/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/figure1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.abstract-por-f0ea240 [2022-02-11 00:49:42,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 00:49:42,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 00:49:42,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-11 00:49:42,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-11 00:49:42,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-11 00:49:42,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-11 00:49:42,962 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 [2022-02-11 00:49:42,983 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 00:49:42,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 00:49:42,984 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 00:49:42,984 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 00:49:42,984 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 00:49:42,985 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 00:49:42,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 00:49:42,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 00:49:42,985 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 00:49:42,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 00:49:42,985 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 00:49:42,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 00:49:42,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 00:49:42,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 00:49:42,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 00:49:42,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 00:49:42,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 00:49:42,986 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 00:49:42,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 00:49:42,986 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 00:49:42,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 00:49:42,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 00:49:42,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 00:49:42,987 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 00:49:42,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 00:49:42,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:49:42,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 00:49:42,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 00:49:42,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 00:49:42,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 00:49:42,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 00:49:42,988 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 00:49:42,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 00:49:42,988 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 00:49:43,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 00:49:43,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 00:49:43,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 00:49:43,227 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 00:49:43,228 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 00:49:43,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl [2022-02-11 00:49:43,229 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl' [2022-02-11 00:49:43,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 00:49:43,250 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 00:49:43,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 00:49:43,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 00:49:43,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 00:49:43,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:49:43" (1/1) ... [2022-02-11 00:49:43,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:49:43" (1/1) ... [2022-02-11 00:49:43,270 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 00:49:43,271 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 00:49:43,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 00:49:43,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 00:49:43,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 00:49:43,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:49:43" (1/1) ... [2022-02-11 00:49:43,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:49:43" (1/1) ... [2022-02-11 00:49:43,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:49:43" (1/1) ... [2022-02-11 00:49:43,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:49:43" (1/1) ... [2022-02-11 00:49:43,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:49:43" (1/1) ... [2022-02-11 00:49:43,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:49:43" (1/1) ... [2022-02-11 00:49:43,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:49:43" (1/1) ... [2022-02-11 00:49:43,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 00:49:43,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 00:49:43,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 00:49:43,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 00:49:43,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:49:43" (1/1) ... [2022-02-11 00:49:43,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:49:43,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:43,308 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) [2022-02-11 00:49:43,317 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 [2022-02-11 00:49:43,348 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 00:49:43,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 00:49:43,348 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 00:49:43,349 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 00:49:43,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 00:49:43,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 00:49:43,349 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 00:49:43,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 00:49:43,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 00:49:43,350 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-11 00:49:43,388 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 00:49:43,389 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 00:49:43,482 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 00:49:43,497 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 00:49:43,498 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-11 00:49:43,499 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:49:43 BoogieIcfgContainer [2022-02-11 00:49:43,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 00:49:43,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 00:49:43,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 00:49:43,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 00:49:43,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:49:43" (1/2) ... [2022-02-11 00:49:43,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60f71d4b and model type figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 12:49:43, skipping insertion in model container [2022-02-11 00:49:43,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:49:43" (2/2) ... [2022-02-11 00:49:43,508 INFO L112 eAbstractionObserver]: Analyzing ICFG figure1.wvr.bpl [2022-02-11 00:49:43,511 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 00:49:43,511 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 00:49:43,511 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 00:49:43,511 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 00:49:43,548 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-11 00:49:43,598 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 00:49:43,606 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, 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 [2022-02-11 00:49:43,606 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-11 00:49:43,616 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2022-02-11 00:49:43,634 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:43,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:43,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-11 00:49:43,641 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:43,642 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:43,642 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:43,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:43,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1212787643, now seen corresponding path program 1 times [2022-02-11 00:49:43,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:43,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848202181] [2022-02-11 00:49:43,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:43,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:43,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:43,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848202181] [2022-02-11 00:49:43,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848202181] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:49:43,777 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:49:43,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 00:49:43,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482247489] [2022-02-11 00:49:43,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:49:43,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 00:49:43,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:43,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 00:49:43,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 00:49:43,823 INFO L87 Difference]: Start difference. First operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:43,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:43,854 INFO L93 Difference]: Finished difference Result 57 states and 100 transitions. [2022-02-11 00:49:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 00:49:43,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-11 00:49:43,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:43,862 INFO L225 Difference]: With dead ends: 57 [2022-02-11 00:49:43,862 INFO L226 Difference]: Without dead ends: 42 [2022-02-11 00:49:43,863 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 00:49:43,866 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:43,867 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:49:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-11 00:49:43,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-02-11 00:49:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 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) [2022-02-11 00:49:43,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 71 transitions. [2022-02-11 00:49:43,906 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 71 transitions. Word has length 14 [2022-02-11 00:49:43,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:43,907 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 71 transitions. [2022-02-11 00:49:43,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:43,907 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 71 transitions. [2022-02-11 00:49:43,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:49:43,907 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:43,908 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:43,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 00:49:43,908 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:43,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:43,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1488322375, now seen corresponding path program 1 times [2022-02-11 00:49:43,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:43,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241129093] [2022-02-11 00:49:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:43,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:44,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:44,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241129093] [2022-02-11 00:49:44,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241129093] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:44,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60217563] [2022-02-11 00:49:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:44,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:44,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:44,006 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) [2022-02-11 00:49:44,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-11 00:49:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:44,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 00:49:44,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:44,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:44,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60217563] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:44,257 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-11 00:49:44,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2022-02-11 00:49:44,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926346359] [2022-02-11 00:49:44,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:49:44,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:49:44,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:44,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:49:44,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:49:44,265 INFO L87 Difference]: Start difference. First operand 40 states and 71 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:44,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:44,372 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2022-02-11 00:49:44,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:49:44,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:49:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:44,378 INFO L225 Difference]: With dead ends: 75 [2022-02-11 00:49:44,378 INFO L226 Difference]: Without dead ends: 75 [2022-02-11 00:49:44,378 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:49:44,380 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:44,380 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 28 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:49:44,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-11 00:49:44,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2022-02-11 00:49:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 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) [2022-02-11 00:49:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 80 transitions. [2022-02-11 00:49:44,395 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 80 transitions. Word has length 16 [2022-02-11 00:49:44,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:44,396 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 80 transitions. [2022-02-11 00:49:44,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 80 transitions. [2022-02-11 00:49:44,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:49:44,397 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:44,397 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:44,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-11 00:49:44,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:44,598 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:44,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:44,599 INFO L85 PathProgramCache]: Analyzing trace with hash -841147161, now seen corresponding path program 2 times [2022-02-11 00:49:44,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:44,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537386395] [2022-02-11 00:49:44,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:44,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:44,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:44,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537386395] [2022-02-11 00:49:44,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537386395] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:49:44,647 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:49:44,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:49:44,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167170354] [2022-02-11 00:49:44,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:49:44,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:49:44,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:44,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:49:44,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:49:44,651 INFO L87 Difference]: Start difference. First operand 45 states and 80 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:44,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:44,713 INFO L93 Difference]: Finished difference Result 50 states and 88 transitions. [2022-02-11 00:49:44,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:49:44,713 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:49:44,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:44,714 INFO L225 Difference]: With dead ends: 50 [2022-02-11 00:49:44,714 INFO L226 Difference]: Without dead ends: 48 [2022-02-11 00:49:44,714 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:49:44,715 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:44,715 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 19 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:49:44,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-11 00:49:44,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-02-11 00:49:44,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 42 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) [2022-02-11 00:49:44,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 76 transitions. [2022-02-11 00:49:44,718 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 76 transitions. Word has length 16 [2022-02-11 00:49:44,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:44,718 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 76 transitions. [2022-02-11 00:49:44,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:44,718 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 76 transitions. [2022-02-11 00:49:44,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:49:44,719 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:44,719 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:44,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-11 00:49:44,719 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:44,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:44,720 INFO L85 PathProgramCache]: Analyzing trace with hash -976918153, now seen corresponding path program 1 times [2022-02-11 00:49:44,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:44,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046235090] [2022-02-11 00:49:44,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:44,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:44,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:44,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046235090] [2022-02-11 00:49:44,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046235090] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:44,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739394159] [2022-02-11 00:49:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:44,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:44,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:44,825 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) [2022-02-11 00:49:44,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-11 00:49:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:44,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:49:44,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:44,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:45,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739394159] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:45,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:45,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-02-11 00:49:45,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073136676] [2022-02-11 00:49:45,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:45,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:49:45,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:45,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:49:45,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:49:45,036 INFO L87 Difference]: Start difference. First operand 43 states and 76 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:45,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:45,056 INFO L93 Difference]: Finished difference Result 96 states and 173 transitions. [2022-02-11 00:49:45,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 00:49:45,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:49:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:45,057 INFO L225 Difference]: With dead ends: 96 [2022-02-11 00:49:45,057 INFO L226 Difference]: Without dead ends: 75 [2022-02-11 00:49:45,057 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:49:45,058 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:45,058 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:49:45,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-11 00:49:45,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2022-02-11 00:49:45,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:45,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 109 transitions. [2022-02-11 00:49:45,062 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 109 transitions. Word has length 18 [2022-02-11 00:49:45,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:45,062 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 109 transitions. [2022-02-11 00:49:45,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:45,062 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 109 transitions. [2022-02-11 00:49:45,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:49:45,063 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:45,063 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:45,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-11 00:49:45,282 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 [2022-02-11 00:49:45,282 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:45,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:45,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1383534453, now seen corresponding path program 2 times [2022-02-11 00:49:45,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:45,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236781371] [2022-02-11 00:49:45,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:45,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:45,357 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:45,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236781371] [2022-02-11 00:49:45,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236781371] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:45,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694534592] [2022-02-11 00:49:45,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:49:45,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:45,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:45,358 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) [2022-02-11 00:49:45,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-11 00:49:45,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:49:45,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:45,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:49:45,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:45,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:45,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694534592] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:45,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:45,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-02-11 00:49:45,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400120984] [2022-02-11 00:49:45,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:45,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:49:45,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:45,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:49:45,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:49:45,586 INFO L87 Difference]: Start difference. First operand 58 states and 109 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:45,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:45,943 INFO L93 Difference]: Finished difference Result 183 states and 329 transitions. [2022-02-11 00:49:45,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:49:45,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:49:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:45,946 INFO L225 Difference]: With dead ends: 183 [2022-02-11 00:49:45,946 INFO L226 Difference]: Without dead ends: 177 [2022-02-11 00:49:45,947 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:49:45,948 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 125 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:45,948 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 109 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:49:45,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-11 00:49:45,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 67. [2022-02-11 00:49:45,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:45,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 129 transitions. [2022-02-11 00:49:45,956 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 129 transitions. Word has length 20 [2022-02-11 00:49:45,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:45,956 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 129 transitions. [2022-02-11 00:49:45,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:45,956 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 129 transitions. [2022-02-11 00:49:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:49:45,957 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:45,957 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:45,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:46,167 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 [2022-02-11 00:49:46,168 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:46,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:46,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1633346791, now seen corresponding path program 3 times [2022-02-11 00:49:46,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:46,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207124642] [2022-02-11 00:49:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:46,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:46,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:46,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207124642] [2022-02-11 00:49:46,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207124642] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:46,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746249664] [2022-02-11 00:49:46,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:49:46,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:46,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:46,228 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) [2022-02-11 00:49:46,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-11 00:49:46,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:49:46,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:46,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-11 00:49:46,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:46,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:46,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746249664] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:46,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:46,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-02-11 00:49:46,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002784064] [2022-02-11 00:49:46,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:46,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:49:46,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:46,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:49:46,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:49:46,471 INFO L87 Difference]: Start difference. First operand 67 states and 129 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:46,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:46,718 INFO L93 Difference]: Finished difference Result 145 states and 267 transitions. [2022-02-11 00:49:46,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:49:46,719 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:49:46,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:46,719 INFO L225 Difference]: With dead ends: 145 [2022-02-11 00:49:46,719 INFO L226 Difference]: Without dead ends: 141 [2022-02-11 00:49:46,720 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:49:46,720 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 108 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:46,721 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 51 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:49:46,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-02-11 00:49:46,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 66. [2022-02-11 00:49:46,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:46,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2022-02-11 00:49:46,725 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 20 [2022-02-11 00:49:46,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:46,725 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2022-02-11 00:49:46,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:46,725 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2022-02-11 00:49:46,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:49:46,726 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:46,726 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:46,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:46,939 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 [2022-02-11 00:49:46,939 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:46,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:46,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1508489523, now seen corresponding path program 4 times [2022-02-11 00:49:46,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:46,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842091851] [2022-02-11 00:49:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:46,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:46,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:46,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842091851] [2022-02-11 00:49:46,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842091851] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:46,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517669829] [2022-02-11 00:49:46,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:49:46,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:46,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:46,992 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) [2022-02-11 00:49:46,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-11 00:49:47,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:49:47,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:47,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-11 00:49:47,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:47,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:47,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517669829] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:47,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:47,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-02-11 00:49:47,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808275437] [2022-02-11 00:49:47,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:47,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:49:47,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:47,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:49:47,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:49:47,158 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:47,185 INFO L93 Difference]: Finished difference Result 162 states and 309 transitions. [2022-02-11 00:49:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:49:47,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:49:47,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:47,188 INFO L225 Difference]: With dead ends: 162 [2022-02-11 00:49:47,188 INFO L226 Difference]: Without dead ends: 135 [2022-02-11 00:49:47,188 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:49:47,188 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:47,189 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 80 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:49:47,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-02-11 00:49:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2022-02-11 00:49:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2022-02-11 00:49:47,193 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 22 [2022-02-11 00:49:47,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:47,193 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2022-02-11 00:49:47,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2022-02-11 00:49:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:47,194 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:47,194 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:47,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:47,394 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 [2022-02-11 00:49:47,395 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:47,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:47,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1228681265, now seen corresponding path program 5 times [2022-02-11 00:49:47,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:47,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089205898] [2022-02-11 00:49:47,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:47,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:47,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:47,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089205898] [2022-02-11 00:49:47,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089205898] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:47,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277734409] [2022-02-11 00:49:47,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:49:47,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:47,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:47,504 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) [2022-02-11 00:49:47,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-11 00:49:47,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:49:47,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:47,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-11 00:49:47,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:47,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:47,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277734409] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:47,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:47,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-11 00:49:47,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640878125] [2022-02-11 00:49:47,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:47,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:49:47,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:47,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:49:47,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:49:47,800 INFO L87 Difference]: Start difference. First operand 105 states and 213 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:48,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:48,344 INFO L93 Difference]: Finished difference Result 383 states and 726 transitions. [2022-02-11 00:49:48,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:49:48,345 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:49:48,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:48,346 INFO L225 Difference]: With dead ends: 383 [2022-02-11 00:49:48,346 INFO L226 Difference]: Without dead ends: 347 [2022-02-11 00:49:48,347 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=652, Invalid=1798, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:49:48,347 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 225 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:48,348 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 116 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:49:48,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-02-11 00:49:48,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 92. [2022-02-11 00:49:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 179 transitions. [2022-02-11 00:49:48,353 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 179 transitions. Word has length 24 [2022-02-11 00:49:48,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:48,353 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 179 transitions. [2022-02-11 00:49:48,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:48,353 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 179 transitions. [2022-02-11 00:49:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:49:48,354 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:48,354 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:48,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:48,570 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 [2022-02-11 00:49:48,571 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:48,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:48,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1864859111, now seen corresponding path program 6 times [2022-02-11 00:49:48,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:48,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561822348] [2022-02-11 00:49:48,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:48,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:48,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:48,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:48,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561822348] [2022-02-11 00:49:48,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561822348] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:48,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350642290] [2022-02-11 00:49:48,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:49:48,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:48,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:48,627 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) [2022-02-11 00:49:48,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-11 00:49:48,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-11 00:49:48,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:48,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-11 00:49:48,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:48,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:48,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350642290] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:48,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:48,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-02-11 00:49:48,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882910116] [2022-02-11 00:49:48,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:48,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:49:48,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:49:48,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:49:48,901 INFO L87 Difference]: Start difference. First operand 92 states and 179 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:49,322 INFO L93 Difference]: Finished difference Result 239 states and 453 transitions. [2022-02-11 00:49:49,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:49:49,323 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:49:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:49,324 INFO L225 Difference]: With dead ends: 239 [2022-02-11 00:49:49,324 INFO L226 Difference]: Without dead ends: 235 [2022-02-11 00:49:49,324 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:49:49,325 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 177 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:49,325 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 71 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:49:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-02-11 00:49:49,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 84. [2022-02-11 00:49:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 83 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:49,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 164 transitions. [2022-02-11 00:49:49,328 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 164 transitions. Word has length 24 [2022-02-11 00:49:49,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:49,328 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 164 transitions. [2022-02-11 00:49:49,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:49,328 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 164 transitions. [2022-02-11 00:49:49,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-11 00:49:49,329 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:49,329 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:49,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:49,543 