35,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:50:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 44494 states and 108209 transitions. [2022-03-01 18:50:35,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:50:35,483 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:50:35,483 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:50:35,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-01 18:50:35,698 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 [2022-03-01 18:50:35,699 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:50:35,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:50:35,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1391448127, now seen corresponding path program 58 times [2022-03-01 18:50:35,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:50:35,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642604706] [2022-03-01 18:50:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:50:35,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:50:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:50:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:50:35,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:50:35,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642604706] [2022-03-01 18:50:35,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642604706] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:50:35,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264706081] [2022-03-01 18:50:35,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:50:35,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:50:35,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:50:35,939 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) [2022-03-01 18:50:35,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 18:50:35,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:50:35,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:50:35,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-01 18:50:35,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:50:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:50:36,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:50:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:50:38,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264706081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:50:38,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:50:38,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 18] total 45 [2022-03-01 18:50:38,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363340046] [2022-03-01 18:50:38,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:50:38,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-01 18:50:38,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:50:38,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-01 18:50:38,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1616, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:50:38,816 INFO L87 Difference]: Start difference. First operand 44494 states and 108209 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:09,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:51:09,515 INFO L93 Difference]: Finished difference Result 64559 states and 154907 transitions. [2022-03-01 18:51:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 273 states. [2022-03-01 18:51:09,516 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:51:09,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:51:09,663 INFO L225 Difference]: With dead ends: 64559 [2022-03-01 18:51:09,663 INFO L226 Difference]: Without dead ends: 64412 [2022-03-01 18:51:09,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 42426 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=14902, Invalid=82754, Unknown=0, NotChecked=0, Total=97656 [2022-03-01 18:51:09,668 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 1005 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 3538 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 4517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 3538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 527 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:51:09,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1005 Valid, 997 Invalid, 4517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 3538 Invalid, 0 Unknown, 527 Unchecked, 1.7s Time] [2022-03-01 18:51:09,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64412 states. [2022-03-01 18:51:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64412 to 43889. [2022-03-01 18:51:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43889 states, 43888 states have (on average 2.428545388261028) internal successors, (106584), 43888 states have internal predecessors, (106584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43889 states to 43889 states and 106584 transitions. [2022-03-01 18:51:10,806 INFO L78 Accepts]: Start accepts. Automaton has 43889 states and 106584 transitions. Word has length 35 [2022-03-01 18:51:10,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:51:10,806 INFO L470 AbstractCegarLoop]: Abstraction has 43889 states and 106584 transitions. [2022-03-01 18:51:10,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:51:10,806 INFO L276 IsEmpty]: Start isEmpty. Operand 43889 states and 106584 transitions. [2022-03-01 18:51:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:51:10,841 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:51:10,841 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:51:10,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-01 18:51:11,055 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 [2022-03-01 18:51:11,056 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:51:11,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:51:11,056 INFO L85 PathProgramCache]: Analyzing trace with hash -273268249, now seen corresponding path program 59 times [2022-03-01 18:51:11,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:51:11,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739163307] [2022-03-01 18:51:11,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:51:11,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:51:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:51:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:51:11,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:51:11,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739163307] [2022-03-01 18:51:11,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739163307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:51:11,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304961407] [2022-03-01 18:51:11,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:51:11,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:51:11,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:51:11,300 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) [2022-03-01 18:51:11,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 18:51:11,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 18:51:11,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:51:11,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-01 18:51:11,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:51:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:51:12,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:51:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:51:15,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304961407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:51:15,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:51:15,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 46 [2022-03-01 18:51:15,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374335029] [2022-03-01 18:51:15,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:51:15,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-01 18:51:15,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:51:15,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-01 18:51:15,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1838, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:51:15,010 INFO L87 Difference]: Start difference. First operand 43889 states and 106584 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:52:18,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:52:18,474 INFO L93 Difference]: Finished difference Result 74873 states and 178635 transitions. [2022-03-01 18:52:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 394 states. [2022-03-01 18:52:18,475 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:52:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:52:18,662 INFO L225 Difference]: With dead ends: 74873 [2022-03-01 18:52:18,662 INFO L226 Difference]: Without dead ends: 74496 [2022-03-01 18:52:18,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 45 SyntacticMatches, 34 SemanticMatches, 434 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 92189 ImplicationChecksByTransitivity, 61.5s TimeCoverageRelationStatistics Valid=22065, Invalid=167595, Unknown=0, NotChecked=0, Total=189660 [2022-03-01 18:52:18,691 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 1741 mSDsluCounter, 2144 mSDsCounter, 0 mSdLazyCounter, 4354 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1741 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 5245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 4354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:52:18,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1741 Valid, 1202 Invalid, 5245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 4354 Invalid, 0 Unknown, 225 Unchecked, 2.4s Time] [2022-03-01 18:52:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74496 states. [2022-03-01 18:52:19,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74496 to 45129. [2022-03-01 18:52:19,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45129 states, 45128 states have (on average 2.431328665130296) internal successors, (109721), 45128 states have internal predecessors, (109721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:52:19,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45129 states to 45129 states and 109721 transitions. [2022-03-01 18:52:19,870 INFO L78 Accepts]: Start accepts. Automaton has 45129 states and 109721 transitions. Word has length 35 [2022-03-01 18:52:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:52:19,870 INFO L470 AbstractCegarLoop]: Abstraction has 45129 states and 109721 transitions. [2022-03-01 18:52:19,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:52:19,870 INFO L276 IsEmpty]: Start isEmpty. Operand 45129 states and 109721 transitions. [2022-03-01 18:52:19,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:52:19,902 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:52:19,902 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:52:19,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-01 18:52:20,115 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 [2022-03-01 18:52:20,115 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:52:20,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:52:20,116 INFO L85 PathProgramCache]: Analyzing trace with hash -521560789, now seen corresponding path program 60 times [2022-03-01 18:52:20,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:52:20,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080890027] [2022-03-01 18:52:20,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:52:20,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:52:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:52:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:52:20,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:52:20,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080890027] [2022-03-01 18:52:20,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080890027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:52:20,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746957308] [2022-03-01 18:52:20,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:52:20,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:52:20,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:52:20,316 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) [2022-03-01 18:52:20,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 18:52:20,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-01 18:52:20,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:52:20,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:52:20,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:52:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:52:21,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:52:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:52:22,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746957308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:52:22,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:52:22,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 40 [2022-03-01 18:52:22,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786557709] [2022-03-01 18:52:22,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:52:22,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:52:22,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:52:22,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:52:22,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:52:22,100 INFO L87 Difference]: Start difference. First operand 45129 states and 109721 transitions. Second operand has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:52:26,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:52:26,126 INFO L93 Difference]: Finished difference Result 55955 states and 135064 transitions. [2022-03-01 18:52:26,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-01 18:52:26,126 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:52:26,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:52:26,236 INFO L225 Difference]: With dead ends: 55955 [2022-03-01 18:52:26,236 INFO L226 Difference]: Without dead ends: 55934 [2022-03-01 18:52:26,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5087 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3347, Invalid=10695, Unknown=0, NotChecked=0, Total=14042 [2022-03-01 18:52:26,237 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 575 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:52:26,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 271 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:52:26,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55934 states. [2022-03-01 18:52:27,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55934 to 49062. [2022-03-01 18:52:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49062 states, 49061 states have (on average 2.435865555125252) internal successors, (119506), 49061 states have internal predecessors, (119506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:52:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49062 states to 49062 states and 119506 transitions. [2022-03-01 18:52:27,278 INFO L78 Accepts]: Start accepts. Automaton has 49062 states and 119506 transitions. Word has length 35 [2022-03-01 18:52:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:52:27,278 INFO L470 AbstractCegarLoop]: Abstraction has 49062 states and 119506 transitions. [2022-03-01 18:52:27,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:52:27,278 INFO L276 IsEmpty]: Start isEmpty. Operand 49062 states and 119506 transitions. [2022-03-01 18:52:27,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:52:27,315 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:52:27,315 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:52:27,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-01 18:52:27,531 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 [2022-03-01 18:52:27,531 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:52:27,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:52:27,531 INFO L85 PathProgramCache]: Analyzing trace with hash -256134681, now seen corresponding path program 61 times [2022-03-01 18:52:27,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:52:27,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162989864] [2022-03-01 