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 [2022-02-11 00:49:49,544 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:49,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:49,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1276536081, now seen corresponding path program 7 times [2022-02-11 00:49:49,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:49,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184192628] [2022-02-11 00:49:49,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:49,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:49,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:49,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184192628] [2022-02-11 00:49:49,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184192628] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:49,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428688697] [2022-02-11 00:49:49,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:49:49,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:49,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:49,603 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) [2022-02-11 00:49:49,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-11 00:49:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:49,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:49:49,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:49,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:49,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428688697] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:49,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:49,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-02-11 00:49:49,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233983370] [2022-02-11 00:49:49,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:49,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:49:49,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:49,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:49:49,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:49:49,776 INFO L87 Difference]: Start difference. First operand 84 states and 164 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:49,815 INFO L93 Difference]: Finished difference Result 221 states and 426 transitions. [2022-02-11 00:49:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 00:49:49,815 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-11 00:49:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:49,816 INFO L225 Difference]: With dead ends: 221 [2022-02-11 00:49:49,816 INFO L226 Difference]: Without dead ends: 188 [2022-02-11 00:49:49,816 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:49:49,816 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:49,817 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 132 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:49:49,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-11 00:49:49,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2022-02-11 00:49:49,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.0833333333333335) internal successors, (300), 144 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:49,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 300 transitions. [2022-02-11 00:49:49,820 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 300 transitions. Word has length 26 [2022-02-11 00:49:49,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:49,820 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 300 transitions. [2022-02-11 00:49:49,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:49,821 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 300 transitions. [2022-02-11 00:49:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-11 00:49:49,821 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:49,821 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:49,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-11 00:49:50,035 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 [2022-02-11 00:49:50,036 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:50,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:50,036 INFO L85 PathProgramCache]: Analyzing trace with hash 923558637, now seen corresponding path program 8 times [2022-02-11 00:49:50,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:50,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400371021] [2022-02-11 00:49:50,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:50,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:50,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:50,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400371021] [2022-02-11 00:49:50,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400371021] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:50,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504927195] [2022-02-11 00:49:50,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:49:50,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:50,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:50,126 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) [2022-02-11 00:49:50,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-11 00:49:50,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:49:50,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:50,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-11 00:49:50,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:50,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:50,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504927195] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:50,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:50,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-02-11 00:49:50,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222073610] [2022-02-11 00:49:50,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:50,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:49:50,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:50,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:49:50,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:49:50,461 INFO L87 Difference]: Start difference. First operand 145 states and 300 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:51,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:51,342 INFO L93 Difference]: Finished difference Result 613 states and 1172 transitions. [2022-02-11 00:49:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:49:51,343 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-11 00:49:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:51,345 INFO L225 Difference]: With dead ends: 613 [2022-02-11 00:49:51,345 INFO L226 Difference]: Without dead ends: 520 [2022-02-11 00:49:51,347 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1238, Invalid=3592, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 00:49:51,348 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 385 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:51,348 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 137 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:49:51,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-02-11 00:49:51,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 114. [2022-02-11 00:49:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.991150442477876) internal successors, (225), 113 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 225 transitions. [2022-02-11 00:49:51,353 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 225 transitions. Word has length 28 [2022-02-11 00:49:51,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:51,353 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 225 transitions. [2022-02-11 00:49:51,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 225 transitions. [2022-02-11 00:49:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-11 00:49:51,354 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:51,354 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:51,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-02-11 00:49:51,570 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 [2022-02-11 00:49:51,570 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:51,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:51,571 INFO L85 PathProgramCache]: Analyzing trace with hash -805165081, now seen corresponding path program 9 times [2022-02-11 00:49:51,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:51,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100216455] [2022-02-11 00:49:51,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:51,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:51,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:51,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100216455] [2022-02-11 00:49:51,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100216455] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:51,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065603218] [2022-02-11 00:49:51,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:49:51,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:51,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:51,645 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) [2022-02-11 00:49:51,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-11 00:49:51,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-11 00:49:51,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:51,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-11 00:49:51,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:51,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:52,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065603218] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:52,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:52,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-02-11 00:49:52,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762480030] [2022-02-11 00:49:52,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:52,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:49:52,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:52,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:49:52,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:49:52,009 INFO L87 Difference]: Start difference. First operand 114 states and 225 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:52,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:52,611 INFO L93 Difference]: Finished difference Result 351 states and 677 transitions. [2022-02-11 00:49:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:49:52,612 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-11 00:49:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:52,613 INFO L225 Difference]: With dead ends: 351 [2022-02-11 00:49:52,613 INFO L226 Difference]: Without dead ends: 347 [2022-02-11 00:49:52,614 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=981, Invalid=2441, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 00:49:52,614 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 268 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:52,614 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 59 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:49:52,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-02-11 00:49:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 102. [2022-02-11 00:49:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2022-02-11 00:49:52,618 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 28 [2022-02-11 00:49:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:52,618 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2022-02-11 00:49:52,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:52,618 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2022-02-11 00:49:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:52,618 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:52,619 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:52,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:52,835 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 [2022-02-11 00:49:52,836 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:52,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:52,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1853361835, now seen corresponding path program 10 times [2022-02-11 00:49:52,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:52,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98390825] [2022-02-11 00:49:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:52,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:52,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:52,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98390825] [2022-02-11 00:49:52,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98390825] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:52,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034422787] [2022-02-11 00:49:52,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:49:52,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:52,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:52,901 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) [2022-02-11 00:49:52,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-11 00:49:52,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:49:52,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:52,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:49:52,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:53,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:53,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034422787] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:53,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:53,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-02-11 00:49:53,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437782193] [2022-02-11 00:49:53,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:53,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:49:53,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:53,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:49:53,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:49:53,096 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:53,174 INFO L93 Difference]: Finished difference Result 280 states and 543 transitions. [2022-02-11 00:49:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:49:53,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:53,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:53,175 INFO L225 Difference]: With dead ends: 280 [2022-02-11 00:49:53,176 INFO L226 Difference]: Without dead ends: 241 [2022-02-11 00:49:53,176 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:49:53,176 INFO L934 BasicCegarLoop]: 40 mSDtfsCounter, 38 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:53,176 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 198 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:49:53,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-02-11 00:49:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 185. [2022-02-11 00:49:53,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1032608695652173) internal successors, (387), 184 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 387 transitions. [2022-02-11 00:49:53,184 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 387 transitions. Word has length 30 [2022-02-11 00:49:53,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:53,184 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 387 transitions. [2022-02-11 00:49:53,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 387 transitions. [2022-02-11 00:49:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 00:49:53,184 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:53,184 INFO L515 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:53,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:53,395 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 [2022-02-11 00:49:53,395 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1831163991, now seen corresponding path program 11 times [2022-02-11 00:49:53,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:53,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71549268] [2022-02-11 00:49:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:53,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:53,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:53,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71549268] [2022-02-11 00:49:53,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71549268] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:53,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491127587] [2022-02-11 00:49:53,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:49:53,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:53,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:53,513 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) [2022-02-11 00:49:53,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-11 00:49:53,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-11 00:49:53,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:53,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-11 00:49:53,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:53,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:53,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491127587] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:53,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:53,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-11 00:49:53,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857239822] [2022-02-11 00:49:53,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:53,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:49:53,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:53,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:49:53,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:49:53,891 INFO L87 Difference]: Start difference. First operand 185 states and 387 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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) [2022-02-11 00:49:55,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:55,256 INFO L93 Difference]: Finished difference Result 889 states and 1704 transitions. [2022-02-11 00:49:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-11 00:49:55,256 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 32 [2022-02-11 00:49:55,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:55,258 INFO L225 Difference]: With dead ends: 889 [2022-02-11 00:49:55,259 INFO L226 Difference]: Without dead ends: 724 [2022-02-11 00:49:55,260 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2535 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2144, Invalid=6412, Unknown=0, NotChecked=0, Total=8556 [2022-02-11 00:49:55,261 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 372 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:55,261 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 160 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:49:55,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-02-11 00:49:55,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 136. [2022-02-11 00:49:55,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 135 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 271 transitions. [2022-02-11 00:49:55,266 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 271 transitions. Word has length 32 [2022-02-11 00:49:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:55,266 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 271 transitions. [2022-02-11 00:49:55,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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) [2022-02-11 00:49:55,266 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 271 transitions. [2022-02-11 00:49:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-11 00:49:55,266 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:55,267 INFO L515 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:55,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-02-11 00:49:55,479 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 [2022-02-11 00:49:55,479 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:55,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:55,480 INFO L85 PathProgramCache]: Analyzing trace with hash 102376167, now seen corresponding path program 12 times [2022-02-11 00:49:55,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:55,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608243159] [2022-02-11 00:49:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:55,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:55,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:55,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608243159] [2022-02-11 00:49:55,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608243159] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:55,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572798917] [2022-02-11 00:49:55,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:49:55,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:55,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:55,556 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) [2022-02-11 00:49:55,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-11 00:49:55,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-02-11 00:49:55,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:55,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-11 00:49:55,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:55,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:55,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572798917] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:55,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:55,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-02-11 00:49:55,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128402704] [2022-02-11 00:49:55,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:55,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:49:55,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:55,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:49:55,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:49:55,988 INFO L87 Difference]: Start difference. First operand 136 states and 271 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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) [2022-02-11 00:49:56,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:56,855 INFO L93 Difference]: Finished difference Result 485 states and 945 transitions. [2022-02-11 00:49:56,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:49:56,855 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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 32 [2022-02-11 00:49:56,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:56,857 INFO L225 Difference]: With dead ends: 485 [2022-02-11 00:49:56,857 INFO L226 Difference]: Without dead ends: 481 [2022-02-11 00:49:56,858 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1634, Invalid=4218, Unknown=0, NotChecked=0, Total=5852 [2022-02-11 00:49:56,859 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 356 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:56,859 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 85 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:49:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-02-11 00:49:56,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 120. [2022-02-11 00:49:56,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0168067226890756) internal successors, (240), 119 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 240 transitions. [2022-02-11 00:49:56,864 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 240 transitions. Word has length 32 [2022-02-11 00:49:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:56,865 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 240 transitions. [2022-02-11 00:49:56,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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) [2022-02-11 00:49:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 240 transitions. [2022-02-11 00:49:56,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-11 00:49:56,866 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:56,866 INFO L515 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:56,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:57,079 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 [2022-02-11 00:49:57,079 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:57,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:57,080 INFO L85 PathProgramCache]: Analyzing trace with hash 264770663, now seen corresponding path program 13 times [2022-02-11 00:49:57,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:57,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133371861] [2022-02-11 00:49:57,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:57,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:57,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:57,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133371861] [2022-02-11 00:49:57,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133371861] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:57,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145424994] [2022-02-11 00:49:57,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:49:57,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:57,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:57,151 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) [2022-02-11 00:49:57,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-11 00:49:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:57,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:49:57,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:57,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:57,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145424994] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:57,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:57,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-02-11 00:49:57,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419127529] [2022-02-11 00:49:57,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:57,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-11 00:49:57,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:57,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-11 00:49:57,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:49:57,375 INFO L87 Difference]: Start difference. First operand 120 states and 240 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:57,469 INFO L93 Difference]: Finished difference Result 339 states and 660 transitions. [2022-02-11 00:49:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:49:57,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-11 00:49:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:57,471 INFO L225 Difference]: With dead ends: 339 [2022-02-11 00:49:57,471 INFO L226 Difference]: Without dead ends: 294 [2022-02-11 00:49:57,471 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:49:57,472 INFO L934 BasicCegarLoop]: 47 mSDtfsCounter, 47 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:57,472 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 278 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:49:57,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-02-11 00:49:57,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 225. [2022-02-11 00:49:57,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.1160714285714284) internal successors, (474), 224 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:57,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 474 transitions. [2022-02-11 00:49:57,477 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 474 transitions. Word has length 34 [2022-02-11 00:49:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:57,478 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 474 transitions. [2022-02-11 00:49:57,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 474 transitions. [2022-02-11 00:49:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-11 00:49:57,478 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:57,479 INFO L515 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:57,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:57,707 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 [2022-02-11 00:49:57,707 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:57,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:57,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1625686427, now seen corresponding path program 14 times [2022-02-11 00:49:57,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:57,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229251783] [2022-02-11 00:49:57,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:57,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:57,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:57,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229251783] [2022-02-11 00:49:57,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229251783] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:57,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151335142] [2022-02-11 00:49:57,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:49:57,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:57,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:57,830 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) [2022-02-11 00:49:57,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-11 00:49:57,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:49:57,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:57,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:49:57,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:58,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:58,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151335142] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:58,307 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:58,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2022-02-11 00:49:58,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153554381] [2022-02-11 00:49:58,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:58,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:49:58,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:58,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:49:58,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:49:58,309 INFO L87 Difference]: Start difference. First operand 225 states and 474 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:00,150 INFO L93 Difference]: Finished difference Result 1205 states and 2312 transitions. [2022-02-11 00:50:00,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-11 00:50:00,151 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-11 00:50:00,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:00,153 INFO L225 Difference]: With dead ends: 1205 [2022-02-11 00:50:00,154 INFO L226 Difference]: Without dead ends: 956 [2022-02-11 00:50:00,156 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4408 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3470, Invalid=10572, Unknown=0, NotChecked=0, Total=14042 [2022-02-11 00:50:00,157 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 455 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:00,157 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 197 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:50:00,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-02-11 00:50:00,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 158. [2022-02-11 00:50:00,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.0191082802547773) internal successors, (317), 157 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:00,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 317 transitions. [2022-02-11 00:50:00,169 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 317 transitions. Word has length 36 [2022-02-11 00:50:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:00,169 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 317 transitions. [2022-02-11 00:50:00,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:00,169 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 317 transitions. [2022-02-11 00:50:00,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-11 00:50:00,170 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:00,170 INFO L515 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:00,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:00,386 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 [2022-02-11 00:50:00,386 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:00,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:00,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2129744153, now seen corresponding path program 15 times [2022-02-11 00:50:00,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:00,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141659762] [2022-02-11 00:50:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:00,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:00,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:00,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141659762] [2022-02-11 00:50:00,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141659762] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:00,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156748757] [2022-02-11 00:50:00,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:50:00,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:00,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:00,502 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) [2022-02-11 00:50:00,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-11 00:50:00,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-02-11 00:50:00,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:00,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:50:00,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:00,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:01,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156748757] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:01,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:01,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-02-11 00:50:01,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226425968] [2022-02-11 00:50:01,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:01,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 00:50:01,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:01,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 00:50:01,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:50:01,045 INFO L87 Difference]: Start difference. First operand 158 states and 317 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:02,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:02,327 INFO L93 Difference]: Finished difference Result 641 states and 1257 transitions. [2022-02-11 00:50:02,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-11 00:50:02,327 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-11 00:50:02,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:02,329 INFO L225 Difference]: With dead ends: 641 [2022-02-11 00:50:02,329 INFO L226 Difference]: Without dead ends: 637 [2022-02-11 00:50:02,331 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2833 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2553, Invalid=6759, Unknown=0, NotChecked=0, Total=9312 [2022-02-11 00:50:02,331 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 432 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:02,331 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 85 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:50:02,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-02-11 00:50:02,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 138. [2022-02-11 00:50:02,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 137 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 278 transitions. [2022-02-11 00:50:02,336 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 278 transitions. Word has length 36 [2022-02-11 00:50:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:02,336 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 278 transitions. [2022-02-11 00:50:02,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:02,336 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 278 transitions. [2022-02-11 00:50:02,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-11 00:50:02,336 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:02,336 INFO L515 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:02,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:02,549 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 [2022-02-11 00:50:02,550 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:02,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:02,550 INFO L85 PathProgramCache]: Analyzing trace with hash 160214051, now seen corresponding path program 16 times [2022-02-11 00:50:02,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:02,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134507145] [2022-02-11 00:50:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:02,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:02,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:02,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134507145] [2022-02-11 00:50:02,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134507145] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:02,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661693547] [2022-02-11 00:50:02,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:50:02,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:02,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:02,655 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) [2022-02-11 00:50:02,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-11 00:50:02,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:50:02,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:02,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 00:50:02,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:02,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:02,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661693547] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:02,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:02,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-02-11 00:50:02,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236997027] [2022-02-11 00:50:02,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:02,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 00:50:02,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:02,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 00:50:02,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:50:02,937 INFO L87 Difference]: Start difference. First operand 138 states and 278 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:03,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:03,040 INFO L93 Difference]: Finished difference Result 398 states and 777 transitions. [2022-02-11 00:50:03,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:50:03,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-11 00:50:03,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:03,041 INFO L225 Difference]: With dead ends: 398 [2022-02-11 00:50:03,041 INFO L226 Difference]: Without dead ends: 347 [2022-02-11 00:50:03,041 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:50:03,042 INFO L934 BasicCegarLoop]: 54 mSDtfsCounter, 56 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:03,042 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 372 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:50:03,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-02-11 00:50:03,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2022-02-11 00:50:03,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.125) internal successors, (561), 264 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:03,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 561 transitions. [2022-02-11 00:50:03,046 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 561 transitions. Word has length 38 [2022-02-11 00:50:03,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:03,046 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 561 transitions. [2022-02-11 00:50:03,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:03,046 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 561 transitions. [2022-02-11 00:50:03,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-11 00:50:03,047 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:03,047 INFO L515 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:03,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:03,263 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 [2022-02-11 00:50:03,263 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:03,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1774020385, now seen corresponding path program 17 times [2022-02-11 00:50:03,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:03,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410443629] [2022-02-11 00:50:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:03,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:03,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:03,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410443629] [2022-02-11 00:50:03,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410443629] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:03,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558867284] [2022-02-11 00:50:03,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:50:03,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:03,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:03,414 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) [2022-02-11 00:50:03,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-11 00:50:03,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-02-11 00:50:03,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:03,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 00:50:03,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:03,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:03,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558867284] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:03,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:03,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-02-11 00:50:03,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168537646] [2022-02-11 00:50:03,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:03,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-11 00:50:03,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:03,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-11 00:50:03,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:50:03,950 INFO L87 Difference]: Start difference. First operand 265 states and 561 transitions. Second operand has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:06,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:06,544 INFO L93 Difference]: Finished difference Result 1561 states and 2996 transitions. [2022-02-11 00:50:06,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-11 00:50:06,544 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-11 00:50:06,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:06,547 INFO L225 Difference]: With dead ends: 1561 [2022-02-11 00:50:06,547 INFO L226 Difference]: Without dead ends: 1216 [2022-02-11 00:50:06,549 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7201 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5330, Invalid=16426, Unknown=0, NotChecked=0, Total=21756 [2022-02-11 00:50:06,550 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 540 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:06,550 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 218 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:50:06,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2022-02-11 00:50:06,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 180. [2022-02-11 00:50:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.0279329608938546) internal successors, (363), 179 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 363 transitions. [2022-02-11 00:50:06,556 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 363 transitions. Word has length 40 [2022-02-11 00:50:06,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:06,556 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 363 transitions. [2022-02-11 00:50:06,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:06,556 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 363 transitions. [2022-02-11 00:50:06,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-11 00:50:06,557 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:06,557 INFO L515 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:06,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:06,769 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 [2022-02-11 00:50:06,770 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:06,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:06,770 INFO L85 PathProgramCache]: Analyzing trace with hash -504427545, now seen corresponding path program 18 times [2022-02-11 00:50:06,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:06,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917338305] [2022-02-11 00:50:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:06,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:06,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:06,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917338305] [2022-02-11 00:50:06,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917338305] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:06,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061462891] [2022-02-11 00:50:06,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:50:06,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:06,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:06,873 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) [2022-02-11 00:50:06,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-11 00:50:06,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-02-11 00:50:06,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:06,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 00:50:06,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:07,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:07,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061462891] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:07,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:07,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 39 [2022-02-11 00:50:07,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969642677] [2022-02-11 00:50:07,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:07,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-11 00:50:07,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:07,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-11 00:50:07,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1156, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:50:07,491 INFO L87 Difference]: Start difference. First operand 180 states and 363 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:09,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:09,100 INFO L93 Difference]: Finished difference Result 819 states and 1613 transitions. [2022-02-11 00:50:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-11 00:50:09,100 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-11 00:50:09,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:09,103 INFO L225 Difference]: With dead ends: 819 [2022-02-11 00:50:09,103 INFO L226 Difference]: Without dead ends: 815 [2022-02-11 00:50:09,104 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4486 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3799, Invalid=10243, Unknown=0, NotChecked=0, Total=14042 [2022-02-11 00:50:09,105 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 394 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:09,105 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 100 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:50:09,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-02-11 00:50:09,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 156. [2022-02-11 00:50:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.0387096774193547) internal successors, (316), 155 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:09,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 316 transitions. [2022-02-11 00:50:09,109 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 316 transitions. Word has length 40 [2022-02-11 00:50:09,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:09,109 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 316 transitions. [2022-02-11 00:50:09,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:09,110 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 316 transitions. [2022-02-11 00:50:09,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-11 00:50:09,110 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:09,110 INFO L515 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:09,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:09,328 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 [2022-02-11 00:50:09,329 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:09,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:09,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1191651873, now seen corresponding path program 19 times [2022-02-11 00:50:09,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:09,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682499635] [2022-02-11 00:50:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:09,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:09,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:09,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682499635] [2022-02-11 00:50:09,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682499635] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:09,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024297161] [2022-02-11 00:50:09,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:50:09,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:09,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:09,414 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) [2022-02-11 00:50:09,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-11 00:50:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:09,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:50:09,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:09,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:09,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024297161] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:09,694 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:09,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-02-11 00:50:09,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540466413] [2022-02-11 00:50:09,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:09,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:50:09,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:09,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:50:09,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:50:09,695 INFO L87 Difference]: Start difference. First operand 156 states and 316 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:09,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:09,814 INFO L93 Difference]: Finished difference Result 457 states and 894 transitions. [2022-02-11 00:50:09,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:50:09,814 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-02-11 00:50:09,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:09,815 INFO L225 Difference]: With dead ends: 457 [2022-02-11 00:50:09,815 INFO L226 Difference]: Without dead ends: 400 [2022-02-11 00:50:09,816 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:50:09,816 INFO L934 BasicCegarLoop]: 61 mSDtfsCounter, 65 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:09,816 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 480 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:50:09,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-02-11 00:50:09,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 305. [2022-02-11 00:50:09,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.1315789473684212) internal successors, (648), 304 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 648 transitions. [2022-02-11 00:50:09,821 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 648 transitions. Word has length 42 [2022-02-11 00:50:09,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:09,821 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 648 transitions. [2022-02-11 00:50:09,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 648 transitions. [2022-02-11 00:50:09,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-11 00:50:09,821 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:09,822 INFO L515 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:09,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:10,035 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 [2022-02-11 00:50:10,035 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:10,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:10,036 INFO L85 PathProgramCache]: Analyzing trace with hash -868752931, now seen corresponding path program 20 times [2022-02-11 00:50:10,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:10,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561273215] [2022-02-11 00:50:10,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:10,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:10,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:10,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561273215] [2022-02-11 00:50:10,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561273215] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:10,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100198944] [2022-02-11 00:50:10,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:50:10,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:10,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:10,223 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) [2022-02-11 00:50:10,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-11 00:50:10,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:50:10,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:10,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:50:10,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:10,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:10,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100198944] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:10,867 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:10,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 45 [2022-02-11 00:50:10,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322224107] [2022-02-11 00:50:10,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:10,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-11 00:50:10,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:10,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-11 00:50:10,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:50:10,868 INFO L87 Difference]: Start difference. First operand 305 states and 648 transitions. Second operand has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:14,174 INFO L93 Difference]: Finished difference Result 1957 states and 3756 transitions. [2022-02-11 00:50:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-02-11 00:50:14,174 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-11 00:50:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:14,178 INFO L225 Difference]: With dead ends: 1957 [2022-02-11 00:50:14,178 INFO L226 Difference]: Without dead ends: 1504 [2022-02-11 00:50:14,180 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11183 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7852, Invalid=24368, Unknown=0, NotChecked=0, Total=32220 [2022-02-11 00:50:14,180 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 597 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:14,180 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 227 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:50:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2022-02-11 00:50:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 202. [2022-02-11 00:50:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.0348258706467663) internal successors, (409), 201 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 409 transitions. [2022-02-11 00:50:14,188 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 409 transitions. Word has length 44 [2022-02-11 00:50:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:14,188 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 409 transitions. [2022-02-11 00:50:14,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 409 transitions. [2022-02-11 00:50:14,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-11 00:50:14,189 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:14,189 INFO L515 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:14,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:14,403 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 [2022-02-11 00:50:14,403 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:14,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1060796903, now seen corresponding path program 21 times [2022-02-11 00:50:14,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:14,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865666862] [2022-02-11 00:50:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:14,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:14,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:14,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865666862] [2022-02-11 00:50:14,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865666862] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:14,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123536164] [2022-02-11 00:50:14,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:50:14,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:14,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:14,516 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) [2022-02-11 00:50:14,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-11 00:50:14,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-02-11 00:50:14,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:14,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:50:14,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:14,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:15,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123536164] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:15,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:15,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19, 19] total 44 [2022-02-11 00:50:15,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955080416] [2022-02-11 00:50:15,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:15,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-11 00:50:15,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:15,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-11 00:50:15,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1475, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:50:15,223 INFO L87 Difference]: Start difference. First operand 202 states and 409 transitions. Second operand has 45 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 44 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:17,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:17,377 INFO L93 Difference]: Finished difference Result 1019 states and 2013 transitions. [2022-02-11 00:50:17,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-11 00:50:17,377 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 44 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-02-11 00:50:17,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:17,380 INFO L225 Difference]: With dead ends: 1019 [2022-02-11 00:50:17,380 INFO L226 Difference]: Without dead ends: 1015 [2022-02-11 00:50:17,381 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6777 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5439, Invalid=14867, Unknown=0, NotChecked=0, Total=20306 [2022-02-11 00:50:17,382 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 761 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:17,382 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 105 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:50:17,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-02-11 00:50:17,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 174. [2022-02-11 00:50:17,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.046242774566474) internal successors, (354), 173 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 354 transitions. [2022-02-11 00:50:17,386 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 354 transitions. Word has length 44 [2022-02-11 00:50:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:17,387 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 354 transitions. [2022-02-11 00:50:17,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 44 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:17,387 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 354 transitions. [2022-02-11 00:50:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-11 00:50:17,387 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:17,387 INFO L515 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:17,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:17,607 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 [2022-02-11 00:50:17,607 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:17,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1723830683, now seen corresponding path program 22 times [2022-02-11 00:50:17,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:17,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534527774] [2022-02-11 00:50:17,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:17,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:17,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:17,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534527774] [2022-02-11 00:50:17,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534527774] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:17,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981695155] [2022-02-11 00:50:17,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:50:17,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:17,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:17,738 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) [2022-02-11 00:50:17,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-11 00:50:17,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:50:17,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:17,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:50:17,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:17,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:18,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981695155] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:18,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:18,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-02-11 00:50:18,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203110292] [2022-02-11 00:50:18,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:18,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 00:50:18,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:18,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 00:50:18,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:50:18,009 INFO L87 Difference]: Start difference. First operand 174 states and 354 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:18,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:18,181 INFO L93 Difference]: Finished difference Result 516 states and 1011 transitions. [2022-02-11 00:50:18,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:50:18,181 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-02-11 00:50:18,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:18,183 INFO L225 Difference]: With dead ends: 516 [2022-02-11 00:50:18,183 INFO L226 Difference]: Without dead ends: 453 [2022-02-11 00:50:18,183 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:50:18,183 INFO L934 BasicCegarLoop]: 68 mSDtfsCounter, 74 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:18,184 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 602 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:50:18,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-02-11 00:50:18,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 345. [2022-02-11 00:50:18,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.136627906976744) internal successors, (735), 344 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:18,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 735 transitions. [2022-02-11 00:50:18,190 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 735 transitions. Word has length 46 [2022-02-11 00:50:18,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:18,190 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 735 transitions. [2022-02-11 00:50:18,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:18,190 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 735 transitions. [2022-02-11 00:50:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-11 00:50:18,191 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:18,191 INFO L515 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:18,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-02-11 00:50:18,403 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 [2022-02-11 00:50:18,403 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:18,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:18,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1803316889, now seen corresponding path program 23 times [2022-02-11 00:50:18,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:18,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579355263] [2022-02-11 00:50:18,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:18,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:18,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:18,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579355263] [2022-02-11 00:50:18,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579355263] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:18,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069200539] [2022-02-11 00:50:18,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:50:18,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:18,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:18,611 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) [2022-02-11 00:50:18,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-11 00:50:18,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-02-11 00:50:18,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:18,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:50:18,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:19,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:19,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069200539] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:19,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:19,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 50 [2022-02-11 00:50:19,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50148514] [2022-02-11 00:50:19,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:19,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-11 00:50:19,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:19,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-11 00:50:19,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=2062, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:50:19,294 INFO L87 Difference]: Start difference. First operand 345 states and 735 transitions. Second operand has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 50 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:23,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:23,524 INFO L93 Difference]: Finished difference Result 2393 states and 4592 transitions. [2022-02-11 00:50:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-02-11 00:50:23,524 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 50 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-11 00:50:23,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:23,529 INFO L225 Difference]: With dead ends: 2393 [2022-02-11 00:50:23,529 INFO L226 Difference]: Without dead ends: 1820 [2022-02-11 00:50:23,531 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16669 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=11178, Invalid=34832, Unknown=0, NotChecked=0, Total=46010 [2022-02-11 00:50:23,532 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 744 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:23,532 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 265 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:50:23,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2022-02-11 00:50:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 224. [2022-02-11 00:50:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0403587443946187) internal successors, (455), 223 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 455 transitions. [2022-02-11 00:50:23,540 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 455 transitions. Word has length 48 [2022-02-11 00:50:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:23,540 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 455 transitions. [2022-02-11 00:50:23,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 50 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 455 transitions. [2022-02-11 00:50:23,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-11 00:50:23,540 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:23,541 INFO L515 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:23,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:23,756 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 [2022-02-11 00:50:23,757 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:23,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:23,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1759525095, now seen corresponding path program 24 times [2022-02-11 00:50:23,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:23,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645266689] [2022-02-11 00:50:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:23,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:23,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:23,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645266689] [2022-02-11 00:50:23,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645266689] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:23,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189499687] [2022-02-11 00:50:23,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:50:23,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:23,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:23,886 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) [2022-02-11 00:50:23,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-11 00:50:23,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-02-11 00:50:23,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:23,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:50:23,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:24,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:24,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189499687] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:24,694 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:24,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 21] total 49 [2022-02-11 00:50:24,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478155704] [2022-02-11 00:50:24,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:24,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-11 00:50:24,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:24,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-11 00:50:24,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1833, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:50:24,695 INFO L87 Difference]: Start difference. First operand 224 states and 455 transitions. Second operand has 50 states, 50 states have (on average 2.44) internal successors, (122), 49 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:27,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:27,369 INFO L93 Difference]: Finished difference Result 1241 states and 2457 transitions. [2022-02-11 00:50:27,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-02-11 00:50:27,370 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.44) internal successors, (122), 49 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-11 00:50:27,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:27,373 INFO L225 Difference]: With dead ends: 1241 [2022-02-11 00:50:27,373 INFO L226 Difference]: Without dead ends: 1237 [2022-02-11 00:50:27,374 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9856 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7546, Invalid=20846, Unknown=0, NotChecked=0, Total=28392 [2022-02-11 00:50:27,376 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 602 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:27,376 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 110 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:50:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2022-02-11 00:50:27,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 192. [2022-02-11 00:50:27,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.0523560209424083) internal successors, (392), 191 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:27,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 392 transitions. [2022-02-11 00:50:27,381 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 392 transitions. Word has length 48 [2022-02-11 00:50:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:27,382 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 392 transitions. [2022-02-11 00:50:27,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.44) internal successors, (122), 49 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:27,382 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 392 transitions. [2022-02-11 00:50:27,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-11 00:50:27,382 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:27,382 INFO L515 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:27,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-02-11 00:50:27,587 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 [2022-02-11 00:50:27,587 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:27,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:27,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1192484695, now seen corresponding path program 25 times [2022-02-11 00:50:27,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:27,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642244782] [2022-02-11 00:50:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:27,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:27,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:27,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642244782] [2022-02-11 00:50:27,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642244782] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:27,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666098655] [2022-02-11 00:50:27,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:50:27,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:27,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:27,706 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) [2022-02-11 00:50:27,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-11 00:50:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:27,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:50:27,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:27,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:28,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666098655] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:28,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:28,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 12 [2022-02-11 00:50:28,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405362622] [2022-02-11 00:50:28,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:28,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 00:50:28,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:28,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 00:50:28,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:50:28,026 INFO L87 Difference]: Start difference. First operand 192 states and 392 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:28,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:28,213 INFO L93 Difference]: Finished difference Result 575 states and 1128 transitions. [2022-02-11 00:50:28,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:50:28,213 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-02-11 00:50:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:28,215 INFO L225 Difference]: With dead ends: 575 [2022-02-11 00:50:28,215 INFO L226 Difference]: Without dead ends: 506 [2022-02-11 00:50:28,215 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:50:28,215 INFO L934 BasicCegarLoop]: 75 mSDtfsCounter, 83 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:28,215 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 738 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:50:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-02-11 00:50:28,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 385. [2022-02-11 00:50:28,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.140625) internal successors, (822), 384 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:28,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 822 transitions. [2022-02-11 00:50:28,220 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 822 transitions. Word has length 50 [2022-02-11 00:50:28,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:28,220 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 822 transitions. [2022-02-11 00:50:28,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 822 transitions. [2022-02-11 00:50:28,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-11 00:50:28,221 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:28,221 INFO L515 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:28,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:28,431 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 [2022-02-11 00:50:28,431 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:28,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:28,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1208087211, now seen corresponding path program 26 times [2022-02-11 00:50:28,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:28,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76166496] [2022-02-11 00:50:28,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:28,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:28,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:28,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76166496] [2022-02-11 00:50:28,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76166496] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:28,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548864205] [2022-02-11 00:50:28,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:50:28,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:28,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:28,667 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) [2022-02-11 00:50:28,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-11 00:50:28,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:50:28,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:28,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:50:28,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:29,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:29,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548864205] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:29,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:29,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 55 [2022-02-11 00:50:29,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162492472] [2022-02-11 00:50:29,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:29,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-11 00:50:29,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:29,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-11 00:50:29,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=2499, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 00:50:29,466 INFO L87 Difference]: Start difference. First operand 385 states and 822 transitions. Second operand has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 55 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:35,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:35,060 INFO L93 Difference]: Finished difference Result 2869 states and 5504 transitions. [2022-02-11 00:50:35,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-02-11 00:50:35,061 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 55 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-02-11 00:50:35,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:35,068 INFO L225 Difference]: With dead ends: 2869 [2022-02-11 00:50:35,068 INFO L226 Difference]: Without dead ends: 2164 [2022-02-11 00:50:35,071 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24003 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=15464, Invalid=48292, Unknown=0, NotChecked=0, Total=63756 [2022-02-11 00:50:35,072 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 746 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:35,072 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 325 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1868 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:50:35,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2022-02-11 00:50:35,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 