18:52:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:52:27,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:52:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:52:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:52:27,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:52:27,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162989864] [2022-03-01 18:52:27,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162989864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:52:27,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290836842] [2022-03-01 18:52:27,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:52:27,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:52:27,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:52:27,704 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) [2022-03-01 18:52:27,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 18:52:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:52:27,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 18:52:27,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:52:28,482 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:52:28,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:52:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:52:30,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290836842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:52:30,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:52:30,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 18] total 43 [2022-03-01 18:52:30,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743443263] [2022-03-01 18:52:30,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:52:30,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-01 18:52:30,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:52:30,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-01 18:52:30,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1562, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:52:30,029 INFO L87 Difference]: Start difference. First operand 49062 states and 119506 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:52:36,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:52:36,094 INFO L93 Difference]: Finished difference Result 53754 states and 129377 transitions. [2022-03-01 18:52:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-01 18:52:36,094 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:52:36,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:52:36,216 INFO L225 Difference]: With dead ends: 53754 [2022-03-01 18:52:36,216 INFO L226 Difference]: Without dead ends: 53663 [2022-03-01 18:52:36,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6124 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3487, Invalid=13805, Unknown=0, NotChecked=0, Total=17292 [2022-03-01 18:52:36,217 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 634 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:52:36,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 488 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] Received shutdown request... [2022-03-01 18:52:36,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53663 states. [2022-03-01 18:52:36,270 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-01 18:52:36,273 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:52:36,285 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 [2022-03-01 18:52:36,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-01 18:52:36,473 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 [2022-03-01 18:52:36,474 WARN L594 AbstractCegarLoop]: Verification canceled: while executing MinimizeSevpa. [2022-03-01 18:52:36,477 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-01 18:52:36,478 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-01 18:52:36,493 INFO L732 BasicCegarLoop]: Path program histogram: [61, 1, 1] [2022-03-01 18:52:36,498 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 18:52:36,498 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 18:52:36,507 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 06:52:36 BasicIcfg [2022-03-01 18:52:36,507 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 18:52:36,507 INFO L158 Benchmark]: Toolchain (without parser) took 862728.59ms. Allocated memory was 182.5MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 144.1MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 744.6MB. Max. memory is 8.0GB. [2022-03-01 18:52:36,507 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 182.5MB. Free memory is still 145.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:52:36,507 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.00ms. Allocated memory is still 182.5MB. Free memory was 144.0MB in the beginning and 142.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-01 18:52:36,507 INFO L158 Benchmark]: Boogie Preprocessor took 9.20ms. Allocated memory is still 182.5MB. Free memory was 142.5MB in the beginning and 141.6MB in the end (delta: 928.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:52:36,508 INFO L158 Benchmark]: RCFGBuilder took 160.75ms. Allocated memory is still 182.5MB. Free memory was 141.5MB in the beginning and 132.5MB in the end (delta: 9.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-01 18:52:36,515 INFO L158 Benchmark]: TraceAbstraction took 862528.64ms. Allocated memory was 182.5MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 132.0MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 732.0MB. Max. memory is 8.0GB. [2022-03-01 18:52:36,516 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 0.11ms. Allocated memory is still 182.5MB. Free memory is still 145.2MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.00ms. Allocated memory is still 182.5MB. Free memory was 144.0MB in the beginning and 142.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 9.20ms. Allocated memory is still 182.5MB. Free memory was 142.5MB in the beginning and 141.6MB in the end (delta: 928.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 160.75ms. Allocated memory is still 182.5MB. Free memory was 141.5MB in the beginning and 132.5MB in the end (delta: 9.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 862528.64ms. Allocated memory was 182.5MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 132.0MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 732.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 862.4s, OverallIterations: 63, TraceHistogramMax: 5, PathProgramHistogramMax: 61, EmptinessCheckTime: 0.7s, AutomataDifference: 731.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 41812 SdHoareTripleChecker+Valid, 51.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 41812 mSDsluCounter, 23102 SdHoareTripleChecker+Invalid, 44.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 13867 IncrementalHoareTripleChecker+Unchecked, 43372 mSDsCounter, 15774 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 102617 IncrementalHoareTripleChecker+Invalid, 132258 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15774 mSolverCounterUnsat, 1303 mSDtfsCounter, 102617 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12918 GetRequests, 2563 SyntacticMatches, 367 SemanticMatches, 9988 ConstructedPredicates, 0 IntricatePredicates, 19 DeprecatedPredicates, 982224 ImplicationChecksByTransitivity, 700.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49062occurred in iteration=62, InterpolantAutomatonStates: 8289, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 18.7s AutomataMinimizationTime, 63 MinimizatonAttempts, 351745 StatesRemovedByMinimization, 62 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 95.5s InterpolantComputationTime, 3762 NumberOfCodeBlocks, 3762 NumberOfCodeBlocksAsserted, 275 NumberOfCheckSat, 5442 ConstructedInterpolants, 98 QuantifiedInterpolants, 106522 SizeOfPredicates, 513 NumberOfNonLiveVariables, 4144 ConjunctsInSsa, 1596 ConjunctsInUnsatCore, 185 InterpolantComputations, 2 PerfectInterpolantSequences, 456/6010 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