246. [2022-02-11 00:50:35,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0448979591836736) internal successors, (501), 245 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:35,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 501 transitions. [2022-02-11 00:50:35,084 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 501 transitions. Word has length 52 [2022-02-11 00:50:35,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:35,084 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 501 transitions. [2022-02-11 00:50:35,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 55 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:35,084 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 501 transitions. [2022-02-11 00:50:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-11 00:50:35,085 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:35,085 INFO L515 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:35,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-11 00:50:35,291 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 [2022-02-11 00:50:35,291 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:35,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:35,292 INFO L85 PathProgramCache]: Analyzing trace with hash 742361319, now seen corresponding path program 27 times [2022-02-11 00:50:35,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:35,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472997715] [2022-02-11 00:50:35,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:35,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:35,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:35,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472997715] [2022-02-11 00:50:35,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472997715] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:35,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313073965] [2022-02-11 00:50:35,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:50:35,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:35,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:35,459 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) [2022-02-11 00:50:35,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-11 00:50:35,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-02-11 00:50:35,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:35,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:50:35,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:35,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:36,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313073965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:36,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:36,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 23] total 54 [2022-02-11 00:50:36,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868836907] [2022-02-11 00:50:36,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:36,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-11 00:50:36,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-11 00:50:36,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=740, Invalid=2230, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:50:36,396 INFO L87 Difference]: Start difference. First operand 246 states and 501 transitions. Second operand has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 54 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:39,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:39,767 INFO L93 Difference]: Finished difference Result 1485 states and 2945 transitions. [2022-02-11 00:50:39,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-02-11 00:50:39,768 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 54 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-02-11 00:50:39,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:39,771 INFO L225 Difference]: With dead ends: 1485 [2022-02-11 00:50:39,771 INFO L226 Difference]: Without dead ends: 1481 [2022-02-11 00:50:39,773 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13889 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=10199, Invalid=28413, Unknown=0, NotChecked=0, Total=38612 [2022-02-11 00:50:39,773 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 690 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:39,773 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 121 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:50:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2022-02-11 00:50:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 210. [2022-02-11 00:50:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.0574162679425836) internal successors, (430), 209 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:39,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 430 transitions. [2022-02-11 00:50:39,779 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 430 transitions. Word has length 52 [2022-02-11 00:50:39,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:39,780 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 430 transitions. [2022-02-11 00:50:39,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 54 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:39,780 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 430 transitions. [2022-02-11 00:50:39,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-11 00:50:39,780 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:39,780 INFO L515 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:39,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-02-11 00:50:39,985 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 [2022-02-11 00:50:39,985 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:39,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:39,986 INFO L85 PathProgramCache]: Analyzing trace with hash 2041102099, now seen corresponding path program 28 times [2022-02-11 00:50:39,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:39,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853957286] [2022-02-11 00:50:39,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:39,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:40,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:40,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853957286] [2022-02-11 00:50:40,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853957286] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:40,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690236121] [2022-02-11 00:50:40,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:50:40,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:40,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:40,122 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) [2022-02-11 00:50:40,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-11 00:50:40,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:50:40,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:40,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-11 00:50:40,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:40,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:40,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690236121] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:40,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:40,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2022-02-11 00:50:40,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087637030] [2022-02-11 00:50:40,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:40,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 00:50:40,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:40,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 00:50:40,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:50:40,413 INFO L87 Difference]: Start difference. First operand 210 states and 430 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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) [2022-02-11 00:50:40,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:40,657 INFO L93 Difference]: Finished difference Result 634 states and 1245 transitions. [2022-02-11 00:50:40,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:50:40,658 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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 54 [2022-02-11 00:50:40,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:40,659 INFO L225 Difference]: With dead ends: 634 [2022-02-11 00:50:40,659 INFO L226 Difference]: Without dead ends: 559 [2022-02-11 00:50:40,660 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:50:40,660 INFO L934 BasicCegarLoop]: 82 mSDtfsCounter, 92 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:40,660 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 888 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:50:40,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-02-11 00:50:40,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 425. [2022-02-11 00:50:40,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.143867924528302) internal successors, (909), 424 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:40,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 909 transitions. [2022-02-11 00:50:40,665 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 909 transitions. Word has length 54 [2022-02-11 00:50:40,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:40,665 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 909 transitions. [2022-02-11 00:50:40,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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) [2022-02-11 00:50:40,666 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 909 transitions. [2022-02-11 00:50:40,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-11 00:50:40,666 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:40,666 INFO L515 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:40,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:40,867 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 [2022-02-11 00:50:40,867 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:40,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:40,867 INFO L85 PathProgramCache]: Analyzing trace with hash -307249647, now seen corresponding path program 29 times [2022-02-11 00:50:40,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:40,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435483416] [2022-02-11 00:50:40,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:40,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:41,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:41,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435483416] [2022-02-11 00:50:41,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435483416] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:41,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990651480] [2022-02-11 00:50:41,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:50:41,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:41,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:41,113 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) [2022-02-11 00:50:41,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-11 00:50:41,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-02-11 00:50:41,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:41,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:50:41,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:41,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:42,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990651480] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:42,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:42,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 60 [2022-02-11 00:50:42,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051985222] [2022-02-11 00:50:42,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:42,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-11 00:50:42,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:42,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-11 00:50:42,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=2978, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 00:50:42,013 INFO L87 Difference]: Start difference. First operand 425 states and 909 transitions. Second operand has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 60 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:49,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:49,179 INFO L93 Difference]: Finished difference Result 3385 states and 6492 transitions. [2022-02-11 00:50:49,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2022-02-11 00:50:49,179 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 60 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-02-11 00:50:49,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:49,186 INFO L225 Difference]: With dead ends: 3385 [2022-02-11 00:50:49,186 INFO L226 Difference]: Without dead ends: 2536 [2022-02-11 00:50:49,189 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33575 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=20880, Invalid=65262, Unknown=0, NotChecked=0, Total=86142 [2022-02-11 00:50:49,189 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 861 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 2186 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 2372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:49,189 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 341 Invalid, 2372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2186 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:50:49,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2022-02-11 00:50:49,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 268. [2022-02-11 00:50:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.048689138576779) internal successors, (547), 267 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 547 transitions. [2022-02-11 00:50:49,201 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 547 transitions. Word has length 56 [2022-02-11 00:50:49,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:49,201 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 547 transitions. [2022-02-11 00:50:49,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 60 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:49,201 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 547 transitions. [2022-02-11 00:50:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-11 00:50:49,202 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:49,202 INFO L515 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:49,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:49,411 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 [2022-02-11 00:50:49,411 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:49,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:49,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1742231065, now seen corresponding path program 30 times [2022-02-11 00:50:49,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:49,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853947628] [2022-02-11 00:50:49,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:49,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:49,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:49,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853947628] [2022-02-11 00:50:49,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853947628] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:49,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755710845] [2022-02-11 00:50:49,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:50:49,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:49,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:49,591 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) [2022-02-11 00:50:49,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-11 00:50:49,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-02-11 00:50:49,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:49,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:50:49,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:50,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:50,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755710845] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:50,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:50,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25, 25] total 59 [2022-02-11 00:50:50,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557137755] [2022-02-11 00:50:50,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:50,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-11 00:50:50,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:50,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-11 00:50:50,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=2666, Unknown=0, NotChecked=0, Total=3540 [2022-02-11 00:50:50,723 INFO L87 Difference]: Start difference. First operand 268 states and 547 transitions. Second operand has 60 states, 60 states have (on average 2.433333333333333) internal successors, (146), 59 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:54,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:54,930 INFO L93 Difference]: Finished difference Result 1751 states and 3477 transitions. [2022-02-11 00:50:54,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-02-11 00:50:54,930 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.433333333333333) internal successors, (146), 59 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-02-11 00:50:54,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:54,933 INFO L225 Difference]: With dead ends: 1751 [2022-02-11 00:50:54,933 INFO L226 Difference]: Without dead ends: 1747 [2022-02-11 00:50:54,936 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19059 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=13483, Invalid=37819, Unknown=0, NotChecked=0, Total=51302 [2022-02-11 00:50:54,936 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 764 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:54,936 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 121 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:50:54,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-02-11 00:50:54,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 228. [2022-02-11 00:50:54,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.0616740088105727) internal successors, (468), 227 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:54,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 468 transitions. [2022-02-11 00:50:54,944 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 468 transitions. Word has length 56 [2022-02-11 00:50:54,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:54,944 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 468 transitions. [2022-02-11 00:50:54,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.433333333333333) internal successors, (146), 59 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:54,944 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 468 transitions. [2022-02-11 00:50:54,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-11 00:50:54,945 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:54,945 INFO L515 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:54,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:55,161 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 [2022-02-11 00:50:55,161 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:55,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:55,162 INFO L85 PathProgramCache]: Analyzing trace with hash 162607311, now seen corresponding path program 31 times [2022-02-11 00:50:55,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:55,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131188213] [2022-02-11 00:50:55,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:55,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:55,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:55,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131188213] [2022-02-11 00:50:55,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131188213] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:55,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025356063] [2022-02-11 00:50:55,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:50:55,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:55,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:55,308 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) [2022-02-11 00:50:55,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-11 00:50:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:55,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-11 00:50:55,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:55,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:55,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025356063] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:55,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:55,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 14 [2022-02-11 00:50:55,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741239547] [2022-02-11 00:50:55,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:55,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:50:55,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:55,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:50:55,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:50:55,699 INFO L87 Difference]: Start difference. First operand 228 states and 468 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:55,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:55,948 INFO L93 Difference]: Finished difference Result 693 states and 1362 transitions. [2022-02-11 00:50:55,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:50:55,948 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-02-11 00:50:55,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:55,950 INFO L225 Difference]: With dead ends: 693 [2022-02-11 00:50:55,950 INFO L226 Difference]: Without dead ends: 612 [2022-02-11 00:50:55,950 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:50:55,950 INFO L934 BasicCegarLoop]: 89 mSDtfsCounter, 101 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:55,950 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1052 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:50:55,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-02-11 00:50:55,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 465. [2022-02-11 00:50:55,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.146551724137931) internal successors, (996), 464 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:55,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 996 transitions. [2022-02-11 00:50:55,956 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 996 transitions. Word has length 58 [2022-02-11 00:50:55,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:55,956 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 996 transitions. [2022-02-11 00:50:55,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:55,956 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 996 transitions. [2022-02-11 00:50:55,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-11 00:50:55,957 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:55,957 INFO L515 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:55,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:56,172 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 [2022-02-11 00:50:56,173 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:56,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:56,173 INFO L85 PathProgramCache]: Analyzing trace with hash 335839437, now seen corresponding path program 32 times [2022-02-11 00:50:56,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:56,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505173021] [2022-02-11 00:50:56,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:56,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:56,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:56,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505173021] [2022-02-11 00:50:56,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505173021] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:56,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471583327] [2022-02-11 00:50:56,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:50:56,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:56,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:56,493 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) [2022-02-11 00:50:56,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-11 00:50:56,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:50:56,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:56,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 00:50:56,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:57,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:57,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471583327] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:57,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:57,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 65 [2022-02-11 00:50:57,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663218220] [2022-02-11 00:50:57,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:57,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-11 00:50:57,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:57,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-11 00:50:57,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=3499, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 00:50:57,495 INFO L87 Difference]: Start difference. First operand 465 states and 996 transitions. Second operand has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:06,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:06,514 INFO L93 Difference]: Finished difference Result 3941 states and 7556 transitions. [2022-02-11 00:51:06,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2022-02-11 00:51:06,514 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-02-11 00:51:06,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:06,518 INFO L225 Difference]: With dead ends: 3941 [2022-02-11 00:51:06,518 INFO L226 Difference]: Without dead ends: 2936 [2022-02-11 00:51:06,522 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45804 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=27610, Invalid=86296, Unknown=0, NotChecked=0, Total=113906 [2022-02-11 00:51:06,522 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 1146 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 2778 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 2778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:06,522 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1146 Valid, 437 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 2778 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 00:51:06,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2022-02-11 00:51:06,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 290. [2022-02-11 00:51:06,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.0519031141868513) internal successors, (593), 289 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 593 transitions. [2022-02-11 00:51:06,534 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 593 transitions. Word has length 60 [2022-02-11 00:51:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:06,534 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 593 transitions. [2022-02-11 00:51:06,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 593 transitions. [2022-02-11 00:51:06,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-11 00:51:06,535 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:06,535 INFO L515 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:06,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-02-11 00:51:06,751 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 [2022-02-11 00:51:06,751 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:06,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:06,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1087888359, now seen corresponding path program 33 times [2022-02-11 00:51:06,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:06,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222282003] [2022-02-11 00:51:06,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:06,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:06,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:06,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222282003] [2022-02-11 00:51:06,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222282003] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:06,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628718067] [2022-02-11 00:51:06,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:51:06,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:06,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:06,935 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) [2022-02-11 00:51:06,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-11 00:51:06,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-02-11 00:51:06,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:06,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 00:51:06,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:07,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:08,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628718067] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:08,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:08,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27, 27] total 64 [2022-02-11 00:51:08,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134527532] [2022-02-11 00:51:08,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:08,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-11 00:51:08,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:08,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-11 00:51:08,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=3141, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:51:08,110 INFO L87 Difference]: Start difference. First operand 290 states and 593 transitions. Second operand has 65 states, 65 states have (on average 2.4307692307692306) internal successors, (158), 64 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:13,358 INFO L93 Difference]: Finished difference Result 2039 states and 4053 transitions. [2022-02-11 00:51:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-02-11 00:51:13,359 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.4307692307692306) internal successors, (158), 64 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-02-11 00:51:13,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:13,361 INFO L225 Difference]: With dead ends: 2039 [2022-02-11 00:51:13,362 INFO L226 Difference]: Without dead ends: 2035 [2022-02-11 00:51:13,363 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25565 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=17489, Invalid=49333, Unknown=0, NotChecked=0, Total=66822 [2022-02-11 00:51:13,364 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 683 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:13,364 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 166 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:51:13,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-02-11 00:51:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 246. [2022-02-11 00:51:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0653061224489795) internal successors, (506), 245 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 506 transitions. [2022-02-11 00:51:13,373 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 506 transitions. Word has length 60 [2022-02-11 00:51:13,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:13,373 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 506 transitions. [2022-02-11 00:51:13,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.4307692307692306) internal successors, (158), 64 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:13,374 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 506 transitions. [2022-02-11 00:51:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-11 00:51:13,374 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:13,374 INFO L515 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:13,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-11 00:51:13,590 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 [2022-02-11 00:51:13,590 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:13,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:13,591 INFO L85 PathProgramCache]: Analyzing trace with hash -304073589, now seen corresponding path program 34 times [2022-02-11 00:51:13,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:13,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195473410] [2022-02-11 00:51:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:13,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:13,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:13,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195473410] [2022-02-11 00:51:13,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195473410] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:13,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19937024] [2022-02-11 00:51:13,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:51:13,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:13,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:13,740 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) [2022-02-11 00:51:13,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-11 00:51:13,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:51:13,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:13,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 51 conjunts are in the unsatisfiable core [2022-02-11 00:51:13,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:13,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:14,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19937024] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:14,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:14,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2022-02-11 00:51:14,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606282210] [2022-02-11 00:51:14,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:14,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:51:14,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:14,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:51:14,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:51:14,091 INFO L87 Difference]: Start difference. First operand 246 states and 506 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:14,392 INFO L93 Difference]: Finished difference Result 752 states and 1479 transitions. [2022-02-11 00:51:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:51:14,392 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-02-11 00:51:14,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:14,393 INFO L225 Difference]: With dead ends: 752 [2022-02-11 00:51:14,393 INFO L226 Difference]: Without dead ends: 665 [2022-02-11 00:51:14,393 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:51:14,393 INFO L934 BasicCegarLoop]: 96 mSDtfsCounter, 110 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:14,394 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1230 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:51:14,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-02-11 00:51:14,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 505. [2022-02-11 00:51:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1488095238095237) internal successors, (1083), 504 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:14,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1083 transitions. [2022-02-11 00:51:14,400 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1083 transitions. Word has length 62 [2022-02-11 00:51:14,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:14,400 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1083 transitions. [2022-02-11 00:51:14,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:14,400 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1083 transitions. [2022-02-11 00:51:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-11 00:51:14,401 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:14,401 INFO L515 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:14,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:14,611 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 [2022-02-11 00:51:14,611 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:14,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:14,612 INFO L85 PathProgramCache]: Analyzing trace with hash -34646647, now seen corresponding path program 35 times [2022-02-11 00:51:14,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:14,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745104081] [2022-02-11 00:51:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:14,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:14,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:14,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745104081] [2022-02-11 00:51:14,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745104081] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:14,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285515271] [2022-02-11 00:51:14,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:51:14,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:14,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:14,930 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) [2022-02-11 00:51:14,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-11 00:51:14,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-02-11 00:51:14,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:14,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:51:14,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:15,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:16,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285515271] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:16,050 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:16,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 70 [2022-02-11 00:51:16,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929798469] [2022-02-11 00:51:16,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:16,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-11 00:51:16,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:16,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-11 00:51:16,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=4062, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 00:51:16,052 INFO L87 Difference]: Start difference. First operand 505 states and 1083 transitions. Second operand has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 70 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) [2022-02-11 00:51:27,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:27,388 INFO L93 Difference]: Finished difference Result 4537 states and 8696 transitions. [2022-02-11 00:51:27,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 318 states. [2022-02-11 00:51:27,388 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 70 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) Word has length 64 [2022-02-11 00:51:27,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:27,393 INFO L225 Difference]: With dead ends: 4537 [2022-02-11 00:51:27,393 INFO L226 Difference]: Without dead ends: 3364 [2022-02-11 00:51:27,398 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61155 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=35852, Invalid=111988, Unknown=0, NotChecked=0, Total=147840 [2022-02-11 00:51:27,398 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 945 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 3111 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 3315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 3111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:27,398 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 465 Invalid, 3315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 3111 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-11 00:51:27,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2022-02-11 00:51:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 312. [2022-02-11 00:51:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.054662379421222) internal successors, (639), 311 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 639 transitions. [2022-02-11 00:51:27,412 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 639 transitions. Word has length 64 [2022-02-11 00:51:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:27,412 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 639 transitions. [2022-02-11 00:51:27,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 70 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) [2022-02-11 00:51:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 639 transitions. [2022-02-11 00:51:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-11 00:51:27,413 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:27,413 INFO L515 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:27,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:27,632 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 [2022-02-11 00:51:27,632 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:27,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:27,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2080416025, now seen corresponding path program 36 times [2022-02-11 00:51:27,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:27,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774903452] [2022-02-11 00:51:27,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:27,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:27,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:27,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774903452] [2022-02-11 00:51:27,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774903452] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:27,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136833160] [2022-02-11 00:51:27,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:51:27,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:27,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:27,829 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) [2022-02-11 00:51:27,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-11 00:51:27,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-02-11 00:51:27,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:27,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:51:27,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:28,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:29,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136833160] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:29,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:29,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29, 29] total 69 [2022-02-11 00:51:29,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321457467] [2022-02-11 00:51:29,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:29,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-11 00:51:29,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:29,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-11 00:51:29,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1175, Invalid=3655, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 00:51:29,156 INFO L87 Difference]: Start difference. First operand 312 states and 639 transitions. Second operand has 70 states, 70 states have (on average 2.4285714285714284) internal successors, (170), 69 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:35,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:35,427 INFO L93 Difference]: Finished difference Result 2349 states and 4673 transitions. [2022-02-11 00:51:35,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-02-11 00:51:35,428 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.4285714285714284) internal successors, (170), 69 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-02-11 00:51:35,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:35,431 INFO L225 Difference]: With dead ends: 2349 [2022-02-11 00:51:35,431 INFO L226 Difference]: Without dead ends: 2345 [2022-02-11 00:51:35,465 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33623 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=22314, Invalid=63242, Unknown=0, NotChecked=0, Total=85556 [2022-02-11 00:51:35,466 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 943 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:35,466 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [943 Valid, 153 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:51:35,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2022-02-11 00:51:35,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 264. [2022-02-11 00:51:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.068441064638783) internal successors, (544), 263 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:35,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 544 transitions. [2022-02-11 00:51:35,475 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 544 transitions. Word has length 64 [2022-02-11 00:51:35,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:35,475 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 544 transitions. [2022-02-11 00:51:35,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.4285714285714284) internal successors, (170), 69 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:35,475 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 544 transitions. [2022-02-11 00:51:35,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-11 00:51:35,476 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:35,476 INFO L515 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:35,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:35,687 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 [2022-02-11 00:51:35,687 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:35,688 INFO L85 PathProgramCache]: Analyzing trace with hash 141085255, now seen corresponding path program 37 times [2022-02-11 00:51:35,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:35,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750628169] [2022-02-11 00:51:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:35,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:35,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:35,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750628169] [2022-02-11 00:51:35,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750628169] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:35,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203339273] [2022-02-11 00:51:35,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:51:35,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:35,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:35,863 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) [2022-02-11 00:51:35,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-11 00:51:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:35,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 55 conjunts are in the unsatisfiable core [2022-02-11 00:51:35,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:36,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:36,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203339273] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:36,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:36,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 16 [2022-02-11 00:51:36,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353219703] [2022-02-11 00:51:36,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:36,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:51:36,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:36,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:51:36,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:51:36,251 INFO L87 Difference]: Start difference. First operand 264 states and 544 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 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) [2022-02-11 00:51:36,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:36,589 INFO L93 Difference]: Finished difference Result 811 states and 1596 transitions. [2022-02-11 00:51:36,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:51:36,589 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 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 66 [2022-02-11 00:51:36,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:36,591 INFO L225 Difference]: With dead ends: 811 [2022-02-11 00:51:36,591 INFO L226 Difference]: Without dead ends: 718 [2022-02-11 00:51:36,591 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:51:36,591 INFO L934 BasicCegarLoop]: 103 mSDtfsCounter, 119 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:36,591 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 1422 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:51:36,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-02-11 00:51:36,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 545. [2022-02-11 00:51:36,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.150735294117647) internal successors, (1170), 544 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1170 transitions. [2022-02-11 00:51:36,597 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1170 transitions. Word has length 66 [2022-02-11 00:51:36,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:36,598 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 1170 transitions. [2022-02-11 00:51:36,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 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) [2022-02-11 00:51:36,598 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1170 transitions. [2022-02-11 00:51:36,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-11 00:51:36,598 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:36,599 INFO L515 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:36,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:36,814 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 [2022-02-11 00:51:36,814 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:36,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:36,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1239628869, now seen corresponding path program 38 times [2022-02-11 00:51:36,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:36,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630145742] [2022-02-11 00:51:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:36,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:37,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:37,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630145742] [2022-02-11 00:51:37,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630145742] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:37,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290384445] [2022-02-11 00:51:37,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:51:37,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:37,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:37,165 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) [2022-02-11 00:51:37,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-11 00:51:37,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:51:37,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:37,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:37,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:37,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:38,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290384445] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:38,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:38,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 75 [2022-02-11 00:51:38,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224636518] [2022-02-11 00:51:38,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:38,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-11 00:51:38,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:38,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-11 00:51:38,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1033, Invalid=4667, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 00:51:38,405 INFO L87 Difference]: Start difference. First operand 545 states and 1170 transitions. Second operand has 76 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 75 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:51,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:51,967 INFO L93 Difference]: Finished difference Result 5173 states and 9912 transitions. [2022-02-11 00:51:51,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 363 states. [2022-02-11 00:51:51,967 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 75 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-02-11 00:51:51,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:51,972 INFO L225 Difference]: With dead ends: 5173 [2022-02-11 00:51:51,972 INFO L226 Difference]: Without dead ends: 3820 [2022-02-11 00:51:51,979 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80122 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=45818, Invalid=142972, Unknown=0, NotChecked=0, Total=188790 [2022-02-11 00:51:51,979 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 1177 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 3172 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 3431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 3172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:51,979 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 530 Invalid, 3431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 3172 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-11 00:51:51,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3820 states. [2022-02-11 00:51:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3820 to 334. [2022-02-11 00:51:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.057057057057057) internal successors, (685), 333 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:51,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 685 transitions. [2022-02-11 00:51:51,994 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 685 transitions. Word has length 68 [2022-02-11 00:51:51,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:51,994 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 685 transitions. [2022-02-11 00:51:51,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 75 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:51,995 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 685 transitions. [2022-02-11 00:51:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-11 00:51:51,995 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:51,995 INFO L515 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:52,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:52,211 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 [2022-02-11 00:51:52,211 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:52,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:52,212 INFO L85 PathProgramCache]: Analyzing trace with hash -859999513, now seen corresponding path program 39 times [2022-02-11 00:51:52,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:52,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234107237] [2022-02-11 00:51:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:52,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:52,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:52,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234107237] [2022-02-11 00:51:52,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234107237] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:52,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130654466] [2022-02-11 00:51:52,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:51:52,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:52,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:52,431 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) [2022-02-11 00:51:52,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-11 00:51:52,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-02-11 00:51:52,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:52,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:52,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:53,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:53,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130654466] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:53,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:53,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31, 31] total 74 [2022-02-11 00:51:53,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158883910] [2022-02-11 00:51:53,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:53,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-11 00:51:53,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-11 00:51:53,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1342, Invalid=4208, Unknown=0, NotChecked=0, Total=5550 [2022-02-11 00:51:53,967 INFO L87 Difference]: Start difference. First operand 334 states and 685 transitions. Second operand has 75 states, 75 states have (on average 2.4266666666666667) internal successors, (182), 74 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:01,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:01,564 INFO L93 Difference]: Finished difference Result 2681 states and 5337 transitions. [2022-02-11 00:52:01,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2022-02-11 00:52:01,564 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.4266666666666667) internal successors, (182), 74 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-02-11 00:52:01,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:01,567 INFO L225 Difference]: With dead ends: 2681 [2022-02-11 00:52:01,567 INFO L226 Difference]: Without dead ends: 2677 [2022-02-11 00:52:01,571 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43465 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=28061, Invalid=79851, Unknown=0, NotChecked=0, Total=107912 [2022-02-11 00:52:01,571 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 864 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 2097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:01,571 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 194 Invalid, 2097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1831 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:52:01,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2022-02-11 00:52:01,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 282. [2022-02-11 00:52:01,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.0711743772241995) internal successors, (582), 281 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:01,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 582 transitions. [2022-02-11 00:52:01,581 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 582 transitions. Word has length 68 [2022-02-11 00:52:01,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:01,581 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 582 transitions. [2022-02-11 00:52:01,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.4266666666666667) internal successors, (182), 74 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:01,581 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 582 transitions. [2022-02-11 00:52:01,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-11 00:52:01,581 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:01,581 INFO L515 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:01,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:01,782 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 [2022-02-11 00:52:01,782 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:01,782 INFO L85 PathProgramCache]: Analyzing trace with hash 654176771, now seen corresponding path program 40 times [2022-02-11 00:52:01,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:01,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788020094] [2022-02-11 00:52:01,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:01,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:01,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:01,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788020094] [2022-02-11 00:52:01,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788020094] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:01,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972962479] [2022-02-11 00:52:01,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:52:01,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:01,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:01,964 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) [2022-02-11 00:52:01,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-11 00:52:02,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:52:02,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:02,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 59 conjunts are in the unsatisfiable core [2022-02-11 00:52:02,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:02,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:02,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972962479] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:02,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:02,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 17 [2022-02-11 00:52:02,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392064938] [2022-02-11 00:52:02,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:02,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:52:02,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:02,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:52:02,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:52:02,391 INFO L87 Difference]: Start difference. First operand 282 states and 582 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 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) [2022-02-11 00:52:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:02,770 INFO L93 Difference]: Finished difference Result 870 states and 1713 transitions. [2022-02-11 00:52:02,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:52:02,771 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 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 70 [2022-02-11 00:52:02,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:02,772 INFO L225 Difference]: With dead ends: 870 [2022-02-11 00:52:02,772 INFO L226 Difference]: Without dead ends: 771 [2022-02-11 00:52:02,772 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:52:02,773 INFO L934 BasicCegarLoop]: 110 mSDtfsCounter, 128 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:02,773 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 1628 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:52:02,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-02-11 00:52:02,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 585. [2022-02-11 00:52:02,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.1523972602739727) internal successors, (1257), 584 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:02,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1257 transitions. [2022-02-11 00:52:02,779 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1257 transitions. Word has length 70 [2022-02-11 00:52:02,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:02,779 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 1257 transitions. [2022-02-11 00:52:02,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 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) [2022-02-11 00:52:02,779 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1257 transitions. [2022-02-11 00:52:02,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-11 00:52:02,780 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:02,780 INFO L515 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:02,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:02,995 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 [2022-02-11 00:52:02,995 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:02,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:02,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1641231617, now seen corresponding path program 41 times [2022-02-11 00:52:02,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:02,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293201908] [2022-02-11 00:52:02,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:02,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:03,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:03,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293201908] [2022-02-11 00:52:03,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293201908] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:03,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135582205] [2022-02-11 00:52:03,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:52:03,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:03,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:03,390 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) [2022-02-11 00:52:03,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-11 00:52:03,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-02-11 00:52:03,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:03,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:03,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:04,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:04,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135582205] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:04,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:04,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 80 [2022-02-11 00:52:04,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780655269] [2022-02-11 00:52:04,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:04,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-11 00:52:04,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:04,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-11 00:52:04,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=5314, Unknown=0, NotChecked=0, Total=6480 [2022-02-11 00:52:04,805 INFO L87 Difference]: Start difference. First operand 585 states and 1257 transitions. Second operand has 81 states, 81 states have (on average 2.111111111111111) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:21,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:21,084 INFO L93 Difference]: Finished difference Result 5849 states and 11204 transitions. [2022-02-11 00:52:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 411 states. [2022-02-11 00:52:21,086 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.111111111111111) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-02-11 00:52:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:21,091 INFO L225 Difference]: With dead ends: 5849 [2022-02-11 00:52:21,091 INFO L226 Difference]: Without dead ends: 4304 [2022-02-11 00:52:21,099 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 486 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103245 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=57734, Invalid=179922, Unknown=0, NotChecked=0, Total=237656 [2022-02-11 00:52:21,099 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 1314 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 3750 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 4043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 3750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:21,099 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1314 Valid, 578 Invalid, 4043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 3750 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-11 00:52:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2022-02-11 00:52:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 356. [2022-02-11 00:52:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.0591549295774647) internal successors, (731), 355 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:21,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 731 transitions. [2022-02-11 00:52:21,117 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 731 transitions. Word has length 72 [2022-02-11 00:52:21,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:21,117 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 731 transitions. [2022-02-11 00:52:21,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.111111111111111) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:21,117 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 731 transitions. [2022-02-11 00:52:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-11 00:52:21,118 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:21,118 INFO L515 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:21,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:21,325 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 [2022-02-11 00:52:21,325 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:21,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:21,325 INFO L85 PathProgramCache]: Analyzing trace with hash -677292057, now seen corresponding path program 42 times [2022-02-11 00:52:21,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:21,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511449198] [2022-02-11 00:52:21,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:21,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:21,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:21,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511449198] [2022-02-11 00:52:21,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511449198] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:21,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278184549] [2022-02-11 00:52:21,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:52:21,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:21,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:21,570 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) [2022-02-11 00:52:21,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-11 00:52:21,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-02-11 00:52:21,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:21,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:21,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:22,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:23,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278184549] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:23,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:23,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33, 33] total 79 [2022-02-11 00:52:23,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164997498] [2022-02-11 00:52:23,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:23,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-11 00:52:23,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:23,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-11 00:52:23,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=4800, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 00:52:23,338 INFO L87 Difference]: Start difference. First operand 356 states and 731 transitions. Second operand has 80 states, 80 states have (on average 2.425) internal successors, (194), 79 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:32,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:32,421 INFO L93 Difference]: Finished difference Result 3035 states and 6045 transitions. [2022-02-11 00:52:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 291 states. [2022-02-11 00:52:32,421 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.425) internal successors, (194), 79 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-02-11 00:52:32,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:32,424 INFO L225 Difference]: With dead ends: 3035 [2022-02-11 00:52:32,424 INFO L226 Difference]: Without dead ends: 3031 [2022-02-11 00:52:32,430 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55340 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=34839, Invalid=99483, Unknown=0, NotChecked=0, Total=134322 [2022-02-11 00:52:32,431 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 697 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 2303 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:32,431 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 215 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2303 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:52:32,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2022-02-11 00:52:32,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 300. [2022-02-11 00:52:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.0735785953177257) internal successors, (620), 299 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 620 transitions. [2022-02-11 00:52:32,473 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 620 transitions. Word has length 72 [2022-02-11 00:52:32,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:32,473 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 620 transitions. [2022-02-11 00:52:32,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.425) internal successors, (194), 79 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 620 transitions. [2022-02-11 00:52:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-11 00:52:32,474 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:32,474 INFO L515 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:32,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:32,675 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 [2022-02-11 00:52:32,675 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:32,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:32,675 INFO L85 PathProgramCache]: Analyzing trace with hash 47360959, now seen corresponding path program 43 times [2022-02-11 00:52:32,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:32,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687847192] [2022-02-11 00:52:32,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:32,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:32,882 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:32,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687847192] [2022-02-11 00:52:32,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687847192] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:32,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960429130] [2022-02-11 00:52:32,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:52:32,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:32,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:32,883 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) [2022-02-11 00:52:32,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-11 00:52:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:32,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 63 conjunts are in the unsatisfiable core [2022-02-11 00:52:32,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:33,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:33,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960429130] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:33,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:33,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 18 [2022-02-11 00:52:33,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310802924] [2022-02-11 00:52:33,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:33,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:52:33,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:33,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:52:33,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:52:33,381 INFO L87 Difference]: Start difference. First operand 300 states and 620 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 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) [2022-02-11 00:52:33,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:33,812 INFO L93 Difference]: Finished difference Result 929 states and 1830 transitions. [2022-02-11 00:52:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:52:33,812 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 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 74 [2022-02-11 00:52:33,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:33,813 INFO L225 Difference]: With dead ends: 929 [2022-02-11 00:52:33,813 INFO L226 Difference]: Without dead ends: 824 [2022-02-11 00:52:33,814 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:52:33,814 INFO L934 BasicCegarLoop]: 117 mSDtfsCounter, 137 mSDsluCounter, 2468 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:33,814 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1848 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:52:33,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-02-11 00:52:33,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 625. [2022-02-11 00:52:33,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.1538461538461537) internal successors, (1344), 624 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:33,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1344 transitions. [2022-02-11 00:52:33,821 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1344 transitions. Word has length 74 [2022-02-11 00:52:33,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:33,821 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1344 transitions. [2022-02-11 00:52:33,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 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) [2022-02-11 00:52:33,821 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1344 transitions. [2022-02-11 00:52:33,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-11 00:52:33,822 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:33,822 INFO L515 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:33,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-02-11 00:52:34,038 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 [2022-02-11 00:52:34,038 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:34,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:34,038 INFO L85 PathProgramCache]: Analyzing trace with hash 2066890685, now seen corresponding path program 44 times [2022-02-11 00:52:34,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:34,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653238778] [2022-02-11 00:52:34,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:34,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:34,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:34,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653238778] [2022-02-11 00:52:34,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653238778] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:34,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071561235] [2022-02-11 00:52:34,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:52:34,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:34,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:34,488 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) [2022-02-11 00:52:34,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-11 00:52:34,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:52:34,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:34,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:52:34,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:35,497 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:35,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:36,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071561235] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:36,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:36,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 85 [2022-02-11 00:52:36,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859129129] [2022-02-11 00:52:36,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:36,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-02-11 00:52:36,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:36,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-02-11 00:52:36,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1307, Invalid=6003, Unknown=0, NotChecked=0, Total=7310 [2022-02-11 00:52:36,034 INFO L87 Difference]: Start difference. First operand 625 states and 1344 transitions. Second operand has 86 states, 86 states have (on average 2.104651162790698) internal successors, (181), 85 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:55,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:55,788 INFO L93 Difference]: Finished difference Result 6565 states and 12572 transitions. [2022-02-11 00:52:55,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 462 states. [2022-02-11 00:52:55,789 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.104651162790698) internal successors, (181), 85 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-02-11 00:52:55,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:55,794 INFO L225 Difference]: With dead ends: 6565 [2022-02-11 00:52:55,794 INFO L226 Difference]: Without dead ends: 4816 [2022-02-11 00:52:55,804 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 542 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131093 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=71840, Invalid=223552, Unknown=0, NotChecked=0, Total=295392 [2022-02-11 00:52:55,805 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 1419 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 4278 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1419 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 4576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 4278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:55,805 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1419 Valid, 614 Invalid, 4576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 4278 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-11 00:52:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4816 states. [2022-02-11 00:52:55,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4816 to 378. [2022-02-11 00:52:55,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.061007957559682) internal successors, (777), 377 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 777 transitions. [2022-02-11 00:52:55,823 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 777 transitions. Word has length 76 [2022-02-11 00:52:55,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:55,823 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 777 transitions. [2022-02-11 00:52:55,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.104651162790698) internal successors, (181), 85 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 777 transitions. [2022-02-11 00:52:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-11 00:52:55,824 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:55,824 INFO L515 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:55,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-02-11 00:52:56,027 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 [2022-02-11 00:52:56,027 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:56,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:56,028 INFO L85 PathProgramCache]: Analyzing trace with hash -156611097, now seen corresponding path program 45 times [2022-02-11 00:52:56,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:56,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814088486] [2022-02-11 00:52:56,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:56,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:56,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:56,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814088486] [2022-02-11 00:52:56,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814088486] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:56,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119263533] [2022-02-11 00:52:56,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:52:56,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:56,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:56,313 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) [2022-02-11 00:52:56,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-11 00:52:56,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-02-11 00:52:56,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:56,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:52:56,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:57,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:58,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119263533] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:58,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:58,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35, 35] total 84 [2022-02-11 00:52:58,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280144753] [2022-02-11 00:52:58,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:58,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-11 00:52:58,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:58,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-11 00:52:58,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1709, Invalid=5431, Unknown=0, NotChecked=0, Total=7140 [2022-02-11 00:52:58,097 INFO L87 Difference]: Start difference. First operand 378 states and 777 transitions. Second operand has 85 states, 85 states have (on average 2.4235294117647057) internal successors, (206), 84 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:09,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:09,026 INFO L93 Difference]: Finished difference Result 3411 states and 6797 transitions. [2022-02-11 00:53:09,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 326 states. [2022-02-11 00:53:09,027 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.4235294117647057) internal successors, (206), 84 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-02-11 00:53:09,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:09,031 INFO L225 Difference]: With dead ends: 3411 [2022-02-11 00:53:09,031 INFO L226 Difference]: Without dead ends: 3407 [2022-02-11 00:53:09,036 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69513 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=42763, Invalid=122479, Unknown=0, NotChecked=0, Total=165242 [2022-02-11 00:53:09,036 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 1264 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:09,036 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1264 Valid, 236 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 2450 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:53:09,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2022-02-11 00:53:09,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 318. [2022-02-11 00:53:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.0757097791798107) internal successors, (658), 317 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 658 transitions. [2022-02-11 00:53:09,048 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 658 transitions. Word has length 76 [2022-02-11 00:53:09,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:09,048 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 658 transitions. [2022-02-11 00:53:09,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.4235294117647057) internal successors, (206), 84 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:09,048 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 658 transitions. [2022-02-11 00:53:09,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-11 00:53:09,049 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:09,049 INFO L515 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:53:09,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-02-11 00:53:09,260 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 [2022-02-11 00:53:09,260 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:53:09,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:09,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1083832187, now seen corresponding path program 46 times [2022-02-11 00:53:09,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:09,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122468937] [2022-02-11 00:53:09,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:09,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:09,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:09,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122468937] [2022-02-11 00:53:09,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122468937] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:09,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065488691] [2022-02-11 00:53:09,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:53:09,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:09,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:09,488 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) [2022-02-11 00:53:09,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-11 00:53:09,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:53:09,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:09,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 67 conjunts are in the unsatisfiable core [2022-02-11 00:53:09,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:09,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:09,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065488691] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:09,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:09,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 19 [2022-02-11 00:53:09,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382819438] [2022-02-11 00:53:09,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:09,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:53:09,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:09,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:53:09,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:53:09,958 INFO L87 Difference]: Start difference. First operand 318 states and 658 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 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) [2022-02-11 00:53:10,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:10,452 INFO L93 Difference]: Finished difference Result 988 states and 1947 transitions. [2022-02-11 00:53:10,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:53:10,452 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 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 78 [2022-02-11 00:53:10,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:10,453 INFO L225 Difference]: With dead ends: 988 [2022-02-11 00:53:10,453 INFO L226 Difference]: Without dead ends: 877 [2022-02-11 00:53:10,454 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 169 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:53:10,454 INFO L934 BasicCegarLoop]: 124 mSDtfsCounter, 146 mSDsluCounter, 2792 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:10,454 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 2082 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1753 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:53:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-02-11 00:53:10,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 665. [2022-02-11 00:53:10,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.1551204819277108) internal successors, (1431), 664 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:10,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1431 transitions. [2022-02-11 00:53:10,460 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1431 transitions. Word has length 78 [2022-02-11 00:53:10,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:10,460 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1431 transitions. [2022-02-11 00:53:10,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 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) [2022-02-11 00:53:10,461 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1431 transitions. [2022-02-11 00:53:10,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-11 00:53:10,461 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:10,461 INFO L515 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:53:10,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-02-11 00:53:10,667 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 [2022-02-11 00:53:10,667 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:53:10,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:10,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1762435975, now seen corresponding path program 47 times [2022-02-11 00:53:10,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:10,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043694677] [2022-02-11 00:53:10,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:10,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:11,147 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:11,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:11,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043694677] [2022-02-11 00:53:11,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043694677] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:11,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668236917] [2022-02-11 00:53:11,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:53:11,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:11,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:11,156 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) [2022-02-11 00:53:11,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-11 00:53:11,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-02-11 00:53:11,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:11,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 00:53:11,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:12,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:12,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668236917] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:12,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:12,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 90 [2022-02-11 00:53:12,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554679780] [2022-02-11 00:53:12,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:12,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-02-11 00:53:12,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:12,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-02-11 00:53:12,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=6734, Unknown=0, NotChecked=0, Total=8190 [2022-02-11 00:53:12,794 INFO L87 Difference]: Start difference. First operand 665 states and 1431 transitions. Second operand has 91 states, 91 states have (on average 2.098901098901099) internal successors, (191), 90 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:36,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:36,818 INFO L93 Difference]: Finished difference Result 7321 states and 14016 transitions. [2022-02-11 00:53:36,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 516 states. [2022-02-11 00:53:36,818 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.098901098901099) internal successors, (191), 90 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-02-11 00:53:36,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:36,824 INFO L225 Difference]: With dead ends: 7321 [2022-02-11 00:53:36,824 INFO L226 Difference]: Without dead ends: 5356 [2022-02-11 00:53:36,836 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 601 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164281 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=88390, Invalid=274616, Unknown=0, NotChecked=0, Total=363006 [2022-02-11 00:53:36,837 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 1387 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 4254 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 4557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 4254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:36,837 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1387 Valid, 642 Invalid, 4557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 4254 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-11 00:53:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2022-02-11 00:53:36,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 400. [2022-02-11 00:53:36,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.06265664160401) internal successors, (823), 399 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 823 transitions. [2022-02-11 00:53:36,856 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 823 transitions. Word has length 80 [2022-02-11 00:53:36,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:36,856 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 823 transitions. [2022-02-11 00:53:36,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.098901098901099) internal successors, (191), 90 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 823 transitions. [2022-02-11 00:53:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-11 00:53:36,856 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:36,857 INFO L515 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:53:36,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-11 00:53:37,072 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 [2022-02-11 00:53:37,072 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:53:37,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:37,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1430754535, now seen corresponding path program 48 times [2022-02-11 00:53:37,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:37,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136739569] [2022-02-11 00:53:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:37,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:37,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:37,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136739569] [2022-02-11 00:53:37,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136739569] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:37,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200188769] [2022-02-11 00:53:37,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:53:37,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:37,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:37,360 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) [2022-02-11 00:53:37,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-11 00:53:37,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-02-11 00:53:37,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:37,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 00:53:37,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:38,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:39,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200188769] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:39,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:39,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37, 37] total 89 [2022-02-11 00:53:39,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20933068] [2022-02-11 00:53:39,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:39,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-02-11 00:53:39,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:39,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-02-11 00:53:39,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1909, Invalid=6101, Unknown=0, NotChecked=0, Total=8010 [2022-02-11 00:53:39,319 INFO L87 Difference]: Start difference. First operand 400 states and 823 transitions. Second operand has 90 states, 90 states have (on average 2.422222222222222) internal successors, (218), 89 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:51,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:51,982 INFO L93 Difference]: Finished difference Result 3809 states and 7593 transitions. [2022-02-11 00:53:51,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 363 states. [2022-02-11 00:53:51,982 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.422222222222222) internal successors, (218), 89 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-02-11 00:53:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:51,986 INFO L225 Difference]: With dead ends: 3809 [2022-02-11 00:53:51,986 INFO L226 Difference]: Without dead ends: 3805 [2022-02-11 00:53:51,993 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86266 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=51954, Invalid=149198, Unknown=0, NotChecked=0, Total=201152 [2022-02-11 00:53:51,994 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 1202 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 2758 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 3171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 2758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:51,994 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1202 Valid, 251 Invalid, 3171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 2758 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-11 00:53:51,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2022-02-11 00:53:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 336. [2022-02-11 00:53:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.0776119402985076) internal successors, (696), 335 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:52,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 696 transitions. [2022-02-11 00:53:52,006 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 696 transitions. Word has length 80 [2022-02-11 00:53:52,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:52,006 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 696 transitions. [2022-02-11 00:53:52,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.422222222222222) internal successors, (218), 89 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 696 transitions. [2022-02-11 00:53:52,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-11 00:53:52,007 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:52,007 INFO L515 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:53:52,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-11 00:53:52,223 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 [2022-02-11 00:53:52,223 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:53:52,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:52,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1887884599, now seen corresponding path program 49 times [2022-02-11 00:53:52,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:52,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459769486] [2022-02-11 00:53:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:52,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:52,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:52,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459769486] [2022-02-11 00:53:52,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459769486] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:52,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551225017] [2022-02-11 00:53:52,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:53:52,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:52,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:52,449 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) [2022-02-11 00:53:52,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-11 00:53:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:52,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 71 conjunts are in the unsatisfiable core [2022-02-11 00:53:52,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:52,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:53,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551225017] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:53,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:53,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 20 [2022-02-11 00:53:53,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148244690] [2022-02-11 00:53:53,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:53,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:53:53,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:53,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:53:53,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:53:53,021 INFO L87 Difference]: Start difference. First operand 336 states and 696 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 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) [2022-02-11 00:53:53,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:53:53,560 INFO L93 Difference]: Finished difference Result 1047 states and 2064 transitions. [2022-02-11 00:53:53,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:53:53,560 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 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 82 [2022-02-11 00:53:53,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:53:53,561 INFO L225 Difference]: With dead ends: 1047 [2022-02-11 00:53:53,561 INFO L226 Difference]: Without dead ends: 930 [2022-02-11 00:53:53,561 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:53:53,563 INFO L934 BasicCegarLoop]: 131 mSDtfsCounter, 155 mSDsluCounter, 3136 mSDsCounter, 0 mSdLazyCounter, 1964 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 2330 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:53,563 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 2330 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1964 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:53:53,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-02-11 00:53:53,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 705. [2022-02-11 00:53:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.15625) internal successors, (1518), 704 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:53:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1518 transitions. [2022-02-11 00:53:53,570 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1518 transitions. Word has length 82 [2022-02-11 00:53:53,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:53:53,570 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 1518 transitions. [2022-02-11 00:53:53,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 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) [2022-02-11 00:53:53,570 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1518 transitions. [2022-02-11 00:53:53,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-11 00:53:53,571 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:53:53,571 INFO L515 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:53:53,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-11 00:53:53,771 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 [2022-02-11 00:53:53,772 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:53:53,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:53:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2121692363, now seen corresponding path program 50 times [2022-02-11 00:53:53,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:53:53,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442790118] [2022-02-11 00:53:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:53:53,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:53:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:53:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:54,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:53:54,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442790118] [2022-02-11 00:53:54,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442790118] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:53:54,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612293159] [2022-02-11 00:53:54,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:53:54,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:54,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:53:54,278 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) [2022-02-11 00:53:54,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-11 00:53:54,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:53:54,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:53:54,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:53:54,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:53:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:55,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:53:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:53:56,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612293159] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:53:56,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:53:56,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 95 [2022-02-11 00:53:56,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154797124] [2022-02-11 00:53:56,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:53:56,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-11 00:53:56,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:53:56,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-11 00:53:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1613, Invalid=7507, Unknown=0, NotChecked=0, Total=9120 [2022-02-11 00:53:56,070 INFO L87 Difference]: Start difference. First operand 705 states and 1518 transitions. Second operand has 96 states, 96 states have (on average 2.09375) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:23,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:23,897 INFO L93 Difference]: Finished difference Result 8117 states and 15536 transitions. [2022-02-11 00:54:23,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 573 states. [2022-02-11 00:54:23,898 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.09375) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-02-11 00:54:23,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:23,904 INFO L225 Difference]: With dead ends: 8117 [2022-02-11 00:54:23,904 INFO L226 Difference]: Without dead ends: 5924 [2022-02-11 00:54:23,920 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 663 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203453 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=107652, Invalid=333908, Unknown=0, NotChecked=0, Total=441560 [2022-02-11 00:54:23,920 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 1542 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 4473 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1542 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 4791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 4473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:23,920 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1542 Valid, 695 Invalid, 4791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 4473 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-11 00:54:23,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5924 states. [2022-02-11 00:54:23,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5924 to 422. [2022-02-11 00:54:23,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.0641330166270784) internal successors, (869), 421 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 869 transitions. [2022-02-11 00:54:23,945 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 869 transitions. Word has length 84 [2022-02-11 00:54:23,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:23,945 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 869 transitions. [2022-02-11 00:54:23,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.09375) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:23,945 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 869 transitions. [2022-02-11 00:54:23,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-11 00:54:23,946 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:23,946 INFO L515 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:54:23,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-11 00:54:24,149 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 [2022-02-11 00:54:24,150 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:54:24,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:24,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1012428007, now seen corresponding path program 51 times [2022-02-11 00:54:24,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:24,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434769983] [2022-02-11 00:54:24,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:24,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:24,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:24,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434769983] [2022-02-11 00:54:24,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434769983] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:24,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762910831] [2022-02-11 00:54:24,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:54:24,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:24,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:24,454 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) [2022-02-11 00:54:24,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-11 00:54:24,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-02-11 00:54:24,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:24,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:54:24,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:25,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:26,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762910831] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:26,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:26,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39, 39] total 94 [2022-02-11 00:54:26,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331214473] [2022-02-11 00:54:26,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:26,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-02-11 00:54:26,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:26,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-02-11 00:54:26,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2120, Invalid=6810, Unknown=0, NotChecked=0, Total=8930 [2022-02-11 00:54:26,553 INFO L87 Difference]: Start difference. First operand 422 states and 869 transitions. Second operand has 95 states, 95 states have (on average 2.4210526315789473) internal successors, (230), 94 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:41,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:41,391 INFO L93 Difference]: Finished difference Result 4229 states and 8433 transitions. [2022-02-11 00:54:41,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2022-02-11 00:54:41,391 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.4210526315789473) internal successors, (230), 94 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-02-11 00:54:41,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:41,395 INFO L225 Difference]: With dead ends: 4229 [2022-02-11 00:54:41,395 INFO L226 Difference]: Without dead ends: 4225 [2022-02-11 00:54:41,403 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 491 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105897 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=62539, Invalid=180017, Unknown=0, NotChecked=0, Total=242556 [2022-02-11 00:54:41,403 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 1012 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 3171 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 3423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 3171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:41,403 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1012 Valid, 287 Invalid, 3423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 3171 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-11 00:54:41,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2022-02-11 00:54:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 354. [2022-02-11 00:54:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.0793201133144477) internal successors, (734), 353 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 734 transitions. [2022-02-11 00:54:41,417 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 734 transitions. Word has length 84 [2022-02-11 00:54:41,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:41,417 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 734 transitions. [2022-02-11 00:54:41,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.4210526315789473) internal successors, (230), 94 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 734 transitions. [2022-02-11 00:54:41,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-11 00:54:41,418 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:41,418 INFO L515 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:54:41,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-11 00:54:41,618 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 [2022-02-11 00:54:41,618 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:54:41,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:41,619 INFO L85 PathProgramCache]: Analyzing trace with hash 239879411, now seen corresponding path program 52 times [2022-02-11 00:54:41,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:41,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378807407] [2022-02-11 00:54:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:41,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:41,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:41,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378807407] [2022-02-11 00:54:41,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378807407] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:41,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974060490] [2022-02-11 00:54:41,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:54:41,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:41,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:41,854 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) [2022-02-11 00:54:41,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-11 00:54:41,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:54:41,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:41,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 75 conjunts are in the unsatisfiable core [2022-02-11 00:54:41,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:42,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:42,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974060490] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:42,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:42,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 21 [2022-02-11 00:54:42,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748787515] [2022-02-11 00:54:42,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:42,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:54:42,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:42,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:54:42,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:54:42,359 INFO L87 Difference]: Start difference. First operand 354 states and 734 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:42,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:54:42,963 INFO L93 Difference]: Finished difference Result 1106 states and 2181 transitions. [2022-02-11 00:54:42,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:54:42,963 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-02-11 00:54:42,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:54:42,965 INFO L225 Difference]: With dead ends: 1106 [2022-02-11 00:54:42,965 INFO L226 Difference]: Without dead ends: 983 [2022-02-11 00:54:42,965 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:54:42,965 INFO L934 BasicCegarLoop]: 138 mSDtfsCounter, 164 mSDsluCounter, 3500 mSDsCounter, 0 mSdLazyCounter, 2187 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:54:42,965 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 2592 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2187 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:54:42,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-02-11 00:54:42,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 745. [2022-02-11 00:54:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.157258064516129) internal successors, (1605), 744 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1605 transitions. [2022-02-11 00:54:42,972 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1605 transitions. Word has length 86 [2022-02-11 00:54:42,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:54:42,972 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1605 transitions. [2022-02-11 00:54:42,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:54:42,972 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1605 transitions. [2022-02-11 00:54:42,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-11 00:54:42,973 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:54:42,973 INFO L515 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:54:42,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-11 00:54:43,188 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 [2022-02-11 00:54:43,188 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:54:43,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:54:43,189 INFO L85 PathProgramCache]: Analyzing trace with hash -756560911, now seen corresponding path program 53 times [2022-02-11 00:54:43,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:54:43,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107743142] [2022-02-11 00:54:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:54:43,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:54:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:54:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:43,769 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:54:43,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107743142] [2022-02-11 00:54:43,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107743142] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:54:43,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409843407] [2022-02-11 00:54:43,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:54:43,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:54:43,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:54:43,771 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) [2022-02-11 00:54:43,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-11 00:54:43,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-02-11 00:54:43,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:54:43,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:54:43,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:54:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:45,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:54:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:54:45,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409843407] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:54:45,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:54:45,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 100 [2022-02-11 00:54:45,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373129523] [2022-02-11 00:54:45,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:54:45,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-02-11 00:54:45,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:54:45,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-02-11 00:54:45,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1778, Invalid=8322, Unknown=0, NotChecked=0, Total=10100 [2022-02-11 00:54:45,733 INFO L87 Difference]: Start difference. First operand 745 states and 1605 transitions. Second operand has 101 states, 101 states have (on average 2.089108910891089) internal successors, (211), 100 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:19,229 INFO L93 Difference]: Finished difference Result 8953 states and 17132 transitions. [2022-02-11 00:55:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2022-02-11 00:55:19,230 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.089108910891089) internal successors, (211), 100 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-02-11 00:55:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:19,238 INFO L225 Difference]: With dead ends: 8953 [2022-02-11 00:55:19,238 INFO L226 Difference]: Without dead ends: 6520 [2022-02-11 00:55:19,259 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 728 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249299 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=129908, Invalid=402262, Unknown=0, NotChecked=0, Total=532170 [2022-02-11 00:55:19,259 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 1805 mSDsluCounter, 1844 mSDsCounter, 0 mSdLazyCounter, 5091 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1805 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 5454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 5091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:19,260 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1805 Valid, 789 Invalid, 5454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 5091 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-11 00:55:19,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6520 states. [2022-02-11 00:55:19,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6520 to 444. [2022-02-11 00:55:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0654627539503387) internal successors, (915), 443 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 915 transitions. [2022-02-11 00:55:19,282 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 915 transitions. Word has length 88 [2022-02-11 00:55:19,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:19,282 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 915 transitions. [2022-02-11 00:55:19,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.089108910891089) internal successors, (211), 100 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:19,282 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 915 transitions. [2022-02-11 00:55:19,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-11 00:55:19,283 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:19,283 INFO L515 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:55:19,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-11 00:55:19,491 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 [2022-02-11 00:55:19,491 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:55:19,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:19,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1445729767, now seen corresponding path program 54 times [2022-02-11 00:55:19,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:19,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409250159] [2022-02-11 00:55:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:19,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:19,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:19,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409250159] [2022-02-11 00:55:19,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409250159] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:19,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704275920] [2022-02-11 00:55:19,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:55:19,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:19,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:19,818 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) [2022-02-11 00:55:19,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-11 00:55:19,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-02-11 00:55:19,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:19,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:55:19,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:21,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:22,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704275920] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:22,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:22,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41, 41] total 99 [2022-02-11 00:55:22,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71516228] [2022-02-11 00:55:22,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:22,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-02-11 00:55:22,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:22,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-02-11 00:55:22,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2342, Invalid=7558, Unknown=0, NotChecked=0, Total=9900 [2022-02-11 00:55:22,104 INFO L87 Difference]: Start difference. First operand 444 states and 915 transitions. Second operand has 100 states, 100 states have (on average 2.42) internal successors, (242), 99 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:39,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:39,920 INFO L93 Difference]: Finished difference Result 4671 states and 9317 transitions. [2022-02-11 00:55:39,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 443 states. [2022-02-11 00:55:39,920 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.42) internal successors, (242), 99 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-02-11 00:55:39,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:39,925 INFO L225 Difference]: With dead ends: 4671 [2022-02-11 00:55:39,925 INFO L226 Difference]: Without dead ends: 4667 [2022-02-11 00:55:39,934 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 537 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128721 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=74651, Invalid=215331, Unknown=0, NotChecked=0, Total=289982 [2022-02-11 00:55:39,934 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 1531 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 3732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 3292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:39,934 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 298 Invalid, 3732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 3292 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-11 00:55:39,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2022-02-11 00:55:39,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 372. [2022-02-11 00:55:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.0808625336927222) internal successors, (772), 371 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:39,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 772 transitions. [2022-02-11 00:55:39,954 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 772 transitions. Word has length 88 [2022-02-11 00:55:39,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:39,954 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 772 transitions. [2022-02-11 00:55:39,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.42) internal successors, (242), 99 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:39,955 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 772 transitions. [2022-02-11 00:55:39,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-02-11 00:55:39,955 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:39,956 INFO L515 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:55:39,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-11 00:55:40,174 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 [2022-02-11 00:55:40,174 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:55:40,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:40,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2128787793, now seen corresponding path program 55 times [2022-02-11 00:55:40,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:40,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489374213] [2022-02-11 00:55:40,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:40,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:40,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:40,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489374213] [2022-02-11 00:55:40,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489374213] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:40,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592825504] [2022-02-11 00:55:40,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:55:40,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:40,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:40,428 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) [2022-02-11 00:55:40,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-11 00:55:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:40,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 79 conjunts are in the unsatisfiable core [2022-02-11 00:55:40,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:40,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:40,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592825504] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:40,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:40,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2022-02-11 00:55:40,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87011077] [2022-02-11 00:55:40,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:40,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:55:40,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:40,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:55:40,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:55:40,951 INFO L87 Difference]: Start difference. First operand 372 states and 772 transitions. Second operand has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 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) [2022-02-11 00:55:41,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:55:41,613 INFO L93 Difference]: Finished difference Result 1165 states and 2298 transitions. [2022-02-11 00:55:41,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:55:41,614 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 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 90 [2022-02-11 00:55:41,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:55:41,615 INFO L225 Difference]: With dead ends: 1165 [2022-02-11 00:55:41,615 INFO L226 Difference]: Without dead ends: 1036 [2022-02-11 00:55:41,615 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 196 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:55:41,616 INFO L934 BasicCegarLoop]: 145 mSDtfsCounter, 173 mSDsluCounter, 3884 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2868 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:55:41,616 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 2868 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:55:41,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-02-11 00:55:41,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 785. [2022-02-11 00:55:41,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.1581632653061225) internal successors, (1692), 784 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:55:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1692 transitions. [2022-02-11 00:55:41,623 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1692 transitions. Word has length 90 [2022-02-11 00:55:41,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:55:41,624 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 1692 transitions. [2022-02-11 00:55:41,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 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) [2022-02-11 00:55:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1692 transitions. [2022-02-11 00:55:41,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-11 00:55:41,625 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:55:41,625 INFO L515 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:55:41,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-11 00:55:41,839 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 [2022-02-11 00:55:41,839 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:55:41,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:55:41,840 INFO L85 PathProgramCache]: Analyzing trace with hash -293527891, now seen corresponding path program 56 times [2022-02-11 00:55:41,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:55:41,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080273796] [2022-02-11 00:55:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:55:41,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:55:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:55:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:42,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:55:42,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080273796] [2022-02-11 00:55:42,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080273796] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:55:42,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822288550] [2022-02-11 00:55:42,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:55:42,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:55:42,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:55:42,459 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) [2022-02-11 00:55:42,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-11 00:55:42,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:55:42,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:55:42,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-11 00:55:42,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:55:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:43,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:55:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:55:44,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822288550] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:55:44,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:55:44,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 105 [2022-02-11 00:55:44,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357586566] [2022-02-11 00:55:44,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:55:44,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-02-11 00:55:44,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:55:44,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-02-11 00:55:44,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=9179, Unknown=0, NotChecked=0, Total=11130 [2022-02-11 00:55:44,542 INFO L87 Difference]: Start difference. First operand 785 states and 1692 transitions. Second operand has 106 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:23,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:23,940 INFO L93 Difference]: Finished difference Result 9829 states and 18804 transitions. [2022-02-11 00:56:23,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 696 states. [2022-02-11 00:56:23,941 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-02-11 00:56:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:23,948 INFO L225 Difference]: With dead ends: 9829 [2022-02-11 00:56:23,948 INFO L226 Difference]: Without dead ends: 7144 [2022-02-11 00:56:23,968 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 796 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302538 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=155454, Invalid=480552, Unknown=0, NotChecked=0, Total=636006 [2022-02-11 00:56:23,969 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 2440 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 5220 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2440 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 5672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 5220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:23,969 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [2440 Valid, 844 Invalid, 5672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 5220 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-11 00:56:23,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2022-02-11 00:56:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 466. [2022-02-11 00:56:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.066666666666667) internal successors, (961), 465 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 961 transitions. [2022-02-11 00:56:23,996 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 961 transitions. Word has length 92 [2022-02-11 00:56:23,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:23,996 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 961 transitions. [2022-02-11 00:56:23,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:23,997 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 961 transitions. [2022-02-11 00:56:23,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-11 00:56:23,997 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:23,997 INFO L515 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:56:24,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-11 00:56:24,211 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 [2022-02-11 00:56:24,211 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:56:24,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:24,212 INFO L85 PathProgramCache]: Analyzing trace with hash -226373657, now seen corresponding path program 57 times [2022-02-11 00:56:24,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:24,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110490657] [2022-02-11 00:56:24,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:24,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:24,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:24,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110490657] [2022-02-11 00:56:24,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110490657] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:24,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022138644] [2022-02-11 00:56:24,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:56:24,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:24,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:24,549 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) [2022-02-11 00:56:24,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-11 00:56:24,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-02-11 00:56:24,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:24,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-11 00:56:24,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:25,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:26,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022138644] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:26,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:26,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43, 43] total 104 [2022-02-11 00:56:26,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415179208] [2022-02-11 00:56:26,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:26,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-02-11 00:56:26,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:26,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-02-11 00:56:26,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2575, Invalid=8345, Unknown=0, NotChecked=0, Total=10920 [2022-02-11 00:56:26,973 INFO L87 Difference]: Start difference. First operand 466 states and 961 transitions. Second operand has 105 states, 105 states have (on average 2.419047619047619) internal successors, (254), 104 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:46,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:46,896 INFO L93 Difference]: Finished difference Result 5135 states and 10245 transitions. [2022-02-11 00:56:46,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 486 states. [2022-02-11 00:56:46,897 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.419047619047619) internal successors, (254), 104 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-02-11 00:56:46,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:46,902 INFO L225 Difference]: With dead ends: 5135 [2022-02-11 00:56:46,902 INFO L226 Difference]: Without dead ends: 5131 [2022-02-11 00:56:46,914 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 585 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155069 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=88429, Invalid=255553, Unknown=0, NotChecked=0, Total=343982 [2022-02-11 00:56:46,914 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 1144 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 3493 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 3798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 3493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:46,915 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1144 Valid, 312 Invalid, 3798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 3493 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-11 00:56:46,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2022-02-11 00:56:46,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 390. [2022-02-11 00:56:46,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.082262210796915) internal successors, (810), 389 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:46,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 810 transitions. [2022-02-11 00:56:46,932 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 810 transitions. Word has length 92 [2022-02-11 00:56:46,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:46,932 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 810 transitions. [2022-02-11 00:56:46,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.419047619047619) internal successors, (254), 104 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:46,932 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 810 transitions. [2022-02-11 00:56:46,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-11 00:56:46,933 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:46,933 INFO L515 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:56:46,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-11 00:56:47,133 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 [2022-02-11 00:56:47,133 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:56:47,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:47,134 INFO L85 PathProgramCache]: Analyzing trace with hash 464312939, now seen corresponding path program 58 times [2022-02-11 00:56:47,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:47,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859500119] [2022-02-11 00:56:47,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:47,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:47,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:47,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859500119] [2022-02-11 00:56:47,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859500119] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:47,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125046632] [2022-02-11 00:56:47,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:56:47,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:47,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:47,448 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) [2022-02-11 00:56:47,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-11 00:56:47,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:56:47,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:47,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 83 conjunts are in the unsatisfiable core [2022-02-11 00:56:47,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:47,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:48,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125046632] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:48,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:48,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 23 [2022-02-11 00:56:48,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154100034] [2022-02-11 00:56:48,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:48,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:56:48,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:48,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:56:48,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:56:48,052 INFO L87 Difference]: Start difference. First operand 390 states and 810 transitions. Second operand has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 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) [2022-02-11 00:56:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:56:48,777 INFO L93 Difference]: Finished difference Result 1224 states and 2415 transitions. [2022-02-11 00:56:48,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:56:48,778 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 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 94 [2022-02-11 00:56:48,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:56:48,779 INFO L225 Difference]: With dead ends: 1224 [2022-02-11 00:56:48,779 INFO L226 Difference]: Without dead ends: 1089 [2022-02-11 00:56:48,779 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 205 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:56:48,779 INFO L934 BasicCegarLoop]: 152 mSDtfsCounter, 182 mSDsluCounter, 4288 mSDsCounter, 0 mSdLazyCounter, 2669 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 3158 SdHoareTripleChecker+Invalid, 2670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:56:48,779 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 3158 Invalid, 2670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2669 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:56:48,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-02-11 00:56:48,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 825. [2022-02-11 00:56:48,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.158980582524272) internal successors, (1779), 824 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:56:48,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1779 transitions. [2022-02-11 00:56:48,787 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1779 transitions. Word has length 94 [2022-02-11 00:56:48,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:56:48,788 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 1779 transitions. [2022-02-11 00:56:48,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 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) [2022-02-11 00:56:48,788 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1779 transitions. [2022-02-11 00:56:48,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-11 00:56:48,788 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:56:48,789 INFO L515 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:56:48,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-02-11 00:56:49,003 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 [2022-02-11 00:56:49,003 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:56:49,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:56:49,003 INFO L85 PathProgramCache]: Analyzing trace with hash 55083881, now seen corresponding path program 59 times [2022-02-11 00:56:49,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:56:49,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579049020] [2022-02-11 00:56:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:56:49,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:56:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:56:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:49,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:56:49,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579049020] [2022-02-11 00:56:49,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579049020] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:56:49,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388299910] [2022-02-11 00:56:49,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:56:49,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:56:49,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:56:49,702 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) [2022-02-11 00:56:49,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-11 00:56:49,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-02-11 00:56:49,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:56:49,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-11 00:56:49,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:56:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:51,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:56:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:56:51,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388299910] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:56:51,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:56:51,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 110 [2022-02-11 00:56:51,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584148140] [2022-02-11 00:56:51,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:56:51,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-02-11 00:56:51,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:56:51,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-02-11 00:56:51,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2132, Invalid=10078, Unknown=0, NotChecked=0, Total=12210 [2022-02-11 00:56:51,966 INFO L87 Difference]: Start difference. First operand 825 states and 1779 transitions. Second operand has 111 states, 111 states have (on average 2.081081081081081) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:57:38,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:57:38,731 INFO L93 Difference]: Finished difference Result 10745 states and 20552 transitions. [2022-02-11 00:57:38,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 762 states. [2022-02-11 00:57:38,732 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.081081081081081) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-02-11 00:57:38,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:57:38,741 INFO L225 Difference]: With dead ends: 10745 [2022-02-11 00:57:38,741 INFO L226 Difference]: Without dead ends: 7796 [2022-02-11 00:57:38,767 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 994 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 867 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363935 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=184600, Invalid=569692, Unknown=0, NotChecked=0, Total=754292 [2022-02-11 00:57:38,767 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 1611 mSDsluCounter, 2252 mSDsCounter, 0 mSdLazyCounter, 6520 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1611 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 6864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 6520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:57:38,767 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1611 Valid, 933 Invalid, 6864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 6520 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-11 00:57:38,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7796 states. [2022-02-11 00:57:38,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7796 to 488. [2022-02-11 00:57:38,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.0677618069815193) internal successors, (1007), 487 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:57:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1007 transitions. [2022-02-11 00:57:38,796 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1007 transitions. Word has length 96 [2022-02-11 00:57:38,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:57:38,797 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1007 transitions. [2022-02-11 00:57:38,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.081081081081081) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:57:38,797 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1007 transitions. [2022-02-11 00:57:38,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-11 00:57:38,798 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:57:38,798 INFO L515 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:57:38,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-11 00:57:39,011 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 [2022-02-11 00:57:39,011 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:57:39,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:57:39,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1250482919, now seen corresponding path program 60 times [2022-02-11 00:57:39,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:57:39,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629128239] [2022-02-11 00:57:39,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:57:39,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:57:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:57:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:57:39,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:57:39,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629128239] [2022-02-11 00:57:39,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629128239] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:57:39,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195720888] [2022-02-11 00:57:39,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:57:39,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:57:39,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:57:39,382 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) [2022-02-11 00:57:39,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-11 00:57:39,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-02-11 00:57:39,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:57:39,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-11 00:57:39,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:57:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:57:40,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:57:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:57:42,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195720888] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:57:42,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:57:42,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45, 45] total 109 [2022-02-11 00:57:42,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380395635] [2022-02-11 00:57:42,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:57:42,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-02-11 00:57:42,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:57:42,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-02-11 00:57:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2819, Invalid=9171, Unknown=0, NotChecked=0, Total=11990 [2022-02-11 00:57:42,024 INFO L87 Difference]: Start difference. First operand 488 states and 1007 transitions. Second operand has 110 states, 110 states have (on average 2.418181818181818) internal successors, (266), 109 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:58:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:58:05,811 INFO L93 Difference]: Finished difference Result 5621 states and 11217 transitions. [2022-02-11 00:58:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 531 states. [2022-02-11 00:58:05,812 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.418181818181818) internal successors, (266), 109 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-02-11 00:58:05,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:58:05,816 INFO L225 Difference]: With dead ends: 5621 [2022-02-11 00:58:05,816 INFO L226 Difference]: Without dead ends: 5617 [2022-02-11 00:58:05,829 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 635 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185289 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=104018, Invalid=301114, Unknown=0, NotChecked=0, Total=405132 [2022-02-11 00:58:05,829 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 1720 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 3564 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1720 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 3994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 3564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:58:05,830 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1720 Valid, 330 Invalid, 3994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 3564 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-11 00:58:05,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2022-02-11 00:58:05,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 408. [2022-02-11 00:58:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.0835380835380835) internal successors, (848), 407 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:58:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 848 transitions. [2022-02-11 00:58:05,847 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 848 transitions. Word has length 96 [2022-02-11 00:58:05,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:58:05,847 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 848 transitions. [2022-02-11 00:58:05,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.418181818181818) internal successors, (266), 109 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:58:05,847 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 848 transitions. [2022-02-11 00:58:05,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-11 00:58:05,848 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:58:05,848 INFO L515 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:58:05,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-11 00:58:06,051 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 [2022-02-11 00:58:06,051 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:58:06,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:58:06,052 INFO L85 PathProgramCache]: Analyzing trace with hash 472776743, now seen corresponding path program 61 times [2022-02-11 00:58:06,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:58:06,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994703623] [2022-02-11 00:58:06,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:58:06,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:58:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:58:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:58:06,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:58:06,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994703623] [2022-02-11 00:58:06,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994703623] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:58:06,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326615644] [2022-02-11 00:58:06,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:58:06,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:58:06,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:58:06,361 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:58:06,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-11 00:58:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:58:06,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 87 conjunts are in the unsatisfiable core [2022-02-11 00:58:06,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:58:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:58:06,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:58:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:58:06,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326615644] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:58:06,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:58:06,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 24 [2022-02-11 00:58:06,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171992012] [2022-02-11 00:58:06,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:58:06,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:58:06,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:58:06,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:58:06,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:58:06,923 INFO L87 Difference]: Start difference. First operand 408 states and 848 transitions. Second operand has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:58:07,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:58:07,724 INFO L93 Difference]: Finished difference Result 1283 states and 2532 transitions. [2022-02-11 00:58:07,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:58:07,724 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-02-11 00:58:07,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:58:07,725 INFO L225 Difference]: With dead ends: 1283 [2022-02-11 00:58:07,725 INFO L226 Difference]: Without dead ends: 1142 [2022-02-11 00:58:07,726 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 214 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:58:07,726 INFO L934 BasicCegarLoop]: 159 mSDtfsCounter, 191 mSDsluCounter, 4712 mSDsCounter, 0 mSdLazyCounter, 2928 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 3462 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:58:07,726 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 3462 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2928 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:58:07,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-02-11 00:58:07,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 865. [2022-02-11 00:58:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.1597222222222223) internal successors, (1866), 864 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:58:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1866 transitions. [2022-02-11 00:58:07,734 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1866 transitions. Word has length 98 [2022-02-11 00:58:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:58:07,734 INFO L470 AbstractCegarLoop]: Abstraction has 865 states and 1866 transitions. [2022-02-11 00:58:07,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:58:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1866 transitions. [2022-02-11 00:58:07,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-02-11 00:58:07,735 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:58:07,735 INFO L515 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:58:07,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-02-11 00:58:07,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:58:07,936 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:58:07,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:58:07,936 INFO L85 PathProgramCache]: Analyzing trace with hash 196147749, now seen corresponding path program 62 times [2022-02-11 00:58:07,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:58:07,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759816156] [2022-02-11 00:58:07,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:58:07,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:58:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:58:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:58:08,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:58:08,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759816156] [2022-02-11 00:58:08,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759816156] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:58:08,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502002884] [2022-02-11 00:58:08,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:58:08,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:58:08,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:58:08,634 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:58:08,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-11 00:58:08,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:58:08,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:58:08,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-11 00:58:08,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:58:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:58:10,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:58:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:58:11,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502002884] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:58:11,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:58:11,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 115 [2022-02-11 00:58:11,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121237773] [2022-02-11 00:58:11,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:58:11,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-02-11 00:58:11,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:58:11,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-02-11 00:58:11,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2321, Invalid=11019, Unknown=0, NotChecked=0, Total=13340 [2022-02-11 00:58:11,063 INFO L87 Difference]: Start difference. First operand 865 states and 1866 transitions. Second operand has 116 states, 116 states have (on average 2.0775862068965516) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:05,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:59:05,488 INFO L93 Difference]: Finished difference Result 11701 states and 22376 transitions. [2022-02-11 00:59:05,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 831 states. [2022-02-11 00:59:05,488 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0775862068965516) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-02-11 00:59:05,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:59:05,497 INFO L225 Difference]: With dead ends: 11701 [2022-02-11 00:59:05,497 INFO L226 Difference]: Without dead ends: 8476 [2022-02-11 00:59:05,532 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 1073 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 941 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434284 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=217670, Invalid=670636, Unknown=0, NotChecked=0, Total=888306 [2022-02-11 00:59:05,532 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 1966 mSDsluCounter, 2198 mSDsCounter, 0 mSdLazyCounter, 6012 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1966 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 6389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 6012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:59:05,533 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1966 Valid, 931 Invalid, 6389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 6012 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-11 00:59:05,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8476 states. [2022-02-11 00:59:05,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8476 to 510. [2022-02-11 00:59:05,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 2.068762278978389) internal successors, (1053), 509 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1053 transitions. [2022-02-11 00:59:05,567 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1053 transitions. Word has length 100 [2022-02-11 00:59:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:59:05,567 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 1053 transitions. [2022-02-11 00:59:05,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0775862068965516) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1053 transitions. [2022-02-11 00:59:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-02-11 00:59:05,568 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:59:05,568 INFO L515 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:59:05,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-11 00:59:05,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-11 00:59:05,769 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:59:05,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:59:05,769 INFO L85 PathProgramCache]: Analyzing trace with hash -991922457, now seen corresponding path program 63 times [2022-02-11 00:59:05,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:59:05,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745191418] [2022-02-11 00:59:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:59:05,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:59:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:59:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:06,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:59:06,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745191418] [2022-02-11 00:59:06,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745191418] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:59:06,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842636357] [2022-02-11 00:59:06,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:59:06,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:59:06,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:59:06,238 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:59:06,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-11 00:59:06,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-02-11 00:59:06,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:59:06,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-11 00:59:06,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:59:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:07,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:59:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:09,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842636357] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:59:09,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:59:09,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 47, 47] total 114 [2022-02-11 00:59:09,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211654410] [2022-02-11 00:59:09,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:59:09,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-02-11 00:59:09,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:59:09,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-02-11 00:59:09,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3074, Invalid=10036, Unknown=0, NotChecked=0, Total=13110 [2022-02-11 00:59:09,029 INFO L87 Difference]: Start difference. First operand 510 states and 1053 transitions. Second operand has 115 states, 115 states have (on average 2.417391304347826) internal successors, (278), 114 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:35,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:59:35,934 INFO L93 Difference]: Finished difference Result 6129 states and 12233 transitions. [2022-02-11 00:59:35,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 578 states. [2022-02-11 00:59:35,935 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.417391304347826) internal successors, (278), 114 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-02-11 00:59:35,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:59:35,941 INFO L225 Difference]: With dead ends: 6129 [2022-02-11 00:59:35,942 INFO L226 Difference]: Without dead ends: 6125 [2022-02-11 00:59:35,959 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 687 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219745 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=121569, Invalid=352463, Unknown=0, NotChecked=0, Total=474032 [2022-02-11 00:59:35,960 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 1846 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 3465 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1846 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 3911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 3465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:59:35,960 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1846 Valid, 331 Invalid, 3911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 3465 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-11 00:59:35,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6125 states. [2022-02-11 00:59:35,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6125 to 426. [2022-02-11 00:59:35,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.084705882352941) internal successors, (886), 425 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 886 transitions. [2022-02-11 00:59:35,987 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 886 transitions. Word has length 100 [2022-02-11 00:59:35,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:59:35,987 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 886 transitions. [2022-02-11 00:59:35,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.417391304347826) internal successors, (278), 114 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 886 transitions. [2022-02-11 00:59:35,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-11 00:59:35,988 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:59:35,988 INFO L515 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:59:36,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-02-11 00:59:36,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:59:36,188 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:59:36,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:59:36,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1403799581, now seen corresponding path program 64 times [2022-02-11 00:59:36,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:59:36,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043527089] [2022-02-11 00:59:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:59:36,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:59:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:59:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:36,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:59:36,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043527089] [2022-02-11 00:59:36,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043527089] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:59:36,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751548798] [2022-02-11 00:59:36,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:59:36,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:59:36,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:59:36,527 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:59:36,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-11 00:59:36,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:59:36,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:59:36,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 91 conjunts are in the unsatisfiable core [2022-02-11 00:59:36,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:59:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:36,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:59:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:37,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751548798] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:59:37,171 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:59:37,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 25 [2022-02-11 00:59:37,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143504769] [2022-02-11 00:59:37,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:59:37,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:59:37,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:59:37,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:59:37,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:59:37,173 INFO L87 Difference]: Start difference. First operand 426 states and 886 transitions. Second operand has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:59:38,149 INFO L93 Difference]: Finished difference Result 1342 states and 2649 transitions. [2022-02-11 00:59:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:59:38,150 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-02-11 00:59:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:59:38,151 INFO L225 Difference]: With dead ends: 1342 [2022-02-11 00:59:38,151 INFO L226 Difference]: Without dead ends: 1195 [2022-02-11 00:59:38,152 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 223 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:59:38,152 INFO L934 BasicCegarLoop]: 166 mSDtfsCounter, 200 mSDsluCounter, 5156 mSDsCounter, 0 mSdLazyCounter, 3199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 3780 SdHoareTripleChecker+Invalid, 3200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:59:38,152 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 3780 Invalid, 3200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3199 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:59:38,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-02-11 00:59:38,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 905. [2022-02-11 00:59:38,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.1603982300884956) internal successors, (1953), 904 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:38,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1953 transitions. [2022-02-11 00:59:38,161 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1953 transitions. Word has length 102 [2022-02-11 00:59:38,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:59:38,161 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1953 transitions. [2022-02-11 00:59:38,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:59:38,161 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1953 transitions. [2022-02-11 00:59:38,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-11 00:59:38,162 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:59:38,162 INFO L515 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:59:38,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-02-11 00:59:38,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-02-11 00:59:38,363 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:59:38,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:59:38,363 INFO L85 PathProgramCache]: Analyzing trace with hash -844266783, now seen corresponding path program 65 times [2022-02-11 00:59:38,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:59:38,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24544523] [2022-02-11 00:59:38,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:59:38,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:59:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:59:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:39,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:59:39,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24544523] [2022-02-11 00:59:39,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24544523] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:59:39,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902789535] [2022-02-11 00:59:39,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:59:39,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:59:39,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:59:39,129 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:59:39,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-11 00:59:39,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-02-11 00:59:39,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:59:39,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-11 00:59:39,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:59:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:40,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:59:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:59:41,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902789535] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:59:41,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:59:41,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 120 [2022-02-11 00:59:41,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860718808] [2022-02-11 00:59:41,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:59:41,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-02-11 00:59:41,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:59:41,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-02-11 00:59:41,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2518, Invalid=12002, Unknown=0, NotChecked=0, Total=14520 [2022-02-11 00:59:41,754 INFO L87 Difference]: Start difference. First operand 905 states and 1953 transitions. Second operand has 121 states, 121 states have (on average 2.074380165289256) internal successors, (251), 120 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:00:45,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:00:45,520 INFO L93 Difference]: Finished difference Result 12697 states and 24276 transitions. [2022-02-11 01:00:45,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 903 states. [2022-02-11 01:00:45,521 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.074380165289256) internal successors, (251), 120 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-02-11 01:00:45,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:00:45,531 INFO L225 Difference]: With dead ends: 12697 [2022-02-11 01:00:45,531 INFO L226 Difference]: Without dead ends: 9184 [2022-02-11 01:00:45,574 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 1155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 1018 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514425 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=255002, Invalid=784378, Unknown=0, NotChecked=0, Total=1039380 [2022-02-11 01:00:45,574 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 2075 mSDsluCounter, 2530 mSDsCounter, 0 mSdLazyCounter, 7087 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2075 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 7555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 7087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:00:45,574 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [2075 Valid, 1078 Invalid, 7555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 7087 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-02-11 01:00:45,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9184 states. [2022-02-11 01:00:45,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9184 to 532. [2022-02-11 01:00:45,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.0696798493408664) internal successors, (1099), 531 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:00:45,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1099 transitions. [2022-02-11 01:00:45,605 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1099 transitions. Word has length 104 [2022-02-11 01:00:45,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:00:45,605 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 1099 transitions. [2022-02-11 01:00:45,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.074380165289256) internal successors, (251), 120 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:00:45,605 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1099 transitions. [2022-02-11 01:00:45,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-11 01:00:45,606 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:00:45,606 INFO L515 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:00:45,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-11 01:00:45,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-02-11 01:00:45,807 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:00:45,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:00:45,807 INFO L85 PathProgramCache]: Analyzing trace with hash 966255591, now seen corresponding path program 66 times [2022-02-11 01:00:45,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:00:45,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521974430] [2022-02-11 01:00:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:00:45,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:00:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:00:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:00:46,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:00:46,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521974430] [2022-02-11 01:00:46,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521974430] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:00:46,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800550032] [2022-02-11 01:00:46,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:00:46,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:00:46,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:00:46,223 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:00:46,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-11 01:00:46,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2022-02-11 01:00:46,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:00:46,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-11 01:00:46,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:00:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:00:47,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:00:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:00:49,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800550032] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:00:49,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:00:49,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 49, 49] total 119 [2022-02-11 01:00:49,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400379667] [2022-02-11 01:00:49,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:00:49,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-02-11 01:00:49,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:00:49,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-02-11 01:00:49,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3340, Invalid=10940, Unknown=0, NotChecked=0, Total=14280 [2022-02-11 01:00:49,340 INFO L87 Difference]: Start difference. First operand 532 states and 1099 transitions. Second operand has 120 states, 120 states have (on average 2.4166666666666665) internal successors, (290), 119 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:01:20,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:01:20,894 INFO L93 Difference]: Finished difference Result 6659 states and 13293 transitions. [2022-02-11 01:01:20,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 627 states. [2022-02-11 01:01:20,895 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.4166666666666665) internal successors, (290), 119 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-02-11 01:01:20,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:01:20,902 INFO L225 Difference]: With dead ends: 6659 [2022-02-11 01:01:20,902 INFO L226 Difference]: Without dead ends: 6655 [2022-02-11 01:01:20,923 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 741 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258818 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=141239, Invalid=410067, Unknown=0, NotChecked=0, Total=551306 [2022-02-11 01:01:20,924 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 1211 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 4546 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 4831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 4546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:01:20,924 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1211 Valid, 395 Invalid, 4831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 4546 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-11 01:01:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6655 states. [2022-02-11 01:01:20,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6655 to 444. [2022-02-11 01:01:20,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0857787810383748) internal successors, (924), 443 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:01:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 924 transitions. [2022-02-11 01:01:20,948 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 924 transitions. Word has length 104 [2022-02-11 01:01:20,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:01:20,948 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 924 transitions. [2022-02-11 01:01:20,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.4166666666666665) internal successors, (290), 119 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:01:20,948 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 924 transitions. [2022-02-11 01:01:20,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-02-11 01:01:20,949 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:01:20,949 INFO L515 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:01:20,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-11 01:01:21,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-11 01:01:21,149 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:01:21,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:01:21,150 INFO L85 PathProgramCache]: Analyzing trace with hash -514784865, now seen corresponding path program 67 times [2022-02-11 01:01:21,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:01:21,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187506364] [2022-02-11 01:01:21,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:01:21,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:01:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:01:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:01:21,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:01:21,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187506364] [2022-02-11 01:01:21,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187506364] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:01:21,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149590533] [2022-02-11 01:01:21,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:01:21,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:01:21,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:01:21,484 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:01:21,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-11 01:01:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:01:21,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 95 conjunts are in the unsatisfiable core [2022-02-11 01:01:21,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:01:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:01:21,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:01:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:01:22,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149590533] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:01:22,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:01:22,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 26 [2022-02-11 01:01:22,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251024642] [2022-02-11 01:01:22,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:01:22,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:01:22,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:01:22,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:01:22,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:01:22,158 INFO L87 Difference]: Start difference. First operand 444 states and 924 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:01:23,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:01:23,129 INFO L93 Difference]: Finished difference Result 1401 states and 2766 transitions. [2022-02-11 01:01:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 01:01:23,129 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-02-11 01:01:23,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:01:23,131 INFO L225 Difference]: With dead ends: 1401 [2022-02-11 01:01:23,131 INFO L226 Difference]: Without dead ends: 1248 [2022-02-11 01:01:23,131 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:01:23,131 INFO L934 BasicCegarLoop]: 173 mSDtfsCounter, 209 mSDsluCounter, 5620 mSDsCounter, 0 mSdLazyCounter, 3482 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 4112 SdHoareTripleChecker+Invalid, 3483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:01:23,132 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 4112 Invalid, 3483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3482 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 01:01:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-02-11 01:01:23,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 945. [2022-02-11 01:01:23,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 2.1610169491525424) internal successors, (2040), 944 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:01:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 2040 transitions. [2022-02-11 01:01:23,140 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 2040 transitions. Word has length 106 [2022-02-11 01:01:23,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:01:23,140 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 2040 transitions. [2022-02-11 01:01:23,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:01:23,141 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 2040 transitions. [2022-02-11 01:01:23,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-11 01:01:23,142 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:01:23,142 INFO L515 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:01:23,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-11 01:01:23,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-11 01:01:23,342 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:01:23,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:01:23,342 INFO L85 PathProgramCache]: Analyzing trace with hash -625926755, now seen corresponding path program 68 times [2022-02-11 01:01:23,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:01:23,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250621338] [2022-02-11 01:01:23,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:01:23,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:01:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:01:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:01:24,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:01:24,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250621338] [2022-02-11 01:01:24,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250621338] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:01:24,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712949121] [2022-02-11 01:01:24,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:01:24,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:01:24,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:01:24,167 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:01:24,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-11 01:01:24,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:01:24,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:01:24,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 51 conjunts are in the unsatisfiable core [2022-02-11 01:01:24,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:01:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:01:26,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:01:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:01:27,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712949121] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:01:27,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:01:27,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 125 [2022-02-11 01:01:27,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270278461] [2022-02-11 01:01:27,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:01:27,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-02-11 01:01:27,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:01:27,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-02-11 01:01:27,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2723, Invalid=13027, Unknown=0, NotChecked=0, Total=15750 [2022-02-11 01:01:27,024 INFO L87 Difference]: Start difference. First operand 945 states and 2040 transitions. Second operand has 126 states, 126 states have (on average 2.0714285714285716) internal successors, (261), 125 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-02-11 01:02:11,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 685 states. [2022-02-11 01:02:11,024 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 [2022-02-11 01:02:11,024 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-11 01:02:11,035 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 805 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317258 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=174631, Invalid=475811, Unknown=0, NotChecked=0, Total=650442 [2022-02-11 01:02:11,035 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 2148 mSDsluCounter, 2086 mSDsCounter, 0 mSdLazyCounter, 6363 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2148 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 6833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 6363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:02:11,036 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [2148 Valid, 782 Invalid, 6833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 6363 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-11 01:02:11,037 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-11 01:02:11,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-02-11 01:02:11,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:02:11,237 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (945states) and FLOYD_HOARE automaton (currently 685 states, 126 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 807 known predicates. [2022-02-11 01:02:11,239 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-11 01:02:11,239 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-11 01:02:11,241 INFO L733 BasicCegarLoop]: Path program histogram: [68, 2, 1] [2022-02-11 01:02:11,242 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-11 01:02:11,243 INFO L184 ceAbstractionStarter]: Computing trace abstraction results [2022-02-11 01:02:11,244 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.02 01:02:11 BasicIcfg [2022-02-11 01:02:11,244 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-11 01:02:11,244 INFO L158 Benchmark]: Toolchain (without parser) took 747994.13ms. Allocated memory was 179.3MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 145.8MB in the beginning and 521.5MB in the end (delta: -375.7MB). Peak memory consumption was 1.1GB. Max. memory is 8.0GB. [2022-02-11 01:02:11,244 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 179.3MB. Free memory is still 146.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 01:02:11,244 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.29ms. Allocated memory is still 179.3MB. Free memory was 145.8MB in the beginning and 144.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-11 01:02:11,244 INFO L158 Benchmark]: Boogie Preprocessor took 10.25ms. Allocated memory is still 179.3MB. Free memory was 144.3MB in the beginning and 143.3MB in the end (delta: 912.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-11 01:02:11,244 INFO L158 Benchmark]: RCFGBuilder took 216.16ms. Allocated memory is still 179.3MB. Free memory was 143.2MB in the beginning and 134.4MB in the end (delta: 8.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-11 01:02:11,245 INFO L158 Benchmark]: TraceAbstraction took 747742.27ms. Allocated memory was 179.3MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 133.9MB in the beginning and 521.5MB in the end (delta: -387.6MB). Peak memory consumption was 1.1GB. Max. memory is 8.0GB. [2022-02-11 01:02:11,245 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 0.13ms. Allocated memory is still 179.3MB. Free memory is still 146.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.29ms. Allocated memory is still 179.3MB. Free memory was 145.8MB in the beginning and 144.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.25ms. Allocated memory is still 179.3MB. Free memory was 144.3MB in the beginning and 143.3MB in the end (delta: 912.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 216.16ms. Allocated memory is still 179.3MB. Free memory was 143.2MB in the beginning and 134.4MB in the end (delta: 8.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 747742.27ms. Allocated memory was 179.3MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 133.9MB in the beginning and 521.5MB in the end (delta: -387.6MB). Peak memory consumption was 1.1GB. 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: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (945states) and FLOYD_HOARE automaton (currently 685 states, 126 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 807 known predicates. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (945states) and FLOYD_HOARE automaton (currently 685 states, 126 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 807 known predicates. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (945states) and FLOYD_HOARE automaton (currently 685 states, 126 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 807 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 747.6s, OverallIterations: 71, TraceHistogramMax: 24, PathProgramHistogramMax: 68, EmptinessCheckTime: 0.0s, AutomataDifference: 645.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 47339 SdHoareTripleChecker+Valid, 65.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 47339 mSDsluCounter, 50930 SdHoareTripleChecker+Invalid, 55.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 83108 mSDsCounter, 10497 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 143177 IncrementalHoareTripleChecker+Invalid, 153674 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10497 mSolverCounterUnsat, 2666 mSDtfsCounter, 143177 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24283 GetRequests, 6903 SyntacticMatches, 115 SemanticMatches, 17264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4500184 ImplicationChecksByTransitivity, 488.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=945occurred in iteration=70, InterpolantAutomatonStates: 13772, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 70 MinimizatonAttempts, 130948 StatesRemovedByMinimization, 70 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 83.7s InterpolantComputationTime, 8586 NumberOfCodeBlocks, 8586 NumberOfCodeBlocksAsserted, 613 NumberOfCheckSat, 12655 ConstructedInterpolants, 0 QuantifiedInterpolants, 99032 SizeOfPredicates, 345 NumberOfNonLiveVariables, 11017 ConjunctsInSsa, 2461 ConjunctsInUnsatCore, 209 InterpolantComputations, 3 PerfectInterpolantSequences, 26012/77971 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